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1c1aeb20e2
Paper-Old/patches/server/0016-Rewrite-chunk-system.patch
Spottedleaf b8131a09b2 Mark chunks as saved after saving them 
Prevents re-saving them again later.
2022-10-23 09:09:18 -07:00

18056 Zeilen
816 KiB
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Thu, 11 Mar 2021 02:32:30 -0800
Subject: [PATCH] Rewrite chunk system
diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
index 9a5fa60cb8156fe254a123e237d957ccb82f7195..0f7d36933e34e1d1b9dd27d8b0c35ff883818526 100644
--- a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
+++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
@@ -41,14 +41,14 @@ public final class StarLightInterface {
protected final ArrayDeque<SkyStarLightEngine> cachedSkyPropagators;
protected final ArrayDeque<BlockStarLightEngine> cachedBlockPropagators;
- protected final LightQueue lightQueue = new LightQueue(this);
+ public final io.papermc.paper.chunk.system.light.LightQueue lightQueue; // Paper - replace light queue
protected final LayerLightEventListener skyReader;
protected final LayerLightEventListener blockReader;
protected final boolean isClientSide;
- protected final int minSection;
- protected final int maxSection;
+ public final int minSection; // Paper - public
+ public final int maxSection; // Paper - public
protected final int minLightSection;
protected final int maxLightSection;
@@ -182,6 +182,7 @@ public final class StarLightInterface {
StarLightInterface.this.sectionChange(pos, notReady);
}
};
+ this.lightQueue = new io.papermc.paper.chunk.system.light.LightQueue(this); // Paper - replace light queue
}
protected int getSkyLightValue(final BlockPos blockPos, final ChunkAccess chunk) {
@@ -325,7 +326,7 @@ public final class StarLightInterface {
return this.lightAccess;
}
- protected final SkyStarLightEngine getSkyLightEngine() {
+ public final SkyStarLightEngine getSkyLightEngine() { // Paper - public
if (this.cachedSkyPropagators == null) {
return null;
}
@@ -340,7 +341,7 @@ public final class StarLightInterface {
return ret;
}
- protected final void releaseSkyLightEngine(final SkyStarLightEngine engine) {
+ public final void releaseSkyLightEngine(final SkyStarLightEngine engine) { // Paper - public
if (this.cachedSkyPropagators == null) {
return;
}
@@ -349,7 +350,7 @@ public final class StarLightInterface {
}
}
- protected final BlockStarLightEngine getBlockLightEngine() {
+ public final BlockStarLightEngine getBlockLightEngine() { // Paper - public
if (this.cachedBlockPropagators == null) {
return null;
}
@@ -364,7 +365,7 @@ public final class StarLightInterface {
return ret;
}
- protected final void releaseBlockLightEngine(final BlockStarLightEngine engine) {
+ public final void releaseBlockLightEngine(final BlockStarLightEngine engine) { // Paper - public
if (this.cachedBlockPropagators == null) {
return;
}
@@ -511,57 +512,15 @@ public final class StarLightInterface {
}
public void scheduleChunkLight(final ChunkPos pos, final Runnable run) {
- this.lightQueue.queueChunkLighting(pos, run);
+ throw new UnsupportedOperationException("No longer implemented, use the new lightQueue field to queue tasks"); // Paper - replace light queue
}
public void removeChunkTasks(final ChunkPos pos) {
- this.lightQueue.removeChunk(pos);
+ throw new UnsupportedOperationException("No longer implemented, use the new lightQueue field to queue tasks"); // Paper - replace light queue
}
public void propagateChanges() {
- if (this.lightQueue.isEmpty()) {
- return;
- }
-
- final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
- final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
-
- try {
- LightQueue.ChunkTasks task;
- while ((task = this.lightQueue.removeFirstTask()) != null) {
- if (task.lightTasks != null) {
- for (final Runnable run : task.lightTasks) {
- run.run();
- }
- }
-
- final long coordinate = task.chunkCoordinate;
- final int chunkX = CoordinateUtils.getChunkX(coordinate);
- final int chunkZ = CoordinateUtils.getChunkZ(coordinate);
-
- final Set<BlockPos> positions = task.changedPositions;
- final Boolean[] sectionChanges = task.changedSectionSet;
-
- if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) {
- skyEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges);
- }
- if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) {
- blockEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges);
- }
-
- if (skyEngine != null && task.queuedEdgeChecksSky != null) {
- skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksSky);
- }
- if (blockEngine != null && task.queuedEdgeChecksBlock != null) {
- blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksBlock);
- }
-
- task.onComplete.complete(null);
- }
- } finally {
- this.releaseSkyLightEngine(skyEngine);
- this.releaseBlockLightEngine(blockEngine);
- }
+ throw new UnsupportedOperationException("No longer implemented, task draining is now performed by the light thread"); // Paper - replace light queue
}
protected static final class LightQueue {
diff --git a/src/main/java/co/aikar/timings/TimingsExport.java b/src/main/java/co/aikar/timings/TimingsExport.java
index 46297ac0a19fd2398ab777a381eff4d0a256161e..98171f6c8e23f6ef89b897e4b80e3afb2a1950a0 100644
--- a/src/main/java/co/aikar/timings/TimingsExport.java
+++ b/src/main/java/co/aikar/timings/TimingsExport.java
@@ -162,7 +162,11 @@ public class TimingsExport extends Thread {
pair("gamerules", toObjectMapper(world.getWorld().getGameRules(), rule -> {
return pair(rule, world.getWorld().getGameRuleValue(rule));
})),
- pair("ticking-distance", world.getChunkSource().chunkMap.getEffectiveViewDistance())
+ // Paper start - replace chunk loader system
+ pair("ticking-distance", world.getChunkSource().chunkMap.playerChunkManager.getTargetTickViewDistance()),
+ pair("no-ticking-distance", world.getChunkSource().chunkMap.playerChunkManager.getTargetNoTickViewDistance()),
+ pair("sending-distance", world.getChunkSource().chunkMap.playerChunkManager.getTargetSendDistance())
+ // Paper end - replace chunk loader system
));
}));
diff --git a/src/main/java/co/aikar/timings/WorldTimingsHandler.java b/src/main/java/co/aikar/timings/WorldTimingsHandler.java
index 0fda52841b5e1643efeda92106124998abc4e0aa..fe79c0add4f7cb18d487c5bb9415c40c5b551ea2 100644
--- a/src/main/java/co/aikar/timings/WorldTimingsHandler.java
+++ b/src/main/java/co/aikar/timings/WorldTimingsHandler.java
@@ -58,6 +58,16 @@ public class WorldTimingsHandler {
public final Timing miscMobSpawning;
+ public final Timing poiUnload;
+ public final Timing chunkUnload;
+ public final Timing poiSaveDataSerialization;
+ public final Timing chunkSave;
+ public final Timing chunkSaveDataSerialization;
+ public final Timing chunkSaveIOWait;
+ public final Timing chunkUnloadPrepareSave;
+ public final Timing chunkUnloadPOISerialization;
+ public final Timing chunkUnloadDataSave;
+
public WorldTimingsHandler(Level server) {
String name = ((PrimaryLevelData) server.getLevelData()).getLevelName() + " - ";
@@ -111,6 +121,16 @@ public class WorldTimingsHandler {
miscMobSpawning = Timings.ofSafe(name + "Mob spawning - Misc");
+
+ poiUnload = Timings.ofSafe(name + "Chunk unload - POI");
+ chunkUnload = Timings.ofSafe(name + "Chunk unload - Chunk");
+ poiSaveDataSerialization = Timings.ofSafe(name + "Chunk save - POI Data serialization");
+ chunkSave = Timings.ofSafe(name + "Chunk save - Chunk");
+ chunkSaveDataSerialization = Timings.ofSafe(name + "Chunk save - Chunk Data serialization");
+ chunkSaveIOWait = Timings.ofSafe(name + "Chunk save - Chunk IO Wait");
+ chunkUnloadPrepareSave = Timings.ofSafe(name + "Chunk unload - Async Save Prepare");
+ chunkUnloadPOISerialization = Timings.ofSafe(name + "Chunk unload - POI Data Serialization");
+ chunkUnloadDataSave = Timings.ofSafe(name + "Chunk unload - Data Serialization");
}
public static Timing getTickList(ServerLevel worldserver, String timingsType) {
diff --git a/src/main/java/com/destroystokyo/paper/io/IOUtil.java b/src/main/java/com/destroystokyo/paper/io/IOUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..e064f96c90afd1a4890060baa055cfd0469b6a6f
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/IOUtil.java
@@ -0,0 +1,63 @@
+package com.destroystokyo.paper.io;
+
+import org.bukkit.Bukkit;
+
+@Deprecated(forRemoval = true)
+public final class IOUtil {
+
+ /* Copied from concrete or concurrentutil */
+
+ public static long getCoordinateKey(final int x, final int z) {
+ return ((long)z << 32) | (x & 0xFFFFFFFFL);
+ }
+
+ public static int getCoordinateX(final long key) {
+ return (int)key;
+ }
+
+ public static int getCoordinateZ(final long key) {
+ return (int)(key >>> 32);
+ }
+
+ public static int getRegionCoordinate(final int chunkCoordinate) {
+ return chunkCoordinate >> 5;
+ }
+
+ public static int getChunkInRegion(final int chunkCoordinate) {
+ return chunkCoordinate & 31;
+ }
+
+ public static String genericToString(final Object object) {
+ return object == null ? "null" : object.getClass().getName() + ":" + object.toString();
+ }
+
+ public static <T> T notNull(final T obj) {
+ if (obj == null) {
+ throw new NullPointerException();
+ }
+ return obj;
+ }
+
+ public static <T> T notNull(final T obj, final String msgIfNull) {
+ if (obj == null) {
+ throw new NullPointerException(msgIfNull);
+ }
+ return obj;
+ }
+
+ public static void arrayBounds(final int off, final int len, final int arrayLength, final String msgPrefix) {
+ if (off < 0 || len < 0 || (arrayLength - off) < len) {
+ throw new ArrayIndexOutOfBoundsException(msgPrefix + ": off: " + off + ", len: " + len + ", array length: " + arrayLength);
+ }
+ }
+
+ public static int getPriorityForCurrentThread() {
+ return Bukkit.isPrimaryThread() ? PrioritizedTaskQueue.HIGHEST_PRIORITY : PrioritizedTaskQueue.NORMAL_PRIORITY;
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T extends Throwable> void rethrow(final Throwable throwable) throws T {
+ throw (T)throwable;
+ }
+
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/PaperFileIOThread.java b/src/main/java/com/destroystokyo/paper/io/PaperFileIOThread.java
new file mode 100644
index 0000000000000000000000000000000000000000..f2c27e0ac65be4b75c1d86ef6fd45fdb538d96ac
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/PaperFileIOThread.java
@@ -0,0 +1,474 @@
+package com.destroystokyo.paper.io;
+
+import com.mojang.logging.LogUtils;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.storage.RegionFile;
+import org.slf4j.Logger;
+
+import java.io.IOException;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * Prioritized singleton thread responsible for all chunk IO that occurs in a minecraft server.
+ *
+ * <p>
+ * Singleton access: {@link Holder#INSTANCE}
+ * </p>
+ *
+ * <p>
+ * All functions provided are MT-Safe, however certain ordering constraints are (but not enforced):
+ * <li>
+ * Chunk saves may not occur for unloaded chunks.
+ * </li>
+ * <li>
+ * Tasks must be scheduled on the main thread.
+ * </li>
+ * </p>
+ *
+ * @see Holder#INSTANCE
+ * @see #scheduleSave(ServerLevel, int, int, CompoundTag, CompoundTag, int)
+ * @see #loadChunkDataAsync(ServerLevel, int, int, int, Consumer, boolean, boolean, boolean)
+ * @deprecated
+ */
+@Deprecated(forRemoval = true)
+public final class PaperFileIOThread extends QueueExecutorThread {
+
+ public static final Logger LOGGER = LogUtils.getLogger();
+ public static final CompoundTag FAILURE_VALUE = new CompoundTag();
+
+ public static final class Holder {
+
+ public static final PaperFileIOThread INSTANCE = new PaperFileIOThread();
+
+ static {
+ // Paper - fail hard on usage
+ }
+ }
+
+ private final AtomicLong writeCounter = new AtomicLong();
+
+ private PaperFileIOThread() {
+ super(new PrioritizedTaskQueue<>(), (int)(1.0e6)); // 1.0ms spinwait time
+ this.setName("Paper RegionFile IO Thread");
+ this.setPriority(Thread.NORM_PRIORITY - 1); // we keep priority close to normal because threads can wait on us
+ this.setUncaughtExceptionHandler((final Thread unused, final Throwable thr) -> {
+ LOGGER.error("Uncaught exception thrown from IO thread, report this!", thr);
+ });
+ }
+
+ /* run() is implemented by superclass */
+
+ /*
+ *
+ * IO thread will perform reads before writes
+ *
+ * How reads/writes are scheduled:
+ *
+ * If read in progress while scheduling write, ignore read and schedule write
+ * If read in progress while scheduling read (no write in progress), chain the read task
+ *
+ *
+ * If write in progress while scheduling read, use the pending write data and ret immediately
+ * If write in progress while scheduling write (ignore read in progress), overwrite the write in progress data
+ *
+ * This allows the reads and writes to act as if they occur synchronously to the thread scheduling them, however
+ * it fails to properly propagate write failures. When writes fail the data is kept so future reads will actually
+ * read the failed write data. This should hopefully act as a way to prevent data loss for spurious fails for writing data.
+ *
+ */
+
+ /**
+ * Attempts to bump the priority of all IO tasks for the given chunk coordinates. This has no effect if no tasks are queued.
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param priority Priority level to try to bump to
+ */
+ public void bumpPriority(final ServerLevel world, final int chunkX, final int chunkZ, final int priority) {
+ throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ }
+
+ public CompoundTag getPendingWrite(final ServerLevel world, final int chunkX, final int chunkZ, final boolean poiData) {
+ // Paper start - rewrite chunk system
+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.getPendingWrite(
+ world, chunkX, chunkZ, poiData ? io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA :
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA
+ );
+ // Paper end - rewrite chunk system
+ }
+
+ /**
+ * Sets the priority of all IO tasks for the given chunk coordinates. This has no effect if no tasks are queued.
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param priority Priority level to set to
+ */
+ public void setPriority(final ServerLevel world, final int chunkX, final int chunkZ, final int priority) {
+ throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ }
+
+ /**
+ * Schedules the chunk data to be written asynchronously.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means
+ * saves must be scheduled before a chunk is unloaded.
+ * </li>
+ * <li>
+ * Writes may be called concurrently, although only the "later" write will go through.
+ * </li>
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param poiData Chunk point of interest data. If {@code null}, then no poi data is saved.
+ * @param chunkData Chunk data. If {@code null}, then no chunk data is saved.
+ * @param priority Priority level for this task. See {@link PrioritizedTaskQueue}
+ * @throws IllegalArgumentException If both {@code poiData} and {@code chunkData} are {@code null}.
+ * @throws IllegalStateException If the file io thread has shutdown.
+ */
+ public void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ,
+ final CompoundTag poiData, final CompoundTag chunkData,
+ final int priority) throws IllegalArgumentException {
+ throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ }
+
+ private void scheduleWrite(final ChunkDataController dataController, final ServerLevel world,
+ final int chunkX, final int chunkZ, final CompoundTag data, final int priority, final long writeCounter) {
+ throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ }
+
+ /**
+ * Same as {@link #loadChunkDataAsync(ServerLevel, int, int, int, Consumer, boolean, boolean, boolean)}, except this function returns
+ * a {@link CompletableFuture} which is potentially completed <b>ASYNCHRONOUSLY ON THE FILE IO THREAD</b> when the load task
+ * has completed.
+ * <p>
+ * Note that if the chunk fails to load the returned future is completed with {@code null}.
+ * </p>
+ */
+ public CompletableFuture<ChunkData> loadChunkDataAsyncFuture(final ServerLevel world, final int chunkX, final int chunkZ,
+ final int priority, final boolean readPoiData, final boolean readChunkData,
+ final boolean intendingToBlock) {
+ final CompletableFuture<ChunkData> future = new CompletableFuture<>();
+ this.loadChunkDataAsync(world, chunkX, chunkZ, priority, future::complete, readPoiData, readChunkData, intendingToBlock);
+ return future;
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * If a chunk fails to load, the {@code onComplete} parameter is completed with {@code null}.
+ * </li>
+ * <li>
+ * It is possible for the {@code onComplete} parameter to be given {@link ChunkData} containing data
+ * this call did not request.
+ * </li>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param priority Priority level for this task. See {@link PrioritizedTaskQueue}
+ * @param onComplete Consumer to execute once this task has completed
+ * @param readPoiData Whether to read point of interest data. If {@code false}, the {@code NBTTagCompound} will be {@code null}.
+ * @param readChunkData Whether to read chunk data. If {@code false}, the {@code NBTTagCompound} will be {@code null}.
+ * @return The {@link PrioritizedTaskQueue.PrioritizedTask} associated with this task. Note that this task does not support
+ * cancellation.
+ */
+ public void loadChunkDataAsync(final ServerLevel world, final int chunkX, final int chunkZ,
+ final int priority, final Consumer<ChunkData> onComplete,
+ final boolean readPoiData, final boolean readChunkData,
+ final boolean intendingToBlock) {
+ if (!PrioritizedTaskQueue.validPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority: " + priority);
+ }
+
+ if (!(readPoiData | readChunkData)) {
+ throw new IllegalArgumentException("Must read chunk data or poi data");
+ }
+
+ final ChunkData complete = new ChunkData();
+ // Paper start - rewrite chunk system
+ final java.util.List<io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType> types = new java.util.ArrayList<>();
+ if (readPoiData) {
+ types.add(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA);
+ }
+ if (readChunkData) {
+ types.add(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA);
+ }
+ final ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority newPriority;
+ switch (priority) {
+ case PrioritizedTaskQueue.HIGHEST_PRIORITY -> newPriority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.BLOCKING;
+ case PrioritizedTaskQueue.HIGHER_PRIORITY -> newPriority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.HIGHEST;
+ case PrioritizedTaskQueue.HIGH_PRIORITY -> newPriority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.HIGH;
+ case PrioritizedTaskQueue.NORMAL_PRIORITY -> newPriority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.NORMAL;
+ case PrioritizedTaskQueue.LOW_PRIORITY -> newPriority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.LOW;
+ case PrioritizedTaskQueue.LOWEST_PRIORITY -> newPriority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.IDLE;
+ default -> throw new IllegalStateException("Legacy priority " + priority + " should be valid");
+ }
+ final Consumer<io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileData> transformComplete = (io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileData data) -> {
+ if (readPoiData) {
+ if (data.getThrowable(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA) != null) {
+ complete.poiData = FAILURE_VALUE;
+ } else {
+ complete.poiData = data.getData(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA);
+ }
+ }
+
+ if (readChunkData) {
+ if (data.getThrowable(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA) != null) {
+ complete.chunkData = FAILURE_VALUE;
+ } else {
+ complete.chunkData = data.getData(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA);
+ }
+ }
+
+ onComplete.accept(complete);
+ };
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, transformComplete, intendingToBlock, newPriority, types.toArray(new io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType[0]));
+ // Paper end - rewrite chunk system
+
+ }
+
+ // Note: the onComplete may be called asynchronously or synchronously here.
+ private void scheduleRead(final ChunkDataController dataController, final ServerLevel world,
+ final int chunkX, final int chunkZ, final Consumer<CompoundTag> onComplete, final int priority,
+ final boolean intendingToBlock) {
+ throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ }
+
+ /**
+ * Same as {@link #loadChunkDataAsync(ServerLevel, int, int, int, Consumer, boolean, boolean, boolean)}, except this function returns
+ * the {@link ChunkData} associated with the specified chunk when the task is complete.
+ * @return The chunk data, or {@code null} if the chunk failed to load.
+ */
+ public ChunkData loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ, final int priority,
+ final boolean readPoiData, final boolean readChunkData) {
+ return this.loadChunkDataAsyncFuture(world, chunkX, chunkZ, priority, readPoiData, readChunkData, true).join();
+ }
+
+ /**
+ * Schedules the given task at the specified priority to be executed on the IO thread.
+ * <p>
+ * Internal api. Do not use.
+ * </p>
+ */
+ public void runTask(final int priority, final Runnable runnable) {
+ throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ }
+
+ static final class GeneralTask extends PrioritizedTaskQueue.PrioritizedTask implements Runnable {
+
+ private final Runnable run;
+
+ public GeneralTask(final int priority, final Runnable run) {
+ super(priority);
+ this.run = IOUtil.notNull(run, "Task may not be null");
+ }
+
+ @Override
+ public void run() {
+ try {
+ this.run.run();
+ } catch (final Throwable throwable) {
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ LOGGER.error("Failed to execute general task on IO thread " + IOUtil.genericToString(this.run), throwable);
+ }
+ }
+ }
+
+ public static final class ChunkData {
+
+ public CompoundTag poiData;
+ public CompoundTag chunkData;
+
+ public ChunkData() {}
+
+ public ChunkData(final CompoundTag poiData, final CompoundTag chunkData) {
+ this.poiData = poiData;
+ this.chunkData = chunkData;
+ }
+ }
+
+ public static abstract class ChunkDataController {
+
+ // ConcurrentHashMap synchronizes per chain, so reduce the chance of task's hashes colliding.
+ public final ConcurrentHashMap<Long, ChunkDataTask> tasks = new ConcurrentHashMap<>(64, 0.5f);
+
+ public abstract void writeData(final int x, final int z, final CompoundTag compound) throws IOException;
+ public abstract CompoundTag readData(final int x, final int z) throws IOException;
+
+ public abstract <T> T computeForRegionFile(final int chunkX, final int chunkZ, final Function<RegionFile, T> function);
+ public abstract <T> T computeForRegionFileIfLoaded(final int chunkX, final int chunkZ, final Function<RegionFile, T> function);
+
+ public static final class InProgressWrite {
+ public long writeCounter;
+ public CompoundTag data;
+ }
+
+ public static final class InProgressRead {
+ public final CompletableFuture<CompoundTag> readFuture = new CompletableFuture<>();
+ }
+ }
+
+ public static final class ChunkDataTask extends PrioritizedTaskQueue.PrioritizedTask implements Runnable {
+
+ public ChunkDataController.InProgressWrite inProgressWrite;
+ public ChunkDataController.InProgressRead inProgressRead;
+
+ private final ServerLevel world;
+ private final int x;
+ private final int z;
+ private final ChunkDataController taskController;
+
+ public ChunkDataTask(final int priority, final ServerLevel world, final int x, final int z, final ChunkDataController taskController) {
+ super(priority);
+ this.world = world;
+ this.x = x;
+ this.z = z;
+ this.taskController = taskController;
+ }
+
+ @Override
+ public String toString() {
+ return "Task for world: '" + this.world.getWorld().getName() + "' at " + this.x + "," + this.z +
+ " poi: " + (this.taskController == null) + ", hash: " + this.hashCode(); // Paper - TODO rewrite chunk system
+ }
+
+ /*
+ *
+ * IO thread will perform reads before writes
+ *
+ * How reads/writes are scheduled:
+ *
+ * If read in progress while scheduling write, ignore read and schedule write
+ * If read in progress while scheduling read (no write in progress), chain the read task
+ *
+ *
+ * If write in progress while scheduling read, use the pending write data and ret immediately
+ * If write in progress while scheduling write (ignore read in progress), overwrite the write in progress data
+ *
+ * This allows the reads and writes to act as if they occur synchronously to the thread scheduling them, however
+ * it fails to properly propagate write failures
+ *
+ */
+
+ void reschedule(final int priority) {
+ // priority is checked before this stage // TODO what
+ this.queue.lazySet(null);
+ this.priority.lazySet(priority);
+ PaperFileIOThread.Holder.INSTANCE.queueTask(this);
+ }
+
+ @Override
+ public void run() {
+ if (true) throw new IllegalStateException("Shouldn't get here, use RegionFileIOThread"); // Paper - rewrite chunk system, fail hard on usage
+ ChunkDataController.InProgressRead read = this.inProgressRead;
+ if (read != null) {
+ CompoundTag compound = PaperFileIOThread.FAILURE_VALUE;
+ try {
+ compound = this.taskController.readData(this.x, this.z);
+ } catch (final Throwable thr) {
+ if (thr instanceof ThreadDeath) {
+ throw (ThreadDeath)thr;
+ }
+ LOGGER.error("Failed to read chunk data for task: " + this.toString(), thr);
+ // fall through to complete with null data
+ }
+ read.readFuture.complete(compound);
+ }
+
+ final Long chunkKey = Long.valueOf(IOUtil.getCoordinateKey(this.x, this.z));
+
+ ChunkDataController.InProgressWrite write = this.inProgressWrite;
+
+ if (write == null) {
+ // IntelliJ warns this is invalid, however it does not consider that writes to the task map & the inProgress field can occur concurrently.
+ ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final Long keyInMap, final ChunkDataTask valueInMap) -> {
+ if (valueInMap == null) {
+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!");
+ }
+ if (valueInMap != ChunkDataTask.this) {
+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!");
+ }
+ return valueInMap.inProgressWrite == null ? null : valueInMap;
+ });
+
+ if (inMap == null) {
+ return; // set the task value to null, indicating we're done
+ }
+
+ // not null, which means there was a concurrent write
+ write = this.inProgressWrite;
+ }
+
+ for (;;) {
+ final long writeCounter;
+ final CompoundTag data;
+
+ //noinspection SynchronizationOnLocalVariableOrMethodParameter
+ synchronized (write) {
+ writeCounter = write.writeCounter;
+ data = write.data;
+ }
+
+ boolean failedWrite = false;
+
+ try {
+ this.taskController.writeData(this.x, this.z, data);
+ } catch (final Throwable thr) {
+ if (thr instanceof ThreadDeath) {
+ throw (ThreadDeath)thr;
+ }
+ LOGGER.error("Failed to write chunk data for task: " + this.toString(), thr);
+ failedWrite = true;
+ }
+
+ boolean finalFailWrite = failedWrite;
+
+ ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final Long keyInMap, final ChunkDataTask valueInMap) -> {
+ if (valueInMap == null) {
+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!");
+ }
+ if (valueInMap != ChunkDataTask.this) {
+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!");
+ }
+ if (valueInMap.inProgressWrite.writeCounter == writeCounter) {
+ if (finalFailWrite) {
+ valueInMap.inProgressWrite.writeCounter = -1L;
+ }
+
+ return null;
+ }
+ return valueInMap;
+ // Hack end
+ });
+
+ if (inMap == null) {
+ // write counter matched, so we wrote the most up-to-date pending data, we're done here
+ // or we failed to write and successfully set the write counter to -1
+ return; // we're done here
+ }
+
+ // fetch & write new data
+ continue;
+ }
+ }
+ }
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/PrioritizedTaskQueue.java b/src/main/java/com/destroystokyo/paper/io/PrioritizedTaskQueue.java
new file mode 100644
index 0000000000000000000000000000000000000000..7844a3515430472bd829ff246396bceb0797de1b
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/PrioritizedTaskQueue.java
@@ -0,0 +1,299 @@
+package com.destroystokyo.paper.io;
+
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+@Deprecated(forRemoval = true)
+public class PrioritizedTaskQueue<T extends PrioritizedTaskQueue.PrioritizedTask> {
+
+ // lower numbers are a higher priority (except < 0)
+ // higher priorities are always executed before lower priorities
+
+ /**
+ * Priority value indicating the task has completed or is being completed.
+ */
+ public static final int COMPLETING_PRIORITY = -1;
+
+ /**
+ * Highest priority, should only be used for main thread tasks or tasks that are blocking the main thread.
+ */
+ public static final int HIGHEST_PRIORITY = 0;
+
+ /**
+ * Should be only used in an IO task so that chunk loads do not wait on other IO tasks.
+ * This only exists because IO tasks are scheduled before chunk load tasks to decrease IO waiting times.
+ */
+ public static final int HIGHER_PRIORITY = 1;
+
+ /**
+ * Should be used for scheduling chunk loads/generation that would increase response times to users.
+ */
+ public static final int HIGH_PRIORITY = 2;
+
+ /**
+ * Default priority.
+ */
+ public static final int NORMAL_PRIORITY = 3;
+
+ /**
+ * Use for tasks not at all critical and can potentially be delayed.
+ */
+ public static final int LOW_PRIORITY = 4;
+
+ /**
+ * Use for tasks that should "eventually" execute.
+ */
+ public static final int LOWEST_PRIORITY = 5;
+
+ private static final int TOTAL_PRIORITIES = 6;
+
+ final ConcurrentLinkedQueue<T>[] queues = (ConcurrentLinkedQueue<T>[])new ConcurrentLinkedQueue[TOTAL_PRIORITIES];
+
+ private final AtomicBoolean shutdown = new AtomicBoolean();
+
+ {
+ for (int i = 0; i < TOTAL_PRIORITIES; ++i) {
+ this.queues[i] = new ConcurrentLinkedQueue<>();
+ }
+ }
+
+ /**
+ * Returns whether the specified priority is valid
+ */
+ public static boolean validPriority(final int priority) {
+ return priority >= 0 && priority < TOTAL_PRIORITIES;
+ }
+
+ /**
+ * Queues a task.
+ * @throws IllegalStateException If the task has already been queued. Use {@link PrioritizedTask#raisePriority(int)} to
+ * raise a task's priority.
+ * This can also be thrown if the queue has shutdown.
+ */
+ public void add(final T task) throws IllegalStateException {
+ int priority = task.getPriority();
+ if (priority != COMPLETING_PRIORITY) {
+ task.setQueue(this);
+ this.queues[priority].add(task);
+ }
+ if (this.shutdown.get()) {
+ // note: we're not actually sure at this point if our task will go through
+ throw new IllegalStateException("Queue has shutdown, refusing to execute task " + IOUtil.genericToString(task));
+ }
+ }
+
+ /**
+ * Polls the highest priority task currently available. {@code null} if none.
+ */
+ public T poll() {
+ T task;
+ for (int i = 0; i < TOTAL_PRIORITIES; ++i) {
+ final ConcurrentLinkedQueue<T> queue = this.queues[i];
+
+ while ((task = queue.poll()) != null) {
+ final int prevPriority = task.tryComplete(i);
+ if (prevPriority != COMPLETING_PRIORITY && prevPriority <= i) {
+ // if the prev priority was greater-than or equal to our current priority
+ return task;
+ }
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Polls the highest priority task currently available. {@code null} if none.
+ */
+ public T poll(final int lowestPriority) {
+ T task;
+ final int max = Math.min(LOWEST_PRIORITY, lowestPriority);
+ for (int i = 0; i <= max; ++i) {
+ final ConcurrentLinkedQueue<T> queue = this.queues[i];
+
+ while ((task = queue.poll()) != null) {
+ final int prevPriority = task.tryComplete(i);
+ if (prevPriority != COMPLETING_PRIORITY && prevPriority <= i) {
+ // if the prev priority was greater-than or equal to our current priority
+ return task;
+ }
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Returns whether this queue may have tasks queued.
+ * <p>
+ * This operation is not atomic, but is MT-Safe.
+ * </p>
+ * @return {@code true} if tasks may be queued, {@code false} otherwise
+ */
+ public boolean hasTasks() {
+ for (int i = 0; i < TOTAL_PRIORITIES; ++i) {
+ final ConcurrentLinkedQueue<T> queue = this.queues[i];
+
+ if (queue.peek() != null) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Prevent further additions to this queue. Attempts to add after this call has completed (potentially during) will
+ * result in {@link IllegalStateException} being thrown.
+ * <p>
+ * This operation is atomic with respect to other shutdown calls
+ * </p>
+ * <p>
+ * After this call has completed, regardless of return value, this queue will be shutdown.
+ * </p>
+ * @return {@code true} if the queue was shutdown, {@code false} if it has shut down already
+ */
+ public boolean shutdown() {
+ return this.shutdown.getAndSet(false);
+ }
+
+ public abstract static class PrioritizedTask {
+
+ protected final AtomicReference<PrioritizedTaskQueue> queue = new AtomicReference<>();
+
+ protected final AtomicInteger priority;
+
+ protected PrioritizedTask() {
+ this(PrioritizedTaskQueue.NORMAL_PRIORITY);
+ }
+
+ protected PrioritizedTask(final int priority) {
+ if (!PrioritizedTaskQueue.validPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.priority = new AtomicInteger(priority);
+ }
+
+ /**
+ * Returns the current priority. Note that {@link PrioritizedTaskQueue#COMPLETING_PRIORITY} will be returned
+ * if this task is completing or has completed.
+ */
+ public final int getPriority() {
+ return this.priority.get();
+ }
+
+ /**
+ * Returns whether this task is scheduled to execute, or has been already executed.
+ */
+ public boolean isScheduled() {
+ return this.queue.get() != null;
+ }
+
+ final int tryComplete(final int minPriority) {
+ for (int curr = this.getPriorityVolatile();;) {
+ if (curr == COMPLETING_PRIORITY) {
+ return COMPLETING_PRIORITY;
+ }
+ if (curr > minPriority) {
+ // curr is lower priority
+ return curr;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, COMPLETING_PRIORITY))) {
+ return curr;
+ }
+ continue;
+ }
+ }
+
+ /**
+ * Forces this task to be completed.
+ * @return {@code true} if the task was cancelled, {@code false} if the task has already completed or is being completed.
+ */
+ public boolean cancel() {
+ return this.exchangePriorityVolatile(PrioritizedTaskQueue.COMPLETING_PRIORITY) != PrioritizedTaskQueue.COMPLETING_PRIORITY;
+ }
+
+ /**
+ * Attempts to raise the priority to the priority level specified.
+ * @param priority Priority specified
+ * @return {@code true} if successful, {@code false} otherwise.
+ */
+ public boolean raisePriority(final int priority) {
+ if (!PrioritizedTaskQueue.validPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority");
+ }
+
+ for (int curr = this.getPriorityVolatile();;) {
+ if (curr == COMPLETING_PRIORITY) {
+ return false;
+ }
+ if (priority >= curr) {
+ return true;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority))) {
+ PrioritizedTaskQueue queue = this.queue.get();
+ if (queue != null) {
+ //noinspection unchecked
+ queue.queues[priority].add(this); // silently fail on shutdown
+ }
+ return true;
+ }
+ continue;
+ }
+ }
+
+ /**
+ * Attempts to set this task's priority level to the level specified.
+ * @param priority Specified priority level.
+ * @return {@code true} if successful, {@code false} if this task is completing or has completed.
+ */
+ public boolean updatePriority(final int priority) {
+ if (!PrioritizedTaskQueue.validPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority");
+ }
+
+ for (int curr = this.getPriorityVolatile();;) {
+ if (curr == COMPLETING_PRIORITY) {
+ return false;
+ }
+ if (curr == priority) {
+ return true;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority))) {
+ PrioritizedTaskQueue queue = this.queue.get();
+ if (queue != null) {
+ //noinspection unchecked
+ queue.queues[priority].add(this); // silently fail on shutdown
+ }
+ return true;
+ }
+ continue;
+ }
+ }
+
+ void setQueue(final PrioritizedTaskQueue queue) {
+ this.queue.set(queue);
+ }
+
+ /* priority */
+
+ protected final int getPriorityVolatile() {
+ return this.priority.get();
+ }
+
+ protected final int compareAndExchangePriorityVolatile(final int expect, final int update) {
+ if (this.priority.compareAndSet(expect, update)) {
+ return expect;
+ }
+ return this.priority.get();
+ }
+
+ protected final int exchangePriorityVolatile(final int value) {
+ return this.priority.getAndSet(value);
+ }
+ }
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/QueueExecutorThread.java b/src/main/java/com/destroystokyo/paper/io/QueueExecutorThread.java
new file mode 100644
index 0000000000000000000000000000000000000000..99f49b5625cf51d6c97640553cf5c420bb6fdd36
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/QueueExecutorThread.java
@@ -0,0 +1,255 @@
+package com.destroystokyo.paper.io;
+
+import com.mojang.logging.LogUtils;
+import org.slf4j.Logger;
+
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.locks.LockSupport;
+
+@Deprecated(forRemoval = true)
+public class QueueExecutorThread<T extends PrioritizedTaskQueue.PrioritizedTask & Runnable> extends Thread {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+
+ protected final PrioritizedTaskQueue<T> queue;
+ protected final long spinWaitTime;
+
+ protected volatile boolean closed;
+
+ protected final AtomicBoolean parked = new AtomicBoolean();
+
+ protected volatile ConcurrentLinkedQueue<Thread> flushQueue = new ConcurrentLinkedQueue<>();
+ protected volatile long flushCycles;
+
+ protected int lowestPriorityToPoll = PrioritizedTaskQueue.LOWEST_PRIORITY;
+
+ public int getLowestPriorityToPoll() {
+ return this.lowestPriorityToPoll;
+ }
+
+ public void setLowestPriorityToPoll(final int lowestPriorityToPoll) {
+ if (this.isAlive()) {
+ throw new IllegalStateException("Cannot set after starting");
+ }
+ this.lowestPriorityToPoll = lowestPriorityToPoll;
+ }
+
+ public QueueExecutorThread(final PrioritizedTaskQueue<T> queue) {
+ this(queue, (int)(1.e6)); // 1.0ms
+ }
+
+ public QueueExecutorThread(final PrioritizedTaskQueue<T> queue, final long spinWaitTime) { // in ms
+ this.queue = queue;
+ this.spinWaitTime = spinWaitTime;
+ }
+
+ @Override
+ public void run() {
+ final long spinWaitTime = this.spinWaitTime;
+ main_loop:
+ for (;;) {
+ this.pollTasks(true);
+
+ // spinwait
+
+ final long start = System.nanoTime();
+
+ for (;;) {
+ // If we are interrpted for any reason, park() will always return immediately. Clear so that we don't needlessly use cpu in such an event.
+ Thread.interrupted();
+ LockSupport.parkNanos("Spinwaiting on tasks", 1000L); // 1us
+
+ if (this.pollTasks(true)) {
+ // restart loop, found tasks
+ continue main_loop;
+ }
+
+ if (this.handleClose()) {
+ return; // we're done
+ }
+
+ if ((System.nanoTime() - start) >= spinWaitTime) {
+ break;
+ }
+ }
+
+ if (this.handleClose()) {
+ return;
+ }
+
+ this.parked.set(true);
+
+ // We need to parse here to avoid a race condition where a thread queues a task before we set parked to true
+ // (i.e it will not notify us)
+ if (this.pollTasks(true)) {
+ this.parked.set(false);
+ continue;
+ }
+
+ if (this.handleClose()) {
+ return;
+ }
+
+ // we don't need to check parked before sleeping, but we do need to check parked in a do-while loop
+ // LockSupport.park() can fail for any reason
+ do {
+ Thread.interrupted();
+ LockSupport.park("Waiting on tasks");
+ } while (this.parked.get());
+ }
+ }
+
+ protected boolean handleClose() {
+ if (this.closed) {
+ this.pollTasks(true); // this ensures we've emptied the queue
+ this.handleFlushThreads(true);
+ return true;
+ }
+ return false;
+ }
+
+ protected boolean pollTasks(boolean flushTasks) {
+ Runnable task;
+ boolean ret = false;
+
+ while ((task = this.queue.poll(this.lowestPriorityToPoll)) != null) {
+ ret = true;
+ try {
+ task.run();
+ } catch (final Throwable throwable) {
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ LOGGER.error("Exception thrown from prioritized runnable task in thread '" + this.getName() + "': " + IOUtil.genericToString(task), throwable);
+ }
+ }
+
+ if (flushTasks) {
+ this.handleFlushThreads(false);
+ }
+
+ return ret;
+ }
+
+ protected void handleFlushThreads(final boolean shutdown) {
+ Thread parking;
+ ConcurrentLinkedQueue<Thread> flushQueue = this.flushQueue;
+ do {
+ ++flushCycles; // may be plain read opaque write
+ while ((parking = flushQueue.poll()) != null) {
+ LockSupport.unpark(parking);
+ }
+ } while (this.pollTasks(false));
+
+ if (shutdown) {
+ this.flushQueue = null;
+
+ // defend against a race condition where a flush thread double-checks right before we set to null
+ while ((parking = flushQueue.poll()) != null) {
+ LockSupport.unpark(parking);
+ }
+ }
+ }
+
+ /**
+ * Notify's this thread that a task has been added to its queue
+ * @return {@code true} if this thread was waiting for tasks, {@code false} if it is executing tasks
+ */
+ public boolean notifyTasks() {
+ if (this.parked.get() && this.parked.getAndSet(false)) {
+ LockSupport.unpark(this);
+ return true;
+ }
+ return false;
+ }
+
+ protected void queueTask(final T task) {
+ this.queue.add(task);
+ this.notifyTasks();
+ }
+
+ /**
+ * Waits until this thread's queue is empty.
+ *
+ * @throws IllegalStateException If the current thread is {@code this} thread.
+ */
+ public void flush() {
+ final Thread currentThread = Thread.currentThread();
+
+ if (currentThread == this) {
+ // avoid deadlock
+ throw new IllegalStateException("Cannot flush the queue executor thread while on the queue executor thread");
+ }
+
+ // order is important
+
+ int successes = 0;
+ long lastCycle = -1L;
+
+ do {
+ final ConcurrentLinkedQueue<Thread> flushQueue = this.flushQueue;
+ if (flushQueue == null) {
+ return;
+ }
+
+ flushQueue.add(currentThread);
+
+ // double check flush queue
+ if (this.flushQueue == null) {
+ return;
+ }
+
+ final long currentCycle = this.flushCycles; // may be opaque read
+
+ if (currentCycle == lastCycle) {
+ Thread.yield();
+ continue;
+ }
+
+ // force response
+ this.parked.set(false);
+ LockSupport.unpark(this);
+
+ LockSupport.park("flushing queue executor thread");
+
+ // returns whether there are tasks queued, does not return whether there are tasks executing
+ // this is why we cycle twice twice through flush (we know a pollTask call is made after a flush cycle)
+ // we really only need to guarantee that the tasks this thread has queued has gone through, and can leave
+ // tasks queued concurrently that are unsychronized with this thread as undefined behavior
+ if (this.queue.hasTasks()) {
+ successes = 0;
+ } else {
+ ++successes;
+ }
+
+ } while (successes != 2);
+
+ }
+
+ /**
+ * Closes this queue executor's queue and optionally waits for it to empty.
+ * <p>
+ * If wait is {@code true}, then the queue will be empty by the time this call completes.
+ * </p>
+ * <p>
+ * This function is MT-Safe.
+ * </p>
+ * @param wait If this call is to wait until the queue is empty
+ * @param killQueue Whether to shutdown this thread's queue
+ * @return whether this thread shut down the queue
+ */
+ public boolean close(final boolean wait, final boolean killQueue) {
+ boolean ret = !killQueue ? false : this.queue.shutdown();
+ this.closed = true;
+
+ // force thread to respond to the shutdown
+ this.parked.set(false);
+ LockSupport.unpark(this);
+
+ if (wait) {
+ this.flush();
+ }
+ return ret;
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java b/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java
new file mode 100644
index 0000000000000000000000000000000000000000..dd501e83d991e45598509134fab05bafc1904953
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java
@@ -0,0 +1,1128 @@
+package io.papermc.paper.chunk;
+
+import com.destroystokyo.paper.util.misc.PlayerAreaMap;
+import com.destroystokyo.paper.util.misc.PooledLinkedHashSets;
+import io.papermc.paper.configuration.GlobalConfiguration;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.IntervalledCounter;
+import io.papermc.paper.util.TickThread;
+import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
+import it.unimi.dsi.fastutil.objects.Reference2IntOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectLinkedOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ReferenceLinkedOpenHashSet;
+import net.minecraft.network.protocol.game.ClientboundSetChunkCacheCenterPacket;
+import net.minecraft.network.protocol.game.ClientboundSetChunkCacheRadiusPacket;
+import net.minecraft.network.protocol.game.ClientboundSetSimulationDistancePacket;
+import net.minecraft.server.MCUtil;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.*;
+import net.minecraft.util.Mth;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.LevelChunk;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.TreeSet;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public final class PlayerChunkLoader {
+
+ public static final int MIN_VIEW_DISTANCE = 2;
+ public static final int MAX_VIEW_DISTANCE = 32;
+
+ public static final int TICK_TICKET_LEVEL = 31;
+ public static final int LOADED_TICKET_LEVEL = 33;
+
+ public static int getTickViewDistance(final Player player) {
+ return getTickViewDistance(((CraftPlayer)player).getHandle());
+ }
+
+ public static int getTickViewDistance(final ServerPlayer player) {
+ final ServerLevel level = (ServerLevel)player.level;
+ final PlayerLoaderData data = level.chunkSource.chunkMap.playerChunkManager.getData(player);
+ if (data == null) {
+ return level.chunkSource.chunkMap.playerChunkManager.getTargetTickViewDistance();
+ }
+ return data.getTargetTickViewDistance();
+ }
+
+ public static int getLoadViewDistance(final Player player) {
+ return getLoadViewDistance(((CraftPlayer)player).getHandle());
+ }
+
+ public static int getLoadViewDistance(final ServerPlayer player) {
+ final ServerLevel level = (ServerLevel)player.level;
+ final PlayerLoaderData data = level.chunkSource.chunkMap.playerChunkManager.getData(player);
+ if (data == null) {
+ return level.chunkSource.chunkMap.playerChunkManager.getLoadDistance();
+ }
+ return data.getLoadDistance();
+ }
+
+ public static int getSendViewDistance(final Player player) {
+ return getSendViewDistance(((CraftPlayer)player).getHandle());
+ }
+
+ public static int getSendViewDistance(final ServerPlayer player) {
+ final ServerLevel level = (ServerLevel)player.level;
+ final PlayerLoaderData data = level.chunkSource.chunkMap.playerChunkManager.getData(player);
+ if (data == null) {
+ return level.chunkSource.chunkMap.playerChunkManager.getTargetSendDistance();
+ }
+ return data.getTargetSendViewDistance();
+ }
+
+ protected final ChunkMap chunkMap;
+ protected final Reference2ObjectLinkedOpenHashMap<ServerPlayer, PlayerLoaderData> playerMap = new Reference2ObjectLinkedOpenHashMap<>(512, 0.7f);
+ protected final ReferenceLinkedOpenHashSet<PlayerLoaderData> chunkSendQueue = new ReferenceLinkedOpenHashSet<>(512, 0.7f);
+
+ protected final TreeSet<PlayerLoaderData> chunkLoadQueue = new TreeSet<>((final PlayerLoaderData p1, final PlayerLoaderData p2) -> {
+ if (p1 == p2) {
+ return 0;
+ }
+
+ final ChunkPriorityHolder holder1 = p1.loadQueue.peekFirst();
+ final ChunkPriorityHolder holder2 = p2.loadQueue.peekFirst();
+
+ final int priorityCompare = Double.compare(holder1 == null ? Double.MAX_VALUE : holder1.priority, holder2 == null ? Double.MAX_VALUE : holder2.priority);
+
+ final int lastLoadTimeCompare = Long.compare(p1.lastChunkLoad, p2.lastChunkLoad);
+
+ if ((holder1 == null || holder2 == null || lastLoadTimeCompare == 0 || holder1.priority < 0.0 || holder2.priority < 0.0) && priorityCompare != 0) {
+ return priorityCompare;
+ }
+
+ if (lastLoadTimeCompare != 0) {
+ return lastLoadTimeCompare;
+ }
+
+ final int idCompare = Integer.compare(p1.player.getId(), p2.player.getId());
+
+ if (idCompare != 0) {
+ return idCompare;
+ }
+
+ // last resort
+ return Integer.compare(System.identityHashCode(p1), System.identityHashCode(p2));
+ });
+
+ protected final TreeSet<PlayerLoaderData> chunkSendWaitQueue = new TreeSet<>((final PlayerLoaderData p1, final PlayerLoaderData p2) -> {
+ if (p1 == p2) {
+ return 0;
+ }
+
+ final int timeCompare = Long.compare(p1.nextChunkSendTarget, p2.nextChunkSendTarget);
+ if (timeCompare != 0) {
+ return timeCompare;
+ }
+
+ final int idCompare = Integer.compare(p1.player.getId(), p2.player.getId());
+
+ if (idCompare != 0) {
+ return idCompare;
+ }
+
+ // last resort
+ return Integer.compare(System.identityHashCode(p1), System.identityHashCode(p2));
+ });
+
+
+ // no throttling is applied below this VD for loading
+
+ /**
+ * The chunks to be sent to players, provided they're send-ready. Send-ready means the chunk and its 1 radius neighbours are loaded.
+ */
+ public final PlayerAreaMap broadcastMap;
+
+ /**
+ * The chunks to be brought up to send-ready status. Send-ready means the chunk and its 1 radius neighbours are loaded.
+ */
+ public final PlayerAreaMap loadMap;
+
+ /**
+ * Areamap used only to remove tickets for send-ready chunks. View distance is always + 1 of load view distance. Thus,
+ * this map is always representing the chunks we are actually going to load.
+ */
+ public final PlayerAreaMap loadTicketCleanup;
+
+ /**
+ * The chunks to brought to ticking level. Each chunk must have 2 radius neighbours loaded before this can happen.
+ */
+ public final PlayerAreaMap tickMap;
+
+ /**
+ * -1 if defaulting to [load distance], else always in [2, load distance]
+ */
+ protected int rawSendDistance = -1;
+
+ /**
+ * -1 if defaulting to [tick view distance + 1], else always in [tick view distance + 1, 32 + 1]
+ */
+ protected int rawLoadDistance = -1;
+
+ /**
+ * Never -1, always in [2, 32]
+ */
+ protected int rawTickDistance = -1;
+
+ // methods to bridge for API
+
+ public int getTargetTickViewDistance() {
+ return this.getTickDistance();
+ }
+
+ public void setTargetTickViewDistance(final int distance) {
+ this.setTickDistance(distance);
+ }
+
+ public int getTargetNoTickViewDistance() {
+ return this.getLoadDistance() - 1;
+ }
+
+ public void setTargetNoTickViewDistance(final int distance) {
+ this.setLoadDistance(distance == -1 ? -1 : distance + 1);
+ }
+
+ public int getTargetSendDistance() {
+ return this.rawSendDistance == -1 ? this.getLoadDistance() : this.rawSendDistance;
+ }
+
+ public void setTargetSendDistance(final int distance) {
+ this.setSendDistance(distance);
+ }
+
+ // internal methods
+
+ public int getSendDistance() {
+ final int loadDistance = this.getLoadDistance();
+ return this.rawSendDistance == -1 ? loadDistance : Math.min(this.rawSendDistance, loadDistance);
+ }
+
+ public void setSendDistance(final int distance) {
+ if (distance != -1 && (distance < MIN_VIEW_DISTANCE || distance > MAX_VIEW_DISTANCE + 1)) {
+ throw new IllegalArgumentException("Send distance must be a number between " + MIN_VIEW_DISTANCE + " and " + (MAX_VIEW_DISTANCE + 1) + ", or -1, got: " + distance);
+ }
+ this.rawSendDistance = distance;
+ }
+
+ public int getLoadDistance() {
+ final int tickDistance = this.getTickDistance();
+ return this.rawLoadDistance == -1 ? tickDistance + 1 : Math.max(tickDistance + 1, this.rawLoadDistance);
+ }
+
+ public void setLoadDistance(final int distance) {
+ if (distance != -1 && (distance < MIN_VIEW_DISTANCE || distance > MAX_VIEW_DISTANCE + 1)) {
+ throw new IllegalArgumentException("Load distance must be a number between " + MIN_VIEW_DISTANCE + " and " + (MAX_VIEW_DISTANCE + 1) + ", or -1, got: " + distance);
+ }
+ this.rawLoadDistance = distance;
+ }
+
+ public int getTickDistance() {
+ return this.rawTickDistance;
+ }
+
+ public void setTickDistance(final int distance) {
+ if (distance < MIN_VIEW_DISTANCE || distance > MAX_VIEW_DISTANCE) {
+ throw new IllegalArgumentException("View distance must be a number between " + MIN_VIEW_DISTANCE + " and " + MAX_VIEW_DISTANCE + ", got: " + distance);
+ }
+ this.rawTickDistance = distance;
+ }
+
+ /*
+ Players have 3 different types of view distance:
+ 1. Sending view distance
+ 2. Loading view distance
+ 3. Ticking view distance
+
+ But for configuration purposes (and API) there are:
+ 1. No-tick view distance
+ 2. Tick view distance
+ 3. Broadcast view distance
+
+ These aren't always the same as the types we represent internally.
+
+ Loading view distance is always max(no-tick + 1, tick + 1)
+ - no-tick has 1 added because clients need an extra radius to render chunks
+ - tick has 1 added because it needs an extra radius of chunks to load before they can be marked ticking
+
+ Loading view distance is defined as the radius of chunks that will be brought to send-ready status, which means
+ it loads chunks in radius load-view-distance + 1.
+
+ The maximum value for send view distance is the load view distance. API can set it lower.
+ */
+
+ public PlayerChunkLoader(final ChunkMap chunkMap, final PooledLinkedHashSets<ServerPlayer> pooledHashSets) {
+ this.chunkMap = chunkMap;
+ this.broadcastMap = new PlayerAreaMap(pooledHashSets,
+ null,
+ (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+ PlayerChunkLoader.this.onChunkLeave(player, rangeX, rangeZ);
+ });
+ this.loadMap = new PlayerAreaMap(pooledHashSets,
+ null,
+ (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+ if (newState != null) {
+ return;
+ }
+ PlayerChunkLoader.this.isTargetedForPlayerLoad.remove(CoordinateUtils.getChunkKey(rangeX, rangeZ));
+ });
+ this.loadTicketCleanup = new PlayerAreaMap(pooledHashSets,
+ null,
+ (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+ if (newState != null) {
+ return;
+ }
+ ChunkPos chunkPos = new ChunkPos(rangeX, rangeZ);
+ PlayerChunkLoader.this.chunkMap.level.getChunkSource().removeTicketAtLevel(TicketType.PLAYER, chunkPos, LOADED_TICKET_LEVEL, chunkPos);
+ if (PlayerChunkLoader.this.chunkTicketTracker.remove(chunkPos.toLong())) {
+ --PlayerChunkLoader.this.concurrentChunkLoads;
+ }
+ });
+ this.tickMap = new PlayerAreaMap(pooledHashSets,
+ (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+ if (newState.size() != 1) {
+ return;
+ }
+ LevelChunk chunk = PlayerChunkLoader.this.chunkMap.level.getChunkSource().getChunkAtIfLoadedMainThreadNoCache(rangeX, rangeZ);
+ if (chunk == null || !chunk.areNeighboursLoaded(2)) {
+ return;
+ }
+
+ ChunkPos chunkPos = new ChunkPos(rangeX, rangeZ);
+ PlayerChunkLoader.this.chunkMap.level.getChunkSource().addTicketAtLevel(TicketType.PLAYER, chunkPos, TICK_TICKET_LEVEL, chunkPos);
+ },
+ (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+ if (newState != null) {
+ return;
+ }
+ ChunkPos chunkPos = new ChunkPos(rangeX, rangeZ);
+ PlayerChunkLoader.this.chunkMap.level.getChunkSource().removeTicketAtLevel(TicketType.PLAYER, chunkPos, TICK_TICKET_LEVEL, chunkPos);
+ });
+ }
+
+ protected final LongOpenHashSet isTargetedForPlayerLoad = new LongOpenHashSet();
+ protected final LongOpenHashSet chunkTicketTracker = new LongOpenHashSet();
+
+ public boolean isChunkNearPlayers(final int chunkX, final int chunkZ) {
+ final PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> playersInSendRange = this.broadcastMap.getObjectsInRange(chunkX, chunkZ);
+
+ return playersInSendRange != null;
+ }
+
+ public void onChunkPostProcessing(final int chunkX, final int chunkZ) {
+ this.onChunkSendReady(chunkX, chunkZ);
+ }
+
+ private boolean chunkNeedsPostProcessing(final int chunkX, final int chunkZ) {
+ final long key = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+ final ChunkHolder chunk = this.chunkMap.getVisibleChunkIfPresent(key);
+
+ if (chunk == null) {
+ return false;
+ }
+
+ final LevelChunk levelChunk = chunk.getSendingChunk();
+
+ return levelChunk != null && !levelChunk.isPostProcessingDone;
+ }
+
+ // rets whether the chunk is at a loaded stage that is ready to be sent to players
+ public boolean isChunkPlayerLoaded(final int chunkX, final int chunkZ) {
+ final long key = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+ final ChunkHolder chunk = this.chunkMap.getVisibleChunkIfPresent(key);
+
+ if (chunk == null) {
+ return false;
+ }
+
+ final LevelChunk levelChunk = chunk.getSendingChunk();
+
+ return levelChunk != null && levelChunk.isPostProcessingDone && this.isTargetedForPlayerLoad.contains(key);
+ }
+
+ public boolean isChunkSent(final ServerPlayer player, final int chunkX, final int chunkZ, final boolean borderOnly) {
+ return borderOnly ? this.isChunkSentBorderOnly(player, chunkX, chunkZ) : this.isChunkSent(player, chunkX, chunkZ);
+ }
+
+ public boolean isChunkSent(final ServerPlayer player, final int chunkX, final int chunkZ) {
+ final PlayerLoaderData data = this.playerMap.get(player);
+ if (data == null) {
+ return false;
+ }
+
+ return data.hasSentChunk(chunkX, chunkZ);
+ }
+
+ public boolean isChunkSentBorderOnly(final ServerPlayer player, final int chunkX, final int chunkZ) {
+ final PlayerLoaderData data = this.playerMap.get(player);
+ if (data == null) {
+ return false;
+ }
+
+ final boolean center = data.hasSentChunk(chunkX, chunkZ);
+ if (!center) {
+ return false;
+ }
+
+ return !(data.hasSentChunk(chunkX - 1, chunkZ) && data.hasSentChunk(chunkX + 1, chunkZ) &&
+ data.hasSentChunk(chunkX, chunkZ - 1) && data.hasSentChunk(chunkX, chunkZ + 1));
+ }
+
+ protected int getMaxConcurrentChunkSends() {
+ return GlobalConfiguration.get().chunkLoading.maxConcurrentSends;
+ }
+
+ protected int getMaxChunkLoads() {
+ double config = GlobalConfiguration.get().chunkLoading.playerMaxConcurrentLoads;
+ double max = GlobalConfiguration.get().chunkLoading.globalMaxConcurrentLoads;
+ return (int)Math.ceil(Math.min(config * MinecraftServer.getServer().getPlayerCount(), max <= 1.0 ? Double.MAX_VALUE : max));
+ }
+
+ protected long getTargetSendPerPlayerAddend() {
+ return GlobalConfiguration.get().chunkLoading.targetPlayerChunkSendRate <= 1.0 ? 0L : (long)Math.round(1.0e9 / GlobalConfiguration.get().chunkLoading.targetPlayerChunkSendRate);
+ }
+
+ protected long getMaxSendAddend() {
+ return GlobalConfiguration.get().chunkLoading.globalMaxChunkSendRate <= 1.0 ? 0L : (long)Math.round(1.0e9 / GlobalConfiguration.get().chunkLoading.globalMaxChunkSendRate);
+ }
+
+ public void onChunkPlayerTickReady(final int chunkX, final int chunkZ) {
+ final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ);
+ this.chunkMap.level.getChunkSource().addTicketAtLevel(TicketType.PLAYER, chunkPos, TICK_TICKET_LEVEL, chunkPos);
+ }
+
+ public void onChunkSendReady(final int chunkX, final int chunkZ) {
+ final PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> playersInSendRange = this.broadcastMap.getObjectsInRange(chunkX, chunkZ);
+
+ if (playersInSendRange == null) {
+ return;
+ }
+
+ final Object[] rawData = playersInSendRange.getBackingSet();
+ for (int i = 0, len = rawData.length; i < len; ++i) {
+ final Object raw = rawData[i];
+
+ if (!(raw instanceof ServerPlayer)) {
+ continue;
+ }
+ this.onChunkSendReady((ServerPlayer)raw, chunkX, chunkZ);
+ }
+ }
+
+ public void onChunkSendReady(final ServerPlayer player, final int chunkX, final int chunkZ) {
+ final PlayerLoaderData data = this.playerMap.get(player);
+
+ if (data == null) {
+ return;
+ }
+
+ if (data.hasSentChunk(chunkX, chunkZ) || !this.isChunkPlayerLoaded(chunkX, chunkZ)) {
+ // if we don't have player tickets, then the load logic will pick this up and queue to send
+ return;
+ }
+
+ if (!data.chunksToBeSent.remove(CoordinateUtils.getChunkKey(chunkX, chunkZ))) {
+ // don't queue to send, we don't want the chunk
+ return;
+ }
+
+ final long playerPos = this.broadcastMap.getLastCoordinate(player);
+ final int playerChunkX = CoordinateUtils.getChunkX(playerPos);
+ final int playerChunkZ = CoordinateUtils.getChunkZ(playerPos);
+ final int manhattanDistance = Math.abs(playerChunkX - chunkX) + Math.abs(playerChunkZ - chunkZ);
+
+ final ChunkPriorityHolder holder = new ChunkPriorityHolder(chunkX, chunkZ, manhattanDistance, 0.0);
+ data.sendQueue.add(holder);
+ }
+
+ public void onChunkLoad(final int chunkX, final int chunkZ) {
+ if (this.chunkTicketTracker.remove(CoordinateUtils.getChunkKey(chunkX, chunkZ))) {
+ --this.concurrentChunkLoads;
+ }
+ }
+
+ public void onChunkLeave(final ServerPlayer player, final int chunkX, final int chunkZ) {
+ final PlayerLoaderData data = this.playerMap.get(player);
+
+ if (data == null) {
+ return;
+ }
+
+ data.unloadChunk(chunkX, chunkZ);
+ }
+
+ public void addPlayer(final ServerPlayer player) {
+ TickThread.ensureTickThread("Cannot add player async");
+ if (!player.isRealPlayer) {
+ return;
+ }
+ final PlayerLoaderData data = new PlayerLoaderData(player, this);
+ if (this.playerMap.putIfAbsent(player, data) == null) {
+ data.update();
+ }
+ }
+
+ public void removePlayer(final ServerPlayer player) {
+ TickThread.ensureTickThread("Cannot remove player async");
+ if (!player.isRealPlayer) {
+ return;
+ }
+
+ final PlayerLoaderData loaderData = this.playerMap.remove(player);
+ if (loaderData == null) {
+ return;
+ }
+ loaderData.remove();
+ this.chunkLoadQueue.remove(loaderData);
+ this.chunkSendQueue.remove(loaderData);
+ this.chunkSendWaitQueue.remove(loaderData);
+ synchronized (this.sendingChunkCounts) {
+ final int count = this.sendingChunkCounts.removeInt(loaderData);
+ if (count != 0) {
+ concurrentChunkSends.getAndAdd(-count);
+ }
+ }
+ }
+
+ public void updatePlayer(final ServerPlayer player) {
+ TickThread.ensureTickThread("Cannot update player async");
+ if (!player.isRealPlayer) {
+ return;
+ }
+ final PlayerLoaderData loaderData = this.playerMap.get(player);
+ if (loaderData != null) {
+ loaderData.update();
+ }
+ }
+
+ public PlayerLoaderData getData(final ServerPlayer player) {
+ return this.playerMap.get(player);
+ }
+
+ public void tick() {
+ TickThread.ensureTickThread("Cannot tick async");
+ for (final PlayerLoaderData data : this.playerMap.values()) {
+ data.update();
+ }
+ this.tickMidTick();
+ }
+
+ protected static final AtomicInteger concurrentChunkSends = new AtomicInteger();
+ protected final Reference2IntOpenHashMap<PlayerLoaderData> sendingChunkCounts = new Reference2IntOpenHashMap<>();
+ private static long nextChunkSend;
+ private void trySendChunks() {
+ final long time = System.nanoTime();
+ if (time < nextChunkSend) {
+ return;
+ }
+ // drain entries from wait queue
+ while (!this.chunkSendWaitQueue.isEmpty()) {
+ final PlayerLoaderData data = this.chunkSendWaitQueue.first();
+
+ if (data.nextChunkSendTarget > time) {
+ break;
+ }
+
+ this.chunkSendWaitQueue.pollFirst();
+
+ this.chunkSendQueue.add(data);
+ }
+
+ if (this.chunkSendQueue.isEmpty()) {
+ return;
+ }
+
+ final int maxSends = this.getMaxConcurrentChunkSends();
+ final long nextPlayerDeadline = this.getTargetSendPerPlayerAddend() + time;
+ for (;;) {
+ if (this.chunkSendQueue.isEmpty()) {
+ break;
+ }
+ final int currSends = concurrentChunkSends.get();
+ if (currSends >= maxSends) {
+ break;
+ }
+
+ if (!concurrentChunkSends.compareAndSet(currSends, currSends + 1)) {
+ continue;
+ }
+
+ // send chunk
+
+ final PlayerLoaderData data = this.chunkSendQueue.removeFirst();
+
+ final ChunkPriorityHolder queuedSend = data.sendQueue.pollFirst();
+ if (queuedSend == null) {
+ concurrentChunkSends.getAndDecrement(); // we never sent, so decrease
+ // stop iterating over players who have nothing to send
+ if (this.chunkSendQueue.isEmpty()) {
+ // nothing left
+ break;
+ }
+ continue;
+ }
+
+ if (!this.isChunkPlayerLoaded(queuedSend.chunkX, queuedSend.chunkZ)) {
+ throw new IllegalStateException();
+ }
+
+ data.nextChunkSendTarget = nextPlayerDeadline;
+ this.chunkSendWaitQueue.add(data);
+
+ synchronized (this.sendingChunkCounts) {
+ this.sendingChunkCounts.addTo(data, 1);
+ }
+
+ data.sendChunk(queuedSend.chunkX, queuedSend.chunkZ, () -> {
+ synchronized (this.sendingChunkCounts) {
+ final int count = this.sendingChunkCounts.getInt(data);
+ if (count == 0) {
+ // disconnected, so we don't need to decrement: it will be decremented for us
+ return;
+ }
+ if (count == 1) {
+ this.sendingChunkCounts.removeInt(data);
+ } else {
+ this.sendingChunkCounts.put(data, count - 1);
+ }
+ }
+
+ concurrentChunkSends.getAndDecrement();
+ });
+
+ nextChunkSend = this.getMaxSendAddend() + time;
+ if (time < nextChunkSend) {
+ break;
+ }
+ }
+ }
+
+ protected int concurrentChunkLoads;
+ // this interval prevents bursting a lot of chunk loads
+ protected static final IntervalledCounter TICKET_ADDITION_COUNTER_SHORT = new IntervalledCounter((long)(1.0e6 * 50.0)); // 50ms
+ // this interval ensures the rate is kept between ticks correctly
+ protected static final IntervalledCounter TICKET_ADDITION_COUNTER_LONG = new IntervalledCounter((long)(1.0e6 * 1000.0)); // 1000ms
+ private void tryLoadChunks() {
+ if (this.chunkLoadQueue.isEmpty()) {
+ return;
+ }
+
+ final int maxLoads = this.getMaxChunkLoads();
+ final long time = System.nanoTime();
+ boolean updatedCounters = false;
+ for (;;) {
+ final PlayerLoaderData data = this.chunkLoadQueue.pollFirst();
+
+ data.lastChunkLoad = time;
+
+ final ChunkPriorityHolder queuedLoad = data.loadQueue.peekFirst();
+ if (queuedLoad == null) {
+ if (this.chunkLoadQueue.isEmpty()) {
+ break;
+ }
+ continue;
+ }
+
+ if (!updatedCounters) {
+ updatedCounters = true;
+ TICKET_ADDITION_COUNTER_SHORT.updateCurrentTime(time);
+ TICKET_ADDITION_COUNTER_LONG.updateCurrentTime(time);
+ data.ticketAdditionCounterShort.updateCurrentTime(time);
+ data.ticketAdditionCounterLong.updateCurrentTime(time);
+ }
+
+ if (this.isChunkPlayerLoaded(queuedLoad.chunkX, queuedLoad.chunkZ)) {
+ // already loaded!
+ data.loadQueue.pollFirst(); // already loaded so we just skip
+ this.chunkLoadQueue.add(data);
+
+ // ensure the chunk is queued to send
+ this.onChunkSendReady(queuedLoad.chunkX, queuedLoad.chunkZ);
+ continue;
+ }
+
+ final long chunkKey = CoordinateUtils.getChunkKey(queuedLoad.chunkX, queuedLoad.chunkZ);
+
+ final double priority = queuedLoad.priority;
+ // while we do need to rate limit chunk loads, the logic for sending chunks requires that tickets are present.
+ // when chunks are loaded (i.e spawn) but do not have this player's tickets, they have to wait behind the
+ // load queue. To avoid this problem, we check early here if tickets are required to load the chunk - if they
+ // aren't required, it bypasses the limiter system.
+ boolean unloadedTargetChunk = false;
+ unloaded_check:
+ for (int dz = -1; dz <= 1; ++dz) {
+ for (int dx = -1; dx <= 1; ++dx) {
+ final int offX = queuedLoad.chunkX + dx;
+ final int offZ = queuedLoad.chunkZ + dz;
+ if (this.chunkMap.level.getChunkSource().getChunkAtIfLoadedMainThreadNoCache(offX, offZ) == null) {
+ unloadedTargetChunk = true;
+ break unloaded_check;
+ }
+ }
+ }
+ if (unloadedTargetChunk && priority >= 0.0) {
+ // priority >= 0.0 implies rate limited chunks
+
+ final int currentChunkLoads = this.concurrentChunkLoads;
+ if (currentChunkLoads >= maxLoads || (GlobalConfiguration.get().chunkLoading.globalMaxChunkLoadRate > 0 && (TICKET_ADDITION_COUNTER_SHORT.getRate() >= GlobalConfiguration.get().chunkLoading.globalMaxChunkLoadRate || TICKET_ADDITION_COUNTER_LONG.getRate() >= GlobalConfiguration.get().chunkLoading.globalMaxChunkLoadRate))
+ || (GlobalConfiguration.get().chunkLoading.playerMaxChunkLoadRate > 0.0 && (data.ticketAdditionCounterShort.getRate() >= GlobalConfiguration.get().chunkLoading.playerMaxChunkLoadRate || data.ticketAdditionCounterLong.getRate() >= GlobalConfiguration.get().chunkLoading.playerMaxChunkLoadRate))) {
+ // don't poll, we didn't load it
+ this.chunkLoadQueue.add(data);
+ break;
+ }
+ }
+
+ // can only poll after we decide to load
+ data.loadQueue.pollFirst();
+
+ // now that we've polled we can re-add to load queue
+ this.chunkLoadQueue.add(data);
+
+ // add necessary tickets to load chunk up to send-ready
+ for (int dz = -1; dz <= 1; ++dz) {
+ for (int dx = -1; dx <= 1; ++dx) {
+ final int offX = queuedLoad.chunkX + dx;
+ final int offZ = queuedLoad.chunkZ + dz;
+ final ChunkPos chunkPos = new ChunkPos(offX, offZ);
+
+ this.chunkMap.level.getChunkSource().addTicketAtLevel(TicketType.PLAYER, chunkPos, LOADED_TICKET_LEVEL, chunkPos);
+ if (this.chunkMap.level.getChunkSource().getChunkAtIfLoadedMainThreadNoCache(offX, offZ) != null) {
+ continue;
+ }
+
+ if (priority > 0.0 && this.chunkTicketTracker.add(CoordinateUtils.getChunkKey(offX, offZ))) {
+ // won't reach here if unloadedTargetChunk is false
+ ++this.concurrentChunkLoads;
+ TICKET_ADDITION_COUNTER_SHORT.addTime(time);
+ TICKET_ADDITION_COUNTER_LONG.addTime(time);
+ data.ticketAdditionCounterShort.addTime(time);
+ data.ticketAdditionCounterLong.addTime(time);
+ }
+ }
+ }
+
+ // mark that we've added tickets here
+ this.isTargetedForPlayerLoad.add(chunkKey);
+
+ // it's possible all we needed was the player tickets to queue up the send.
+ if (this.isChunkPlayerLoaded(queuedLoad.chunkX, queuedLoad.chunkZ)) {
+ // yup, all we needed.
+ this.onChunkSendReady(queuedLoad.chunkX, queuedLoad.chunkZ);
+ } else if (this.chunkNeedsPostProcessing(queuedLoad.chunkX, queuedLoad.chunkZ)) {
+ // requires post processing
+ this.chunkMap.mainThreadExecutor.execute(() -> {
+ final long key = CoordinateUtils.getChunkKey(queuedLoad.chunkX, queuedLoad.chunkZ);
+ final ChunkHolder holder = PlayerChunkLoader.this.chunkMap.getVisibleChunkIfPresent(key);
+
+ if (holder == null) {
+ return;
+ }
+
+ final LevelChunk chunk = holder.getSendingChunk();
+
+ if (chunk != null && !chunk.isPostProcessingDone) {
+ chunk.postProcessGeneration();
+ }
+ });
+ }
+ }
+ }
+
+ public void tickMidTick() {
+ // try to send more chunks
+ this.trySendChunks();
+
+ // try to queue more chunks to load
+ this.tryLoadChunks();
+ }
+
+ static final class ChunkPriorityHolder {
+ public final int chunkX;
+ public final int chunkZ;
+ public final int manhattanDistanceToPlayer;
+ public final double priority;
+
+ public ChunkPriorityHolder(final int chunkX, final int chunkZ, final int manhattanDistanceToPlayer, final double priority) {
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.manhattanDistanceToPlayer = manhattanDistanceToPlayer;
+ this.priority = priority;
+ }
+ }
+
+ public static final class PlayerLoaderData {
+
+ protected static final float FOV = 110.0f;
+ protected static final double PRIORITISED_DISTANCE = 12.0 * 16.0;
+
+ // Player max sprint speed is approximately 8m/s
+ protected static final double LOOK_PRIORITY_SPEED_THRESHOLD = (10.0/20.0) * (10.0/20.0);
+ protected static final double LOOK_PRIORITY_YAW_DELTA_RECALC_THRESHOLD = 3.0f;
+
+ protected double lastLocX = Double.NEGATIVE_INFINITY;
+ protected double lastLocZ = Double.NEGATIVE_INFINITY;
+
+ protected int lastChunkX = Integer.MIN_VALUE;
+ protected int lastChunkZ = Integer.MIN_VALUE;
+
+ // this is corrected so that 0 is along the positive x-axis
+ protected float lastYaw = Float.NEGATIVE_INFINITY;
+
+ protected int lastSendDistance = Integer.MIN_VALUE;
+ protected int lastLoadDistance = Integer.MIN_VALUE;
+ protected int lastTickDistance = Integer.MIN_VALUE;
+ protected boolean usingLookingPriority;
+
+ protected final ServerPlayer player;
+ protected final PlayerChunkLoader loader;
+
+ // warning: modifications of this field must be aware that the loadQueue inside PlayerChunkLoader uses this field
+ // in a comparator!
+ protected final ArrayDeque<ChunkPriorityHolder> loadQueue = new ArrayDeque<>();
+ protected final LongOpenHashSet sentChunks = new LongOpenHashSet();
+ protected final LongOpenHashSet chunksToBeSent = new LongOpenHashSet();
+
+ protected final TreeSet<ChunkPriorityHolder> sendQueue = new TreeSet<>((final ChunkPriorityHolder p1, final ChunkPriorityHolder p2) -> {
+ final int distanceCompare = Integer.compare(p1.manhattanDistanceToPlayer, p2.manhattanDistanceToPlayer);
+ if (distanceCompare != 0) {
+ return distanceCompare;
+ }
+
+ final int coordinateXCompare = Integer.compare(p1.chunkX, p2.chunkX);
+ if (coordinateXCompare != 0) {
+ return coordinateXCompare;
+ }
+
+ return Integer.compare(p1.chunkZ, p2.chunkZ);
+ });
+
+ protected int sendViewDistance = -1;
+ protected int loadViewDistance = -1;
+ protected int tickViewDistance = -1;
+
+ protected long nextChunkSendTarget;
+
+ // this interval prevents bursting a lot of chunk loads
+ protected final IntervalledCounter ticketAdditionCounterShort = new IntervalledCounter((long)(1.0e6 * 50.0)); // 50ms
+ // this ensures the rate is kept between ticks correctly
+ protected final IntervalledCounter ticketAdditionCounterLong = new IntervalledCounter((long)(1.0e6 * 1000.0)); // 1000ms
+
+ public long lastChunkLoad;
+
+ public PlayerLoaderData(final ServerPlayer player, final PlayerChunkLoader loader) {
+ this.player = player;
+ this.loader = loader;
+ }
+
+ // these view distance methods are for api
+ public int getTargetSendViewDistance() {
+ final int tickViewDistance = this.tickViewDistance == -1 ? this.loader.getTickDistance() : this.tickViewDistance;
+ final int loadViewDistance = Math.max(tickViewDistance + 1, this.loadViewDistance == -1 ? this.loader.getLoadDistance() : this.loadViewDistance);
+ final int clientViewDistance = this.getClientViewDistance();
+ final int sendViewDistance = Math.min(loadViewDistance, this.sendViewDistance == -1 ? (!GlobalConfiguration.get().chunkLoading.autoconfigSendDistance || clientViewDistance == -1 ? this.loader.getSendDistance() : clientViewDistance + 1) : this.sendViewDistance);
+ return sendViewDistance;
+ }
+
+ public void setTargetSendViewDistance(final int distance) {
+ if (distance != -1 && (distance < MIN_VIEW_DISTANCE || distance > MAX_VIEW_DISTANCE + 1)) {
+ throw new IllegalArgumentException("Send view distance must be a number between " + MIN_VIEW_DISTANCE + " and " + (MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance);
+ }
+ this.sendViewDistance = distance;
+ }
+
+ public int getTargetNoTickViewDistance() {
+ return (this.loadViewDistance == -1 ? this.getLoadDistance() : this.loadViewDistance) - 1;
+ }
+
+ public void setTargetNoTickViewDistance(final int distance) {
+ if (distance != -1 && (distance < MIN_VIEW_DISTANCE || distance > MAX_VIEW_DISTANCE)) {
+ throw new IllegalArgumentException("Simulation distance must be a number between " + MIN_VIEW_DISTANCE + " and " + MAX_VIEW_DISTANCE + " or -1, got: " + distance);
+ }
+ this.loadViewDistance = distance == -1 ? -1 : distance + 1;
+ }
+
+ public int getTargetTickViewDistance() {
+ return this.tickViewDistance == -1 ? this.loader.getTickDistance() : this.tickViewDistance;
+ }
+
+ public void setTargetTickViewDistance(final int distance) {
+ if (distance != -1 && (distance < MIN_VIEW_DISTANCE || distance > MAX_VIEW_DISTANCE)) {
+ throw new IllegalArgumentException("View distance must be a number between " + MIN_VIEW_DISTANCE + " and " + MAX_VIEW_DISTANCE + " or -1, got: " + distance);
+ }
+ this.tickViewDistance = distance;
+ }
+
+ protected int getLoadDistance() {
+ final int tickViewDistance = this.tickViewDistance == -1 ? this.loader.getTickDistance() : this.tickViewDistance;
+
+ return Math.max(tickViewDistance + 1, this.loadViewDistance == -1 ? this.loader.getLoadDistance() : this.loadViewDistance);
+ }
+
+ public boolean hasSentChunk(final int chunkX, final int chunkZ) {
+ return this.sentChunks.contains(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+
+ public void sendChunk(final int chunkX, final int chunkZ, final Runnable onChunkSend) {
+ if (this.sentChunks.add(CoordinateUtils.getChunkKey(chunkX, chunkZ))) {
+ this.player.getLevel().getChunkSource().chunkMap.updateChunkTracking(this.player,
+ new ChunkPos(chunkX, chunkZ), new MutableObject<>(), false, true); // unloaded, loaded
+ this.player.connection.connection.execute(onChunkSend);
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public void unloadChunk(final int chunkX, final int chunkZ) {
+ if (this.sentChunks.remove(CoordinateUtils.getChunkKey(chunkX, chunkZ))) {
+ this.player.getLevel().getChunkSource().chunkMap.updateChunkTracking(this.player,
+ new ChunkPos(chunkX, chunkZ), null, true, false); // unloaded, loaded
+ }
+ }
+
+ protected static boolean wantChunkLoaded(final int centerX, final int centerZ, final int chunkX, final int chunkZ,
+ final int sendRadius) {
+ // expect sendRadius to be = 1 + target viewable radius
+ return ChunkMap.isChunkInRange(chunkX, chunkZ, centerX, centerZ, sendRadius);
+ }
+
+ protected static boolean triangleIntersects(final double p1x, final double p1z, // triangle point
+ final double p2x, final double p2z, // triangle point
+ final double p3x, final double p3z, // triangle point
+
+ final double targetX, final double targetZ) { // point
+ // from barycentric coordinates:
+ // targetX = a*p1x + b*p2x + c*p3x
+ // targetZ = a*p1z + b*p2z + c*p3z
+ // 1.0 = a*1.0 + b*1.0 + c*1.0
+ // where a, b, c >= 0.0
+ // so, if any of a, b, c are less-than zero then there is no intersection.
+
+ // d = ((p2z - p3z)(p1x - p3x) + (p3x - p2x)(p1z - p3z))
+ // a = ((p2z - p3z)(targetX - p3x) + (p3x - p2x)(targetZ - p3z)) / d
+ // b = ((p3z - p1z)(targetX - p3x) + (p1x - p3x)(targetZ - p3z)) / d
+ // c = 1.0 - a - b
+
+ final double d = (p2z - p3z)*(p1x - p3x) + (p3x - p2x)*(p1z - p3z);
+ final double a = ((p2z - p3z)*(targetX - p3x) + (p3x - p2x)*(targetZ - p3z)) / d;
+
+ if (a < 0.0 || a > 1.0) {
+ return false;
+ }
+
+ final double b = ((p3z - p1z)*(targetX - p3x) + (p1x - p3x)*(targetZ - p3z)) / d;
+ if (b < 0.0 || b > 1.0) {
+ return false;
+ }
+
+ final double c = 1.0 - a - b;
+
+ return c >= 0.0 && c <= 1.0;
+ }
+
+ public void remove() {
+ this.loader.broadcastMap.remove(this.player);
+ this.loader.loadMap.remove(this.player);
+ this.loader.loadTicketCleanup.remove(this.player);
+ this.loader.tickMap.remove(this.player);
+ }
+
+ protected int getClientViewDistance() {
+ return this.player.clientViewDistance == null ? -1 : Math.max(0, this.player.clientViewDistance.intValue());
+ }
+
+ public void update() {
+ final int tickViewDistance = this.tickViewDistance == -1 ? this.loader.getTickDistance() : this.tickViewDistance;
+ // load view cannot be less-than tick view + 1
+ final int loadViewDistance = Math.max(tickViewDistance + 1, this.loadViewDistance == -1 ? this.loader.getLoadDistance() : this.loadViewDistance);
+ // send view cannot be greater-than load view
+ final int clientViewDistance = this.getClientViewDistance();
+ final int sendViewDistance = Math.min(loadViewDistance, this.sendViewDistance == -1 ? (!GlobalConfiguration.get().chunkLoading.autoconfigSendDistance || clientViewDistance == -1 ? this.loader.getSendDistance() : clientViewDistance + 1) : this.sendViewDistance);
+
+ final double posX = this.player.getX();
+ final double posZ = this.player.getZ();
+ final float yaw = MCUtil.normalizeYaw(this.player.getYRot() + 90.0f); // mc yaw 0 is along the positive z axis, but obviously this is really dumb - offset so we are at positive x-axis
+
+ // in general, we really only want to prioritise chunks in front if we know we're moving pretty fast into them.
+ final boolean useLookPriority = GlobalConfiguration.get().chunkLoading.enableFrustumPriority && (this.player.getDeltaMovement().horizontalDistanceSqr() > LOOK_PRIORITY_SPEED_THRESHOLD ||
+ this.player.getAbilities().flying);
+
+ // make sure we're in the send queue
+ this.loader.chunkSendWaitQueue.add(this);
+
+ if (
+ // has view distance stayed the same?
+ sendViewDistance == this.lastSendDistance
+ && loadViewDistance == this.lastLoadDistance
+ && tickViewDistance == this.lastTickDistance
+
+ && (this.usingLookingPriority ? (
+ // has our block stayed the same (this also accounts for chunk change)?
+ Mth.floor(this.lastLocX) == Mth.floor(posX)
+ && Mth.floor(this.lastLocZ) == Mth.floor(posZ)
+ ) : (
+ // has our chunk stayed the same
+ (Mth.floor(this.lastLocX) >> 4) == (Mth.floor(posX) >> 4)
+ && (Mth.floor(this.lastLocZ) >> 4) == (Mth.floor(posZ) >> 4)
+ ))
+
+ // has our decision about look priority changed?
+ && this.usingLookingPriority == useLookPriority
+
+ // if we are currently using look priority, has our yaw stayed within recalc threshold?
+ && (!this.usingLookingPriority || Math.abs(yaw - this.lastYaw) <= LOOK_PRIORITY_YAW_DELTA_RECALC_THRESHOLD)
+ ) {
+ // nothing we care about changed, so we're not re-calculating
+ return;
+ }
+
+ final int centerChunkX = Mth.floor(posX) >> 4;
+ final int centerChunkZ = Mth.floor(posZ) >> 4;
+
+ final boolean needsChunkCenterUpdate = (centerChunkX != this.lastChunkX) || (centerChunkZ != this.lastChunkZ);
+ this.loader.broadcastMap.addOrUpdate(this.player, centerChunkX, centerChunkZ, sendViewDistance);
+ this.loader.loadMap.addOrUpdate(this.player, centerChunkX, centerChunkZ, loadViewDistance);
+ this.loader.loadTicketCleanup.addOrUpdate(this.player, centerChunkX, centerChunkZ, loadViewDistance + 1);
+ this.loader.tickMap.addOrUpdate(this.player, centerChunkX, centerChunkZ, tickViewDistance);
+
+ if (sendViewDistance != this.lastSendDistance) {
+ // update the view radius for client
+ // note that this should be after the map calls because the client wont expect unload calls not in its VD
+ // and it's possible we decreased VD here
+ this.player.connection.send(new ClientboundSetChunkCacheRadiusPacket(sendViewDistance));
+ }
+ if (tickViewDistance != this.lastTickDistance) {
+ this.player.connection.send(new ClientboundSetSimulationDistancePacket(tickViewDistance));
+ }
+
+ this.lastLocX = posX;
+ this.lastLocZ = posZ;
+ this.lastYaw = yaw;
+ this.lastSendDistance = sendViewDistance;
+ this.lastLoadDistance = loadViewDistance;
+ this.lastTickDistance = tickViewDistance;
+ this.usingLookingPriority = useLookPriority;
+
+ this.lastChunkX = centerChunkX;
+ this.lastChunkZ = centerChunkZ;
+
+ // points for player "view" triangle:
+
+ // obviously, the player pos is a vertex
+ final double p1x = posX;
+ final double p1z = posZ;
+
+ // to the left of the looking direction
+ final double p2x = PRIORITISED_DISTANCE * Math.cos(Math.toRadians(yaw + (double)(FOV / 2.0))) // calculate rotated vector
+ + p1x; // offset vector
+ final double p2z = PRIORITISED_DISTANCE * Math.sin(Math.toRadians(yaw + (double)(FOV / 2.0))) // calculate rotated vector
+ + p1z; // offset vector
+
+ // to the right of the looking direction
+ final double p3x = PRIORITISED_DISTANCE * Math.cos(Math.toRadians(yaw - (double)(FOV / 2.0))) // calculate rotated vector
+ + p1x; // offset vector
+ final double p3z = PRIORITISED_DISTANCE * Math.sin(Math.toRadians(yaw - (double)(FOV / 2.0))) // calculate rotated vector
+ + p1z; // offset vector
+
+ // now that we have all of our points, we can recalculate the load queue
+
+ final List<ChunkPriorityHolder> loadQueue = new ArrayList<>();
+
+ // clear send queue, we are re-sorting
+ this.sendQueue.clear();
+ // clear chunk want set, vd/position might have changed
+ this.chunksToBeSent.clear();
+
+ final int searchViewDistance = Math.max(loadViewDistance, sendViewDistance);
+
+ for (int dx = -searchViewDistance; dx <= searchViewDistance; ++dx) {
+ for (int dz = -searchViewDistance; dz <= searchViewDistance; ++dz) {
+ final int chunkX = dx + centerChunkX;
+ final int chunkZ = dz + centerChunkZ;
+ final int squareDistance = Math.max(Math.abs(dx), Math.abs(dz));
+ final boolean sendChunk = squareDistance <= sendViewDistance && wantChunkLoaded(centerChunkX, centerChunkZ, chunkX, chunkZ, sendViewDistance);
+
+ if (this.hasSentChunk(chunkX, chunkZ)) {
+ // already sent (which means it is also loaded)
+ if (!sendChunk) {
+ // have sent the chunk, but don't want it anymore
+ // unload it now
+ this.unloadChunk(chunkX, chunkZ);
+ }
+ continue;
+ }
+
+ final boolean loadChunk = squareDistance <= loadViewDistance;
+
+ final boolean prioritised = useLookPriority && triangleIntersects(
+ // prioritisation triangle
+ p1x, p1z, p2x, p2z, p3x, p3z,
+
+ // center of chunk
+ (double)((chunkX << 4) | 8), (double)((chunkZ << 4) | 8)
+ );
+
+ final int manhattanDistance = Math.abs(dx) + Math.abs(dz);
+
+ final double priority;
+
+ if (squareDistance <= GlobalConfiguration.get().chunkLoading.minLoadRadius) {
+ // priority should be negative, and we also want to order it from center outwards
+ // so we want (0,0) to be the smallest, and (minLoadedRadius,minLoadedRadius) to be the greatest
+ priority = -((2 * GlobalConfiguration.get().chunkLoading.minLoadRadius + 1) - manhattanDistance);
+ } else {
+ if (prioritised) {
+ // we don't prioritise these chunks above others because we also want to make sure some chunks
+ // will be loaded if the player changes direction
+ priority = (double)manhattanDistance / 6.0;
+ } else {
+ priority = (double)manhattanDistance;
+ }
+ }
+
+ final ChunkPriorityHolder holder = new ChunkPriorityHolder(chunkX, chunkZ, manhattanDistance, priority);
+
+ if (!this.loader.isChunkPlayerLoaded(chunkX, chunkZ)) {
+ if (loadChunk) {
+ loadQueue.add(holder);
+ if (sendChunk) {
+ this.chunksToBeSent.add(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+ }
+ } else {
+ // loaded but not sent: so queue it!
+ if (sendChunk) {
+ this.sendQueue.add(holder);
+ }
+ }
+ }
+ }
+
+ loadQueue.sort((final ChunkPriorityHolder p1, final ChunkPriorityHolder p2) -> {
+ return Double.compare(p1.priority, p2.priority);
+ });
+
+ // we're modifying loadQueue, must remove
+ this.loader.chunkLoadQueue.remove(this);
+
+ this.loadQueue.clear();
+ this.loadQueue.addAll(loadQueue);
+
+ // must re-add
+ this.loader.chunkLoadQueue.add(this);
+
+ // update the chunk center
+ // this must be done last so that the client does not ignore any of our unload chunk packets
+ if (needsChunkCenterUpdate) {
+ this.player.connection.send(new ClientboundSetChunkCacheCenterPacket(centerChunkX, centerChunkZ));
+ }
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java
new file mode 100644
index 0000000000000000000000000000000000000000..7d37b2b02dd64acdac7e5981bebcf988e2f5a7c1
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java
@@ -0,0 +1,839 @@
+package io.papermc.paper.chunk.system.entity;
+
+import com.destroystokyo.paper.util.maplist.EntityList;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import io.papermc.paper.util.WorldUtil;
+import io.papermc.paper.world.ChunkEntitySlices;
+import it.unimi.dsi.fastutil.ints.Int2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Object2ReferenceOpenHashMap;
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.ChunkSystem;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.util.Mth;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.level.entity.EntityInLevelCallback;
+import net.minecraft.world.level.entity.EntityTypeTest;
+import net.minecraft.world.level.entity.LevelCallback;
+import net.minecraft.world.level.entity.LevelEntityGetter;
+import net.minecraft.world.level.entity.Visibility;
+import net.minecraft.world.phys.AABB;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.slf4j.Logger;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.UUID;
+import java.util.concurrent.locks.StampedLock;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+public final class EntityLookup implements LevelEntityGetter<Entity> {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ protected static final int REGION_SHIFT = 5;
+ protected static final int REGION_MASK = (1 << REGION_SHIFT) - 1;
+ protected static final int REGION_SIZE = 1 << REGION_SHIFT;
+
+ public final ServerLevel world;
+
+ private final StampedLock stateLock = new StampedLock();
+ protected final Long2ObjectOpenHashMap<ChunkSlicesRegion> regions = new Long2ObjectOpenHashMap<>(128, 0.5f);
+
+ private final int minSection; // inclusive
+ private final int maxSection; // inclusive
+ private final LevelCallback<Entity> worldCallback;
+
+ private final StampedLock entityByLock = new StampedLock();
+ private final Int2ReferenceOpenHashMap<Entity> entityById = new Int2ReferenceOpenHashMap<>();
+ private final Object2ReferenceOpenHashMap<UUID, Entity> entityByUUID = new Object2ReferenceOpenHashMap<>();
+ private final EntityList accessibleEntities = new EntityList();
+
+ public EntityLookup(final ServerLevel world, final LevelCallback<Entity> worldCallback) {
+ this.world = world;
+ this.minSection = WorldUtil.getMinSection(world);
+ this.maxSection = WorldUtil.getMaxSection(world);
+ this.worldCallback = worldCallback;
+ }
+
+ private static Entity maskNonAccessible(final Entity entity) {
+ if (entity == null) {
+ return null;
+ }
+ final Visibility visibility = EntityLookup.getEntityStatus(entity);
+ return visibility.isAccessible() ? entity : null;
+ }
+
+ @Nullable
+ @Override
+ public Entity get(final int id) {
+ final long attempt = this.entityByLock.tryOptimisticRead();
+ if (attempt != 0L) {
+ try {
+ final Entity ret = this.entityById.get(id);
+
+ if (this.entityByLock.validate(attempt)) {
+ return maskNonAccessible(ret);
+ }
+ } catch (final Error error) {
+ throw error;
+ } catch (final Throwable thr) {
+ // ignore
+ }
+ }
+
+ this.entityByLock.readLock();
+ try {
+ return maskNonAccessible(this.entityById.get(id));
+ } finally {
+ this.entityByLock.tryUnlockRead();
+ }
+ }
+
+ @Nullable
+ @Override
+ public Entity get(final UUID id) {
+ final long attempt = this.entityByLock.tryOptimisticRead();
+ if (attempt != 0L) {
+ try {
+ final Entity ret = this.entityByUUID.get(id);
+
+ if (this.entityByLock.validate(attempt)) {
+ return maskNonAccessible(ret);
+ }
+ } catch (final Error error) {
+ throw error;
+ } catch (final Throwable thr) {
+ // ignore
+ }
+ }
+
+ this.entityByLock.readLock();
+ try {
+ return maskNonAccessible(this.entityByUUID.get(id));
+ } finally {
+ this.entityByLock.tryUnlockRead();
+ }
+ }
+
+ public boolean hasEntity(final UUID uuid) {
+ return this.get(uuid) != null;
+ }
+
+ public String getDebugInfo() {
+ return "count_id:" + this.entityById.size() + ",count_uuid:" + this.entityByUUID.size() + ",region_count:" + this.regions.size();
+ }
+
+ static final class ArrayIterable<T> implements Iterable<T> {
+
+ private final T[] array;
+ private final int off;
+ private final int length;
+
+ public ArrayIterable(final T[] array, final int off, final int length) {
+ this.array = array;
+ this.off = off;
+ this.length = length;
+ if (length > array.length) {
+ throw new IllegalArgumentException("Length must be no greater-than the array length");
+ }
+ }
+
+ @NotNull
+ @Override
+ public Iterator<T> iterator() {
+ return new ArrayIterator<>(this.array, this.off, this.length);
+ }
+
+ static final class ArrayIterator<T> implements Iterator<T> {
+
+ private final T[] array;
+ private int off;
+ private final int length;
+
+ public ArrayIterator(final T[] array, final int off, final int length) {
+ this.array = array;
+ this.off = off;
+ this.length = length;
+ }
+
+ @Override
+ public boolean hasNext() {
+ return this.off < this.length;
+ }
+
+ @Override
+ public T next() {
+ if (this.off >= this.length) {
+ throw new NoSuchElementException();
+ }
+ return this.array[this.off++];
+ }
+
+ @Override
+ public void remove() {
+ throw new UnsupportedOperationException();
+ }
+ }
+ }
+
+ @Override
+ public Iterable<Entity> getAll() {
+ return new ArrayIterable<>(this.accessibleEntities.getRawData(), 0, this.accessibleEntities.size());
+ }
+
+ @Override
+ public <U extends Entity> void get(final EntityTypeTest<Entity, U> filter, final Consumer<U> action) {
+ for (final Entity entity : this.entityById.values()) {
+ final Visibility visibility = EntityLookup.getEntityStatus(entity);
+ if (!visibility.isAccessible()) {
+ continue;
+ }
+ final U casted = filter.tryCast(entity);
+ if (casted != null) {
+ action.accept(casted);
+ }
+ }
+ }
+
+ @Override
+ public void get(final AABB box, final Consumer<Entity> action) {
+ List<Entity> entities = new ArrayList<>();
+ this.getEntitiesWithoutDragonParts(null, box, entities, null);
+ for (int i = 0, len = entities.size(); i < len; ++i) {
+ action.accept(entities.get(i));
+ }
+ }
+
+ @Override
+ public <U extends Entity> void get(final EntityTypeTest<Entity, U> filter, final AABB box, final Consumer<U> action) {
+ List<Entity> entities = new ArrayList<>();
+ this.getEntitiesWithoutDragonParts(null, box, entities, null);
+ for (int i = 0, len = entities.size(); i < len; ++i) {
+ final U casted = filter.tryCast(entities.get(i));
+ if (casted != null) {
+ action.accept(casted);
+ }
+ }
+ }
+
+ public void entityStatusChange(final Entity entity, final ChunkEntitySlices slices, final Visibility oldVisibility, final Visibility newVisibility, final boolean moved,
+ final boolean created, final boolean destroyed) {
+ TickThread.ensureTickThread(entity, "Entity status change must only happen on the main thread");
+
+ if (entity.updatingSectionStatus) {
+ // recursive status update
+ LOGGER.error("Cannot recursively update entity chunk status for entity " + entity, new Throwable());
+ return;
+ }
+
+ final boolean entityStatusUpdateBefore = slices == null ? false : slices.startPreventingStatusUpdates();
+
+ if (entityStatusUpdateBefore) {
+ LOGGER.error("Cannot update chunk status for entity " + entity + " since entity chunk (" + slices.chunkX + "," + slices.chunkZ + ") is receiving update", new Throwable());
+ return;
+ }
+
+ try {
+ final Boolean ticketBlockBefore = this.world.chunkTaskScheduler.chunkHolderManager.blockTicketUpdates();
+ try {
+ entity.updatingSectionStatus = true;
+ try {
+ if (created) {
+ EntityLookup.this.worldCallback.onCreated(entity);
+ }
+
+ if (oldVisibility == newVisibility) {
+ if (moved && newVisibility.isAccessible()) {
+ EntityLookup.this.worldCallback.onSectionChange(entity);
+ }
+ return;
+ }
+
+ if (newVisibility.ordinal() > oldVisibility.ordinal()) {
+ // status upgrade
+ if (!oldVisibility.isAccessible() && newVisibility.isAccessible()) {
+ this.accessibleEntities.add(entity);
+ EntityLookup.this.worldCallback.onTrackingStart(entity);
+ }
+
+ if (!oldVisibility.isTicking() && newVisibility.isTicking()) {
+ EntityLookup.this.worldCallback.onTickingStart(entity);
+ }
+ } else {
+ // status downgrade
+ if (oldVisibility.isTicking() && !newVisibility.isTicking()) {
+ EntityLookup.this.worldCallback.onTickingEnd(entity);
+ }
+
+ if (oldVisibility.isAccessible() && !newVisibility.isAccessible()) {
+ this.accessibleEntities.remove(entity);
+ EntityLookup.this.worldCallback.onTrackingEnd(entity);
+ }
+ }
+
+ if (moved && newVisibility.isAccessible()) {
+ EntityLookup.this.worldCallback.onSectionChange(entity);
+ }
+
+ if (destroyed) {
+ EntityLookup.this.worldCallback.onDestroyed(entity);
+ }
+ } finally {
+ entity.updatingSectionStatus = false;
+ }
+ } finally {
+ this.world.chunkTaskScheduler.chunkHolderManager.unblockTicketUpdates(ticketBlockBefore);
+ }
+ } finally {
+ if (slices != null) {
+ slices.stopPreventingStatusUpdates(false);
+ }
+ }
+ }
+
+ public void chunkStatusChange(final int x, final int z, final ChunkHolder.FullChunkStatus newStatus) {
+ this.getChunk(x, z).updateStatus(newStatus, this);
+ }
+
+ public void addLegacyChunkEntities(final List<Entity> entities) {
+ for (int i = 0, len = entities.size(); i < len; ++i) {
+ this.addEntity(entities.get(i), true);
+ }
+ }
+
+ public void addEntityChunkEntities(final List<Entity> entities) {
+ for (int i = 0, len = entities.size(); i < len; ++i) {
+ this.addEntity(entities.get(i), true);
+ }
+ }
+
+ public void addWorldGenChunkEntities(final List<Entity> entities) {
+ for (int i = 0, len = entities.size(); i < len; ++i) {
+ this.addEntity(entities.get(i), false);
+ }
+ }
+
+ public boolean addNewEntity(final Entity entity) {
+ return this.addEntity(entity, false);
+ }
+
+ public static Visibility getEntityStatus(final Entity entity) {
+ if (entity.isAlwaysTicking()) {
+ return Visibility.TICKING;
+ }
+ final ChunkHolder.FullChunkStatus entityStatus = entity.chunkStatus;
+ return Visibility.fromFullChunkStatus(entityStatus == null ? ChunkHolder.FullChunkStatus.INACCESSIBLE : entityStatus);
+ }
+
+ private boolean addEntity(final Entity entity, final boolean fromDisk) {
+ final BlockPos pos = entity.blockPosition();
+ final int sectionX = pos.getX() >> 4;
+ final int sectionY = Mth.clamp(pos.getY() >> 4, this.minSection, this.maxSection);
+ final int sectionZ = pos.getZ() >> 4;
+ TickThread.ensureTickThread(this.world, sectionX, sectionZ, "Cannot add entity off-main thread");
+
+ if (entity.isRemoved()) {
+ LOGGER.warn("Refusing to add removed entity: " + entity);
+ return false;
+ }
+
+ if (entity.updatingSectionStatus) {
+ LOGGER.warn("Entity " + entity + " is currently prevented from being added/removed to world since it is processing section status updates", new Throwable());
+ return false;
+ }
+
+ if (fromDisk) {
+ ChunkSystem.onEntityPreAdd(this.world, entity);
+ if (entity.isRemoved()) {
+ // removed from checkDupeUUID call
+ return false;
+ }
+ }
+
+ this.entityByLock.writeLock();
+ try {
+ if (this.entityById.containsKey(entity.getId())) {
+ LOGGER.warn("Entity id already exists: " + entity.getId() + ", mapped to " + this.entityById.get(entity.getId()) + ", can't add " + entity);
+ return false;
+ }
+ if (this.entityByUUID.containsKey(entity.getUUID())) {
+ LOGGER.warn("Entity uuid already exists: " + entity.getUUID() + ", mapped to " + this.entityByUUID.get(entity.getUUID()) + ", can't add " + entity);
+ return false;
+ }
+ this.entityById.put(entity.getId(), entity);
+ this.entityByUUID.put(entity.getUUID(), entity);
+ } finally {
+ this.entityByLock.tryUnlockWrite();
+ }
+
+ entity.sectionX = sectionX;
+ entity.sectionY = sectionY;
+ entity.sectionZ = sectionZ;
+ final ChunkEntitySlices slices = this.getOrCreateChunk(sectionX, sectionZ);
+ if (!slices.addEntity(entity, sectionY)) {
+ LOGGER.warn("Entity " + entity + " added to world '" + this.world.getWorld().getName() + "', but was already contained in entity chunk (" + sectionX + "," + sectionZ + ")");
+ }
+
+ entity.setLevelCallback(new EntityCallback(entity));
+
+ this.entityStatusChange(entity, slices, Visibility.HIDDEN, getEntityStatus(entity), false, !fromDisk, false);
+
+ return true;
+ }
+
+ private void removeEntity(final Entity entity) {
+ final int sectionX = entity.sectionX;
+ final int sectionY = entity.sectionY;
+ final int sectionZ = entity.sectionZ;
+ TickThread.ensureTickThread(this.world, sectionX, sectionZ, "Cannot remove entity off-main");
+ if (!entity.isRemoved()) {
+ throw new IllegalStateException("Only call Entity#setRemoved to remove an entity");
+ }
+ final ChunkEntitySlices slices = this.getChunk(sectionX, sectionZ);
+ // all entities should be in a chunk
+ if (slices == null) {
+ LOGGER.warn("Cannot remove entity " + entity + " from null entity slices (" + sectionX + "," + sectionZ + ")");
+ } else {
+ if (!slices.removeEntity(entity, sectionY)) {
+ LOGGER.warn("Failed to remove entity " + entity + " from entity slices (" + sectionX + "," + sectionZ + ")");
+ }
+ }
+ entity.sectionX = entity.sectionY = entity.sectionZ = Integer.MIN_VALUE;
+
+ this.entityByLock.writeLock();
+ try {
+ if (!this.entityById.remove(entity.getId(), entity)) {
+ LOGGER.warn("Failed to remove entity " + entity + " by id, current entity mapped: " + this.entityById.get(entity.getId()));
+ }
+ if (!this.entityByUUID.remove(entity.getUUID(), entity)) {
+ LOGGER.warn("Failed to remove entity " + entity + " by uuid, current entity mapped: " + this.entityByUUID.get(entity.getUUID()));
+ }
+ } finally {
+ this.entityByLock.tryUnlockWrite();
+ }
+ }
+
+ private ChunkEntitySlices moveEntity(final Entity entity) {
+ // ensure we own the entity
+ TickThread.ensureTickThread(entity, "Cannot move entity off-main");
+
+ final BlockPos newPos = entity.blockPosition();
+ final int newSectionX = newPos.getX() >> 4;
+ final int newSectionY = Mth.clamp(newPos.getY() >> 4, this.minSection, this.maxSection);
+ final int newSectionZ = newPos.getZ() >> 4;
+
+ if (newSectionX == entity.sectionX && newSectionY == entity.sectionY && newSectionZ == entity.sectionZ) {
+ return null;
+ }
+
+ // ensure the new section is owned by this tick thread
+ TickThread.ensureTickThread(this.world, newSectionX, newSectionZ, "Cannot move entity off-main");
+
+ // ensure the old section is owned by this tick thread
+ TickThread.ensureTickThread(this.world, entity.sectionX, entity.sectionZ, "Cannot move entity off-main");
+
+ final ChunkEntitySlices old = this.getChunk(entity.sectionX, entity.sectionZ);
+ final ChunkEntitySlices slices = this.getOrCreateChunk(newSectionX, newSectionZ);
+
+ if (!old.removeEntity(entity, entity.sectionY)) {
+ LOGGER.warn("Could not remove entity " + entity + " from its old chunk section (" + entity.sectionX + "," + entity.sectionY + "," + entity.sectionZ + ") since it was not contained in the section");
+ }
+
+ if (!slices.addEntity(entity, newSectionY)) {
+ LOGGER.warn("Could not add entity " + entity + " to its new chunk section (" + newSectionX + "," + newSectionY + "," + newSectionZ + ") as it is already contained in the section");
+ }
+
+ entity.sectionX = newSectionX;
+ entity.sectionY = newSectionY;
+ entity.sectionZ = newSectionZ;
+
+ return slices;
+ }
+
+ public void getEntitiesWithoutDragonParts(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4;
+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4;
+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4;
+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4;
+
+ final int minRegionX = minChunkX >> REGION_SHIFT;
+ final int minRegionZ = minChunkZ >> REGION_SHIFT;
+ final int maxRegionX = maxChunkX >> REGION_SHIFT;
+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT;
+
+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) {
+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0;
+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK;
+
+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) {
+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ);
+
+ if (region == null) {
+ continue;
+ }
+
+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0;
+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK;
+
+ for (int currZ = minZ; currZ <= maxZ; ++currZ) {
+ for (int currX = minX; currX <= maxX; ++currX) {
+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT));
+ if (chunk == null || !chunk.status.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ continue;
+ }
+
+ chunk.getEntitiesWithoutDragonParts(except, box, into, predicate);
+ }
+ }
+ }
+ }
+ }
+
+ public void getEntities(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4;
+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4;
+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4;
+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4;
+
+ final int minRegionX = minChunkX >> REGION_SHIFT;
+ final int minRegionZ = minChunkZ >> REGION_SHIFT;
+ final int maxRegionX = maxChunkX >> REGION_SHIFT;
+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT;
+
+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) {
+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0;
+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK;
+
+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) {
+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ);
+
+ if (region == null) {
+ continue;
+ }
+
+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0;
+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK;
+
+ for (int currZ = minZ; currZ <= maxZ; ++currZ) {
+ for (int currX = minX; currX <= maxX; ++currX) {
+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT));
+ if (chunk == null || !chunk.status.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ continue;
+ }
+
+ chunk.getEntities(except, box, into, predicate);
+ }
+ }
+ }
+ }
+ }
+
+ public void getHardCollidingEntities(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4;
+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4;
+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4;
+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4;
+
+ final int minRegionX = minChunkX >> REGION_SHIFT;
+ final int minRegionZ = minChunkZ >> REGION_SHIFT;
+ final int maxRegionX = maxChunkX >> REGION_SHIFT;
+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT;
+
+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) {
+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0;
+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK;
+
+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) {
+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ);
+
+ if (region == null) {
+ continue;
+ }
+
+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0;
+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK;
+
+ for (int currZ = minZ; currZ <= maxZ; ++currZ) {
+ for (int currX = minX; currX <= maxX; ++currX) {
+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT));
+ if (chunk == null || !chunk.status.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ continue;
+ }
+
+ chunk.getHardCollidingEntities(except, box, into, predicate);
+ }
+ }
+ }
+ }
+ }
+
+ public <T extends Entity> void getEntities(final EntityType<?> type, final AABB box, final List<? super T> into,
+ final Predicate<? super T> predicate) {
+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4;
+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4;
+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4;
+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4;
+
+ final int minRegionX = minChunkX >> REGION_SHIFT;
+ final int minRegionZ = minChunkZ >> REGION_SHIFT;
+ final int maxRegionX = maxChunkX >> REGION_SHIFT;
+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT;
+
+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) {
+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0;
+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK;
+
+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) {
+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ);
+
+ if (region == null) {
+ continue;
+ }
+
+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0;
+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK;
+
+ for (int currZ = minZ; currZ <= maxZ; ++currZ) {
+ for (int currX = minX; currX <= maxX; ++currX) {
+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT));
+ if (chunk == null || !chunk.status.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ continue;
+ }
+
+ chunk.getEntities(type, box, (List)into, (Predicate)predicate);
+ }
+ }
+ }
+ }
+ }
+
+ public <T extends Entity> void getEntities(final Class<? extends T> clazz, final Entity except, final AABB box, final List<? super T> into,
+ final Predicate<? super T> predicate) {
+ final int minChunkX = (Mth.floor(box.minX) - 2) >> 4;
+ final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4;
+ final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4;
+ final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4;
+
+ final int minRegionX = minChunkX >> REGION_SHIFT;
+ final int minRegionZ = minChunkZ >> REGION_SHIFT;
+ final int maxRegionX = maxChunkX >> REGION_SHIFT;
+ final int maxRegionZ = maxChunkZ >> REGION_SHIFT;
+
+ for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) {
+ final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0;
+ final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK;
+
+ for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) {
+ final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ);
+
+ if (region == null) {
+ continue;
+ }
+
+ final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0;
+ final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK;
+
+ for (int currZ = minZ; currZ <= maxZ; ++currZ) {
+ for (int currX = minX; currX <= maxX; ++currX) {
+ final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT));
+ if (chunk == null || !chunk.status.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ continue;
+ }
+
+ chunk.getEntities(clazz, except, box, into, predicate);
+ }
+ }
+ }
+ }
+ }
+
+ public void entitySectionLoad(final int chunkX, final int chunkZ, final ChunkEntitySlices slices) {
+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot load in entity section off-main");
+ synchronized (this) {
+ final ChunkEntitySlices curr = this.getChunk(chunkX, chunkZ);
+ if (curr != null) {
+ this.removeChunk(chunkX, chunkZ);
+
+ curr.mergeInto(slices);
+
+ this.addChunk(chunkX, chunkZ, slices);
+ } else {
+ this.addChunk(chunkX, chunkZ, slices);
+ }
+ }
+ }
+
+ public void entitySectionUnload(final int chunkX, final int chunkZ) {
+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot unload entity section off-main");
+ this.removeChunk(chunkX, chunkZ);
+ }
+
+ public ChunkEntitySlices getChunk(final int chunkX, final int chunkZ) {
+ final ChunkSlicesRegion region = this.getRegion(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT);
+ if (region == null) {
+ return null;
+ }
+
+ return region.get((chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT));
+ }
+
+ public ChunkEntitySlices getOrCreateChunk(final int chunkX, final int chunkZ) {
+ final ChunkSlicesRegion region = this.getRegion(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT);
+ ChunkEntitySlices ret;
+ if (region == null || (ret = region.get((chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT))) == null) {
+ // loadInEntityChunk will call addChunk for us
+ return this.world.chunkTaskScheduler.chunkHolderManager.getOrCreateEntityChunk(chunkX, chunkZ, true);
+ }
+
+ return ret;
+ }
+
+ public ChunkSlicesRegion getRegion(final int regionX, final int regionZ) {
+ final long key = CoordinateUtils.getChunkKey(regionX, regionZ);
+ final long attempt = this.stateLock.tryOptimisticRead();
+ if (attempt != 0L) {
+ try {
+ final ChunkSlicesRegion ret = this.regions.get(key);
+
+ if (this.stateLock.validate(attempt)) {
+ return ret;
+ }
+ } catch (final Error error) {
+ throw error;
+ } catch (final Throwable thr) {
+ // ignore
+ }
+ }
+
+ this.stateLock.readLock();
+ try {
+ return this.regions.get(key);
+ } finally {
+ this.stateLock.tryUnlockRead();
+ }
+ }
+
+ private synchronized void removeChunk(final int chunkX, final int chunkZ) {
+ final long key = CoordinateUtils.getChunkKey(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT);
+ final int relIndex = (chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT);
+
+ final ChunkSlicesRegion region = this.regions.get(key);
+ final int remaining = region.remove(relIndex);
+
+ if (remaining == 0) {
+ this.stateLock.writeLock();
+ try {
+ this.regions.remove(key);
+ } finally {
+ this.stateLock.tryUnlockWrite();
+ }
+ }
+ }
+
+ public synchronized void addChunk(final int chunkX, final int chunkZ, final ChunkEntitySlices slices) {
+ final long key = CoordinateUtils.getChunkKey(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT);
+ final int relIndex = (chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT);
+
+ ChunkSlicesRegion region = this.regions.get(key);
+ if (region != null) {
+ region.add(relIndex, slices);
+ } else {
+ region = new ChunkSlicesRegion();
+ region.add(relIndex, slices);
+ this.stateLock.writeLock();
+ try {
+ this.regions.put(key, region);
+ } finally {
+ this.stateLock.tryUnlockWrite();
+ }
+ }
+ }
+
+ public static final class ChunkSlicesRegion {
+
+ protected final ChunkEntitySlices[] slices = new ChunkEntitySlices[REGION_SIZE * REGION_SIZE];
+ protected int sliceCount;
+
+ public ChunkEntitySlices get(final int index) {
+ return this.slices[index];
+ }
+
+ public int remove(final int index) {
+ final ChunkEntitySlices slices = this.slices[index];
+ if (slices == null) {
+ throw new IllegalStateException();
+ }
+
+ this.slices[index] = null;
+
+ return --this.sliceCount;
+ }
+
+ public void add(final int index, final ChunkEntitySlices slices) {
+ final ChunkEntitySlices curr = this.slices[index];
+ if (curr != null) {
+ throw new IllegalStateException();
+ }
+
+ this.slices[index] = slices;
+
+ ++this.sliceCount;
+ }
+ }
+
+ private final class EntityCallback implements EntityInLevelCallback {
+
+ public final Entity entity;
+
+ public EntityCallback(final Entity entity) {
+ this.entity = entity;
+ }
+
+ @Override
+ public void onMove() {
+ final Entity entity = this.entity;
+ final Visibility oldVisibility = getEntityStatus(entity);
+ final ChunkEntitySlices newSlices = EntityLookup.this.moveEntity(this.entity);
+ if (newSlices == null) {
+ // no new section, so didn't change sections
+ return;
+ }
+ final Visibility newVisibility = getEntityStatus(entity);
+
+ EntityLookup.this.entityStatusChange(entity, newSlices, oldVisibility, newVisibility, true, false, false);
+ }
+
+ @Override
+ public void onRemove(final Entity.RemovalReason reason) {
+ final Entity entity = this.entity;
+ TickThread.ensureTickThread(entity, "Cannot remove entity off-main"); // Paper - rewrite chunk system
+ final Visibility tickingState = EntityLookup.getEntityStatus(entity);
+
+ EntityLookup.this.removeEntity(entity);
+
+ EntityLookup.this.entityStatusChange(entity, null, tickingState, Visibility.HIDDEN, false, false, reason.shouldDestroy());
+
+ this.entity.setLevelCallback(NoOpCallback.INSTANCE);
+ }
+ }
+
+ private static final class NoOpCallback implements EntityInLevelCallback {
+
+ public static final NoOpCallback INSTANCE = new NoOpCallback();
+
+ @Override
+ public void onMove() {}
+
+ @Override
+ public void onRemove(final Entity.RemovalReason reason) {}
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java
new file mode 100644
index 0000000000000000000000000000000000000000..a08cde4eefe879adcee7c4118bc38f98c5097ed0
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java
@@ -0,0 +1,1328 @@
+package io.papermc.paper.chunk.system.io;
+
+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue;
+import ca.spottedleaf.concurrentutil.executor.Cancellable;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedQueueExecutorThread;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadedTaskQueue;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import it.unimi.dsi.fastutil.HashCommon;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.storage.RegionFile;
+import net.minecraft.world.level.chunk.storage.RegionFileStorage;
+import org.slf4j.Logger;
+import java.io.IOException;
+import java.lang.invoke.VarHandle;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * Prioritised RegionFile I/O executor, responsible for all RegionFile access.
+ * <p>
+ * All functions provided are MT-Safe, however certain ordering constraints are recommended:
+ * <li>
+ * Chunk saves may not occur for unloaded chunks.
+ * </li>
+ * <li>
+ * Tasks must be scheduled on the chunk scheduler thread.
+ * </li>
+ * By following these constraints, no chunk data loss should occur with the exception of underlying I/O problems.
+ * </p>
+ */
+public final class RegionFileIOThread extends PrioritisedQueueExecutorThread {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ /**
+ * The kinds of region files controlled by the region file thread. Add more when needed, and ensure
+ * getControllerFor is updated.
+ */
+ public static enum RegionFileType {
+ CHUNK_DATA,
+ POI_DATA,
+ ENTITY_DATA;
+ }
+
+ protected static final RegionFileType[] CACHED_REGIONFILE_TYPES = RegionFileType.values();
+
+ private ChunkDataController getControllerFor(final ServerLevel world, final RegionFileType type) {
+ switch (type) {
+ case CHUNK_DATA:
+ return world.chunkDataControllerNew;
+ case POI_DATA:
+ return world.poiDataControllerNew;
+ case ENTITY_DATA:
+ return world.entityDataControllerNew;
+ default:
+ throw new IllegalStateException("Unknown controller type " + type);
+ }
+ }
+
+ /**
+ * Collects regionfile data for a certain chunk.
+ */
+ public static final class RegionFileData {
+
+ private final boolean[] hasResult = new boolean[CACHED_REGIONFILE_TYPES.length];
+ private final CompoundTag[] data = new CompoundTag[CACHED_REGIONFILE_TYPES.length];
+ private final Throwable[] throwables = new Throwable[CACHED_REGIONFILE_TYPES.length];
+
+ /**
+ * Sets the result associated with the specified regionfile type. Note that
+ * results can only be set once per regionfile type.
+ *
+ * @param type The regionfile type.
+ * @param data The result to set.
+ */
+ public void setData(final RegionFileType type, final CompoundTag data) {
+ final int index = type.ordinal();
+
+ if (this.hasResult[index]) {
+ throw new IllegalArgumentException("Result already exists for type " + type);
+ }
+ this.hasResult[index] = true;
+ this.data[index] = data;
+ }
+
+ /**
+ * Sets the result associated with the specified regionfile type. Note that
+ * results can only be set once per regionfile type.
+ *
+ * @param type The regionfile type.
+ * @param throwable The result to set.
+ */
+ public void setThrowable(final RegionFileType type, final Throwable throwable) {
+ final int index = type.ordinal();
+
+ if (this.hasResult[index]) {
+ throw new IllegalArgumentException("Result already exists for type " + type);
+ }
+ this.hasResult[index] = true;
+ this.throwables[index] = throwable;
+ }
+
+ /**
+ * Returns whether there is a result for the specified regionfile type.
+ *
+ * @param type Specified regionfile type.
+ *
+ * @return Whether a result exists for {@code type}.
+ */
+ public boolean hasResult(final RegionFileType type) {
+ return this.hasResult[type.ordinal()];
+ }
+
+ /**
+ * Returns the data result for the regionfile type.
+ *
+ * @param type Specified regionfile type.
+ *
+ * @throws IllegalArgumentException If the result has not been set for {@code type}.
+ * @return The data result for the specified type. If the result is a {@code Throwable},
+ * then returns {@code null}.
+ */
+ public CompoundTag getData(final RegionFileType type) {
+ final int index = type.ordinal();
+
+ if (!this.hasResult[index]) {
+ throw new IllegalArgumentException("Result does not exist for type " + type);
+ }
+
+ return this.data[index];
+ }
+
+ /**
+ * Returns the throwable result for the regionfile type.
+ *
+ * @param type Specified regionfile type.
+ *
+ * @throws IllegalArgumentException If the result has not been set for {@code type}.
+ * @return The throwable result for the specified type. If the result is an {@code CompoundTag},
+ * then returns {@code null}.
+ */
+ public Throwable getThrowable(final RegionFileType type) {
+ final int index = type.ordinal();
+
+ if (!this.hasResult[index]) {
+ throw new IllegalArgumentException("Result does not exist for type " + type);
+ }
+
+ return this.throwables[index];
+ }
+ }
+
+ private static final Object INIT_LOCK = new Object();
+
+ static RegionFileIOThread[] threads;
+
+ /* needs to be consistent given a set of parameters */
+ static RegionFileIOThread selectThread(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) {
+ if (threads == null) {
+ throw new IllegalStateException("Threads not initialised");
+ }
+
+ final int regionX = chunkX >> 5;
+ final int regionZ = chunkZ >> 5;
+ final int typeOffset = type.ordinal();
+
+ return threads[(System.identityHashCode(world) + regionX + regionZ + typeOffset) % threads.length];
+ }
+
+ /**
+ * Shuts down the I/O executor(s). Watis for all tasks to complete if specified.
+ * Tasks queued during this call might not be accepted, and tasks queued after will not be accepted.
+ *
+ * @param wait Whether to wait until all tasks have completed.
+ */
+ public static void close(final boolean wait) {
+ for (int i = 0, len = threads.length; i < len; ++i) {
+ threads[i].close(false, true);
+ }
+ if (wait) {
+ RegionFileIOThread.flush();
+ }
+ }
+
+ public static long[] getExecutedTasks() {
+ final long[] ret = new long[threads.length];
+ for (int i = 0, len = threads.length; i < len; ++i) {
+ ret[i] = threads[i].getTotalTasksExecuted();
+ }
+
+ return ret;
+ }
+
+ public static long[] getTasksScheduled() {
+ final long[] ret = new long[threads.length];
+ for (int i = 0, len = threads.length; i < len; ++i) {
+ ret[i] = threads[i].getTotalTasksScheduled();
+ }
+ return ret;
+ }
+
+ public static void flush() {
+ for (int i = 0, len = threads.length; i < len; ++i) {
+ threads[i].waitUntilAllExecuted();
+ }
+ }
+
+ public static void partialFlush(final int totalTasksRemaining) {
+ long failures = 1L; // start out at 0.25ms
+
+ for (;;) {
+ final long[] executed = getExecutedTasks();
+ final long[] scheduled = getTasksScheduled();
+
+ long sum = 0;
+ for (int i = 0; i < executed.length; ++i) {
+ sum += scheduled[i] - executed[i];
+ }
+
+ if (sum <= totalTasksRemaining) {
+ break;
+ }
+
+ failures = ConcurrentUtil.linearLongBackoff(failures, 250_000L, 5_000_000L); // 500us, 5ms
+ }
+ }
+
+ /**
+ * Inits the executor with the specified number of threads.
+ *
+ * @param threads Specified number of threads.
+ */
+ public static void init(final int threads) {
+ synchronized (INIT_LOCK) {
+ if (RegionFileIOThread.threads != null) {
+ throw new IllegalStateException("Already initialised threads");
+ }
+
+ RegionFileIOThread.threads = new RegionFileIOThread[threads];
+
+ for (int i = 0; i < threads; ++i) {
+ RegionFileIOThread.threads[i] = new RegionFileIOThread(i);
+ RegionFileIOThread.threads[i].start();
+ }
+ }
+ }
+
+ private RegionFileIOThread(final int threadNumber) {
+ super(new PrioritisedThreadedTaskQueue(), (int)(1.0e6)); // 1.0ms spinwait time
+ this.setName("RegionFile I/O Thread #" + threadNumber);
+ this.setPriority(Thread.NORM_PRIORITY - 2); // we keep priority close to normal because threads can wait on us
+ this.setUncaughtExceptionHandler((final Thread thread, final Throwable thr) -> {
+ LOGGER.error("Uncaught exception thrown from I/O thread, report this! Thread: " + thread.getName(), thr);
+ });
+ }
+
+ /**
+ * Returns whether the current thread is a regionfile I/O executor.
+ * @return Whether the current thread is a regionfile I/O executor.
+ */
+ public static boolean isRegionFileThread() {
+ return Thread.currentThread() instanceof RegionFileIOThread;
+ }
+
+ /**
+ * Returns the priority associated with blocking I/O based on the current thread. The goal is to avoid
+ * dumb plugins from taking away priority from threads we consider crucial.
+ * @return The priroity to use with blocking I/O on the current thread.
+ */
+ public static PrioritisedExecutor.Priority getIOBlockingPriorityForCurrentThread() {
+ if (TickThread.isTickThread()) {
+ return PrioritisedExecutor.Priority.BLOCKING;
+ }
+ return PrioritisedExecutor.Priority.HIGHEST;
+ }
+
+ /**
+ * Returns the current {@code CompoundTag} pending for write for the specified chunk & regionfile type.
+ * Note that this does not copy the result, so do not modify the result returned.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param type Specified regionfile type.
+ *
+ * @return The compound tag associated for the specified chunk. {@code null} if no write was pending, or if {@code null} is the write pending.
+ */
+ public static CompoundTag getPendingWrite(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ return thread.getPendingWriteInternal(world, chunkX, chunkZ, type);
+ }
+
+ CompoundTag getPendingWriteInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ)));
+
+ if (task == null) {
+ return null;
+ }
+
+ final CompoundTag ret = task.inProgressWrite;
+
+ return ret == ChunkDataTask.NOTHING_TO_WRITE ? null : ret;
+ }
+
+ /**
+ * Returns the priority for the specified regionfile type for the specified chunk.
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param type Specified regionfile type.
+ * @return The priority for the chunk
+ */
+ public static PrioritisedExecutor.Priority getPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ return thread.getPriorityInternal(world, chunkX, chunkZ, type);
+ }
+
+ PrioritisedExecutor.Priority getPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ)));
+
+ if (task == null) {
+ return PrioritisedExecutor.Priority.COMPLETING;
+ }
+
+ return task.prioritisedTask.getPriority();
+ }
+
+ /**
+ * Sets the priority for all regionfile types for the specified chunk. Note that great care should
+ * be taken using this method, as there can be multiple tasks tied to the same chunk that want different
+ * priorities.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param priority New priority.
+ *
+ * @see #raisePriority(ServerLevel, int, int, Priority)
+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority)
+ */
+ public static void setPriority(final ServerLevel world, final int chunkX, final int chunkZ,
+ final PrioritisedExecutor.Priority priority) {
+ for (final RegionFileType type : CACHED_REGIONFILE_TYPES) {
+ RegionFileIOThread.setPriority(world, chunkX, chunkZ, type, priority);
+ }
+ }
+
+ /**
+ * Sets the priority for the specified regionfile type for the specified chunk. Note that great care should
+ * be taken using this method, as there can be multiple tasks tied to the same chunk that want different
+ * priorities.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param type Specified regionfile type.
+ * @param priority New priority.
+ *
+ * @see #raisePriority(ServerLevel, int, int, Priority)
+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority)
+ */
+ public static void setPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ thread.setPriorityInternal(world, chunkX, chunkZ, type, priority);
+ }
+
+ void setPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ)));
+
+ if (task != null) {
+ task.prioritisedTask.setPriority(priority);
+ }
+ }
+
+ /**
+ * Raises the priority for all regionfile types for the specified chunk.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param priority New priority.
+ *
+ * @see #setPriority(ServerLevel, int, int, Priority)
+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority)
+ */
+ public static void raisePriority(final ServerLevel world, final int chunkX, final int chunkZ,
+ final PrioritisedExecutor.Priority priority) {
+ for (final RegionFileType type : CACHED_REGIONFILE_TYPES) {
+ RegionFileIOThread.raisePriority(world, chunkX, chunkZ, type, priority);
+ }
+ }
+
+ /**
+ * Raises the priority for the specified regionfile type for the specified chunk.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param type Specified regionfile type.
+ * @param priority New priority.
+ *
+ * @see #setPriority(ServerLevel, int, int, Priority)
+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, Priority)
+ * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority)
+ */
+ public static void raisePriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ thread.raisePriorityInternal(world, chunkX, chunkZ, type, priority);
+ }
+
+ void raisePriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ)));
+
+ if (task != null) {
+ task.prioritisedTask.raisePriority(priority);
+ }
+ }
+
+ /**
+ * Lowers the priority for all regionfile types for the specified chunk.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param priority New priority.
+ *
+ * @see #raisePriority(ServerLevel, int, int, Priority)
+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority)
+ * @see #setPriority(ServerLevel, int, int, Priority)
+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority)
+ */
+ public static void lowerPriority(final ServerLevel world, final int chunkX, final int chunkZ,
+ final PrioritisedExecutor.Priority priority) {
+ for (final RegionFileType type : CACHED_REGIONFILE_TYPES) {
+ RegionFileIOThread.lowerPriority(world, chunkX, chunkZ, type, priority);
+ }
+ }
+
+ /**
+ * Lowers the priority for the specified regionfile type for the specified chunk.
+ *
+ * @param world Specified world.
+ * @param chunkX Specified chunk x.
+ * @param chunkZ Specified chunk z.
+ * @param type Specified regionfile type.
+ * @param priority New priority.
+ *
+ * @see #raisePriority(ServerLevel, int, int, Priority)
+ * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority)
+ * @see #setPriority(ServerLevel, int, int, Priority)
+ * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority)
+ */
+ public static void lowerPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ thread.lowerPriorityInternal(world, chunkX, chunkZ, type, priority);
+ }
+
+ void lowerPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+ final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ)));
+
+ if (task != null) {
+ task.prioritisedTask.lowerPriority(priority);
+ }
+ }
+
+ /**
+ * Schedules the chunk data to be written asynchronously.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means
+ * saves must be scheduled before a chunk is unloaded.
+ * </li>
+ * <li>
+ * Writes may be called concurrently, although only the "later" write will go through.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param data Chunk's data
+ * @param type The regionfile type to write to.
+ *
+ * @throws IllegalStateException If the file io thread has shutdown.
+ */
+ public static void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data,
+ final RegionFileType type) {
+ RegionFileIOThread.scheduleSave(world, chunkX, chunkZ, data, type, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ /**
+ * Schedules the chunk data to be written asynchronously.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means
+ * saves must be scheduled before a chunk is unloaded.
+ * </li>
+ * <li>
+ * Writes may be called concurrently, although only the "later" write will go through.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param data Chunk's data
+ * @param type The regionfile type to write to.
+ * @param priority The minimum priority to schedule at.
+ *
+ * @throws IllegalStateException If the file io thread has shutdown.
+ */
+ public static void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data,
+ final RegionFileType type, final PrioritisedExecutor.Priority priority) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ thread.scheduleSaveInternal(world, chunkX, chunkZ, data, type, priority);
+ }
+
+ void scheduleSaveInternal(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data,
+ final RegionFileType type, final PrioritisedExecutor.Priority priority) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+
+ final boolean[] created = new boolean[1];
+ final ChunkCoordinate key = new ChunkCoordinate(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ final ChunkDataTask task = taskController.tasks.compute(key, (final ChunkCoordinate keyInMap, final ChunkDataTask taskRunning) -> {
+ if (taskRunning == null || taskRunning.failedWrite) {
+ // no task is scheduled or the previous write failed - meaning we need to overwrite it
+
+ // create task
+ final ChunkDataTask newTask = new ChunkDataTask(world, chunkX, chunkZ, taskController, RegionFileIOThread.this, priority);
+ newTask.inProgressWrite = data;
+ created[0] = true;
+
+ return newTask;
+ }
+
+ taskRunning.inProgressWrite = data;
+
+ return taskRunning;
+ });
+
+ if (created[0]) {
+ task.prioritisedTask.queue();
+ } else {
+ task.prioritisedTask.raisePriority(priority);
+ }
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously. This task will load all regionfile types, and then call
+ * {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)}
+ * for single load.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param onComplete Consumer to execute once this task has completed
+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost
+ * of this call.
+ *
+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data.
+ *
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...)
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...)
+ */
+ public static Cancellable loadAllChunkData(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Consumer<RegionFileData> onComplete, final boolean intendingToBlock) {
+ return RegionFileIOThread.loadAllChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously. This task will load all regionfile types, and then call
+ * {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)}
+ * for single load.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param onComplete Consumer to execute once this task has completed
+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost
+ * of this call.
+ * @param priority The minimum priority to load the data at.
+ *
+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data.
+ *
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...)
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...)
+ */
+ public static Cancellable loadAllChunkData(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Consumer<RegionFileData> onComplete, final boolean intendingToBlock,
+ final PrioritisedExecutor.Priority priority) {
+ return RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, priority, CACHED_REGIONFILE_TYPES);
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously. This task will load data for the specified regionfile type(s), and
+ * then call {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)}
+ * for single load.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param onComplete Consumer to execute once this task has completed
+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost
+ * of this call.
+ * @param types The regionfile type(s) to load.
+ *
+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data.
+ *
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority)
+ */
+ public static Cancellable loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Consumer<RegionFileData> onComplete, final boolean intendingToBlock,
+ final RegionFileType... types) {
+ return RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL, types);
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously. This task will load data for the specified regionfile type(s), and
+ * then call {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)}
+ * for single load.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param onComplete Consumer to execute once this task has completed
+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost
+ * of this call.
+ * @param types The regionfile type(s) to load.
+ * @param priority The minimum priority to load the data at.
+ *
+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data.
+ *
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)
+ * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority)
+ */
+ public static Cancellable loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Consumer<RegionFileData> onComplete, final boolean intendingToBlock,
+ final PrioritisedExecutor.Priority priority, final RegionFileType... types) {
+ if (types == null) {
+ throw new NullPointerException("Types cannot be null");
+ }
+ if (types.length == 0) {
+ throw new IllegalArgumentException("Types cannot be empty");
+ }
+
+ final RegionFileData ret = new RegionFileData();
+
+ final Cancellable[] reads = new CancellableRead[types.length];
+ final AtomicInteger completions = new AtomicInteger();
+ final int expectedCompletions = types.length;
+
+ for (int i = 0; i < expectedCompletions; ++i) {
+ final RegionFileType type = types[i];
+ reads[i] = RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type,
+ (final CompoundTag data, final Throwable throwable) -> {
+ if (throwable != null) {
+ ret.setThrowable(type, throwable);
+ } else {
+ ret.setData(type, data);
+ }
+
+ if (completions.incrementAndGet() == expectedCompletions) {
+ onComplete.accept(ret);
+ }
+ }, intendingToBlock, priority);
+ }
+
+ return new CancellableReads(reads);
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously. This task will load the specified regionfile type, and then call
+ * {@code onComplete}.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param onComplete Consumer to execute once this task has completed
+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost
+ * of this call.
+ *
+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data.
+ *
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...)
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority)
+ */
+ public static Cancellable loadDataAsync(final ServerLevel world, final int chunkX, final int chunkZ,
+ final RegionFileType type, final BiConsumer<CompoundTag, Throwable> onComplete,
+ final boolean intendingToBlock) {
+ return RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ /**
+ * Schedules a load to be executed asynchronously. This task will load the specified regionfile type, and then call
+ * {@code onComplete}.
+ * <p>
+ * Impl notes:
+ * </p>
+ * <li>
+ * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may
+ * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of
+ * data is undefined behaviour, and can cause deadlock.
+ * </li>
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param onComplete Consumer to execute once this task has completed
+ * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost
+ * of this call.
+ * @param priority Minimum priority to load the data at.
+ *
+ * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data.
+ *
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...)
+ * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean)
+ * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority)
+ */
+ public static Cancellable loadDataAsync(final ServerLevel world, final int chunkX, final int chunkZ,
+ final RegionFileType type, final BiConsumer<CompoundTag, Throwable> onComplete,
+ final boolean intendingToBlock, final PrioritisedExecutor.Priority priority) {
+ final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type);
+ return thread.loadDataAsyncInternal(world, chunkX, chunkZ, type, onComplete, intendingToBlock, priority);
+ }
+
+ private static Boolean doesRegionFileExist(final int chunkX, final int chunkZ, final boolean intendingToBlock,
+ final ChunkDataController taskController) {
+ final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ);
+ if (intendingToBlock) {
+ return taskController.computeForRegionFile(chunkX, chunkZ, true, (final RegionFile file) -> {
+ if (file == null) { // null if no regionfile exists
+ return Boolean.FALSE;
+ }
+
+ return file.hasChunk(chunkPos) ? Boolean.TRUE : Boolean.FALSE;
+ });
+ } else {
+ return taskController.computeForRegionFileIfLoaded(chunkX, chunkZ, (final RegionFile file) -> {
+ if (file == null) { // null if not loaded
+ return Boolean.TRUE;
+ }
+
+ return file.hasChunk(chunkPos) ? Boolean.TRUE : Boolean.FALSE;
+ });
+ }
+ }
+
+ Cancellable loadDataAsyncInternal(final ServerLevel world, final int chunkX, final int chunkZ,
+ final RegionFileType type, final BiConsumer<CompoundTag, Throwable> onComplete,
+ final boolean intendingToBlock, final PrioritisedExecutor.Priority priority) {
+ final ChunkDataController taskController = this.getControllerFor(world, type);
+
+ final ImmediateCallbackCompletion callbackInfo = new ImmediateCallbackCompletion();
+
+ final ChunkCoordinate key = new ChunkCoordinate(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ final BiFunction<ChunkCoordinate, ChunkDataTask, ChunkDataTask> compute = (final ChunkCoordinate keyInMap, final ChunkDataTask running) -> {
+ if (running == null) {
+ // not scheduled
+
+ if (callbackInfo.regionFileCalculation == null) {
+ // caller will compute this outside of compute(), to avoid holding the bin lock
+ callbackInfo.needsRegionFileTest = true;
+ return null;
+ }
+
+ if (callbackInfo.regionFileCalculation == Boolean.FALSE) {
+ // not on disk
+ callbackInfo.data = null;
+ callbackInfo.throwable = null;
+ callbackInfo.completeNow = true;
+ return null;
+ }
+
+ // set up task
+ final ChunkDataTask newTask = new ChunkDataTask(
+ world, chunkX, chunkZ, taskController, RegionFileIOThread.this, priority
+ );
+ newTask.inProgressRead = new RegionFileIOThread.InProgressRead();
+ newTask.inProgressRead.waiters.add(onComplete);
+
+ callbackInfo.tasksNeedsScheduling = true;
+ return newTask;
+ }
+
+ final CompoundTag pendingWrite = running.inProgressWrite;
+
+ if (pendingWrite == ChunkDataTask.NOTHING_TO_WRITE) {
+ // need to add to waiters here, because the regionfile thread will use compute() to lock and check for cancellations
+ if (!running.inProgressRead.addToWaiters(onComplete)) {
+ callbackInfo.data = running.inProgressRead.value;
+ callbackInfo.throwable = running.inProgressRead.throwable;
+ callbackInfo.completeNow = true;
+ }
+ return running;
+ }
+ // using the result sync here - don't bump priority
+
+ // at this stage we have to use the in progress write's data to avoid an order issue
+ callbackInfo.data = pendingWrite;
+ callbackInfo.throwable = null;
+ callbackInfo.completeNow = true;
+ return running;
+ };
+
+ ChunkDataTask curr = taskController.tasks.get(key);
+ if (curr == null) {
+ callbackInfo.regionFileCalculation = doesRegionFileExist(chunkX, chunkZ, intendingToBlock, taskController);
+ }
+ ChunkDataTask ret = taskController.tasks.compute(key, compute);
+ if (callbackInfo.needsRegionFileTest) {
+ // curr isn't null but when we went into compute() it was
+ callbackInfo.regionFileCalculation = doesRegionFileExist(chunkX, chunkZ, intendingToBlock, taskController);
+ // now it should be fine
+ ret = taskController.tasks.compute(key, compute);
+ }
+
+ // needs to be scheduled
+ if (callbackInfo.tasksNeedsScheduling) {
+ ret.prioritisedTask.queue();
+ } else if (callbackInfo.completeNow) {
+ try {
+ onComplete.accept(callbackInfo.data, callbackInfo.throwable);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Callback " + ConcurrentUtil.genericToString(onComplete) + " synchronously failed to handle chunk data for task " + ret.toString(), thr);
+ }
+ } else {
+ // we're waiting on a task we didn't schedule, so raise its priority to what we want
+ ret.prioritisedTask.raisePriority(priority);
+ }
+
+ return new CancellableRead(onComplete, ret);
+ }
+
+ /**
+ * Schedules a load task to be executed asynchronously, and blocks on that task.
+ *
+ * @param world Chunk's world
+ * @param chunkX Chunk's x coordinate
+ * @param chunkZ Chunk's z coordinate
+ * @param type Regionfile type
+ * @param priority Minimum priority to load the data at.
+ *
+ * @return The chunk data for the chunk. Note that a {@code null} result means the chunk or regionfile does not exist on disk.
+ *
+ * @throws IOException If the load fails for any reason
+ */
+ public static CompoundTag loadData(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type,
+ final PrioritisedExecutor.Priority priority) throws IOException {
+ final CompletableFuture<CompoundTag> ret = new CompletableFuture<>();
+
+ RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, (final CompoundTag compound, final Throwable thr) -> {
+ if (thr != null) {
+ ret.completeExceptionally(thr);
+ } else {
+ ret.complete(compound);
+ }
+ }, true, priority);
+
+ try {
+ return ret.join();
+ } catch (final CompletionException ex) {
+ throw new IOException(ex);
+ }
+ }
+
+ private static final class ImmediateCallbackCompletion {
+
+ public CompoundTag data;
+ public Throwable throwable;
+ public boolean completeNow;
+ public boolean tasksNeedsScheduling;
+ public boolean needsRegionFileTest;
+ public Boolean regionFileCalculation;
+
+ }
+
+ static final class CancellableRead implements Cancellable {
+
+ private BiConsumer<CompoundTag, Throwable> callback;
+ private RegionFileIOThread.ChunkDataTask task;
+
+ CancellableRead(final BiConsumer<CompoundTag, Throwable> callback, final RegionFileIOThread.ChunkDataTask task) {
+ this.callback = callback;
+ this.task = task;
+ }
+
+ @Override
+ public boolean cancel() {
+ final BiConsumer<CompoundTag, Throwable> callback = this.callback;
+ final RegionFileIOThread.ChunkDataTask task = this.task;
+
+ if (callback == null || task == null) {
+ return false;
+ }
+
+ this.callback = null;
+ this.task = null;
+
+ final RegionFileIOThread.InProgressRead read = task.inProgressRead;
+
+ // read can be null if no read was scheduled (i.e no regionfile existed or chunk in regionfile didn't)
+ return (read != null && read.waiters.remove(callback));
+ }
+ }
+
+ static final class CancellableReads implements Cancellable {
+
+ private Cancellable[] reads;
+
+ protected static final VarHandle READS_HANDLE = ConcurrentUtil.getVarHandle(CancellableReads.class, "reads", Cancellable[].class);
+
+ CancellableReads(final Cancellable[] reads) {
+ this.reads = reads;
+ }
+
+ @Override
+ public boolean cancel() {
+ final Cancellable[] reads = (Cancellable[])READS_HANDLE.getAndSet((CancellableReads)this, (Cancellable[])null);
+
+ if (reads == null) {
+ return false;
+ }
+
+ boolean ret = false;
+
+ for (final Cancellable read : reads) {
+ ret |= read.cancel();
+ }
+
+ return ret;
+ }
+ }
+
+ static final class InProgressRead {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ CompoundTag value;
+ Throwable throwable;
+ final MultiThreadedQueue<BiConsumer<CompoundTag, Throwable>> waiters = new MultiThreadedQueue<>();
+
+ // rets false if already completed (callback not invoked), true if callback was added
+ boolean addToWaiters(final BiConsumer<CompoundTag, Throwable> callback) {
+ return this.waiters.add(callback);
+ }
+
+ void complete(final RegionFileIOThread.ChunkDataTask task, final CompoundTag value, final Throwable throwable) {
+ this.value = value;
+ this.throwable = throwable;
+
+ BiConsumer<CompoundTag, Throwable> consumer;
+ while ((consumer = this.waiters.pollOrBlockAdds()) != null) {
+ try {
+ consumer.accept(value, throwable);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Callback " + ConcurrentUtil.genericToString(consumer) + " failed to handle chunk data for task " + task.toString(), thr);
+ }
+ }
+ }
+ }
+
+ /**
+ * Class exists to replace {@link Long} usages as keys inside non-fastutil hashtables. The hash for some Long {@code x}
+ * is defined as {@code (x >>> 32) ^ x}. Chunk keys as long values are defined as {@code ((chunkX & 0xFFFFFFFFL) | (chunkZ << 32))},
+ * which means the hashcode as a Long value will be {@code chunkX ^ chunkZ}. Given that most chunks are created within a radius arounds players,
+ * this will lead to many hash collisions. So, this class uses a better hashing algorithm so that usage of
+ * non-fastutil collections is not degraded.
+ */
+ public static final class ChunkCoordinate implements Comparable<ChunkCoordinate> {
+
+ public final long key;
+
+ public ChunkCoordinate(final long key) {
+ this.key = key;
+ }
+
+ @Override
+ public int hashCode() {
+ return (int)HashCommon.mix(this.key);
+ }
+
+ @Override
+ public boolean equals(final Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (!(obj instanceof ChunkCoordinate)) {
+ return false;
+ }
+
+ final ChunkCoordinate other = (ChunkCoordinate)obj;
+
+ return this.key == other.key;
+ }
+
+ // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain
+ // is too large. So we should implement compareTo to help.
+ @Override
+ public int compareTo(final RegionFileIOThread.ChunkCoordinate other) {
+ return Long.compare(this.key, other.key);
+ }
+
+ @Override
+ public String toString() {
+ return new ChunkPos(this.key).toString();
+ }
+ }
+
+ public static abstract class ChunkDataController {
+
+ // ConcurrentHashMap synchronizes per chain, so reduce the chance of task's hashes colliding.
+ protected final ConcurrentHashMap<ChunkCoordinate, ChunkDataTask> tasks = new ConcurrentHashMap<>(8192, 0.10f);
+
+ public final RegionFileType type;
+
+ public ChunkDataController(final RegionFileType type) {
+ this.type = type;
+ }
+
+ public abstract RegionFileStorage getCache();
+
+ public abstract void writeData(final int chunkX, final int chunkZ, final CompoundTag compound) throws IOException;
+
+ public abstract CompoundTag readData(final int chunkX, final int chunkZ) throws IOException;
+
+ public boolean hasTasks() {
+ return !this.tasks.isEmpty();
+ }
+
+ public <T> T computeForRegionFile(final int chunkX, final int chunkZ, final boolean existingOnly, final Function<RegionFile, T> function) {
+ final RegionFileStorage cache = this.getCache();
+ final RegionFile regionFile;
+ synchronized (cache) {
+ try {
+ regionFile = cache.getRegionFile(new ChunkPos(chunkX, chunkZ), existingOnly, true);
+ } catch (final IOException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+
+ try {
+ return function.apply(regionFile);
+ } finally {
+ if (regionFile != null) {
+ regionFile.fileLock.unlock();
+ }
+ }
+ }
+
+ public <T> T computeForRegionFileIfLoaded(final int chunkX, final int chunkZ, final Function<RegionFile, T> function) {
+ final RegionFileStorage cache = this.getCache();
+ final RegionFile regionFile;
+
+ synchronized (cache) {
+ regionFile = cache.getRegionFileIfLoaded(new ChunkPos(chunkX, chunkZ));
+ if (regionFile != null) {
+ regionFile.fileLock.lock();
+ }
+ }
+
+ try {
+ return function.apply(regionFile);
+ } finally {
+ if (regionFile != null) {
+ regionFile.fileLock.unlock();
+ }
+ }
+ }
+ }
+
+ static final class ChunkDataTask implements Runnable {
+
+ protected static final CompoundTag NOTHING_TO_WRITE = new CompoundTag();
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ RegionFileIOThread.InProgressRead inProgressRead;
+ volatile CompoundTag inProgressWrite = NOTHING_TO_WRITE; // only needs to be acquire/release
+
+ boolean failedWrite;
+
+ final ServerLevel world;
+ final int chunkX;
+ final int chunkZ;
+ final RegionFileIOThread.ChunkDataController taskController;
+
+ final PrioritisedExecutor.PrioritisedTask prioritisedTask;
+
+ /*
+ * IO thread will perform reads before writes for a given chunk x and z
+ *
+ * How reads/writes are scheduled:
+ *
+ * If read is scheduled while scheduling write, take no special action and just schedule write
+ * If read is scheduled while scheduling read and no write is scheduled, chain the read task
+ *
+ *
+ * If write is scheduled while scheduling read, use the pending write data and ret immediately (so no read is scheduled)
+ * If write is scheduled while scheduling write (ignore read in progress), overwrite the write in progress data
+ *
+ * This allows the reads and writes to act as if they occur synchronously to the thread scheduling them, however
+ * it fails to properly propagate write failures thanks to writes overwriting each other
+ */
+
+ public ChunkDataTask(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileIOThread.ChunkDataController taskController,
+ final PrioritisedExecutor executor, final PrioritisedExecutor.Priority priority) {
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.taskController = taskController;
+ this.prioritisedTask = executor.createTask(this, priority);
+ }
+
+ @Override
+ public String toString() {
+ return "Task for world: '" + this.world.getWorld().getName() + "' at (" + this.chunkX + "," + this.chunkZ +
+ ") type: " + this.taskController.type.name() + ", hash: " + this.hashCode();
+ }
+
+ @Override
+ public void run() {
+ final RegionFileIOThread.InProgressRead read = this.inProgressRead;
+ final ChunkCoordinate chunkKey = new ChunkCoordinate(CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ));
+
+ if (read != null) {
+ final boolean[] canRead = new boolean[] { true };
+
+ if (read.waiters.isEmpty()) {
+ // cancelled read? go to task controller to confirm
+ final ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> {
+ if (valueInMap == null) {
+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!");
+ }
+ if (valueInMap != ChunkDataTask.this) {
+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!");
+ }
+
+ if (!read.waiters.isEmpty()) { // as per usual IntelliJ is unable to figure out that there are concurrent accesses.
+ return valueInMap;
+ } else {
+ canRead[0] = false;
+ }
+
+ return valueInMap.inProgressWrite == NOTHING_TO_WRITE ? null : valueInMap;
+ });
+
+ if (inMap == null) {
+ // read is cancelled - and no write pending, so we're done
+ return;
+ }
+ // if there is a write in progress, we don't actually have to worry about waiters gaining new entries -
+ // the readers will just use the in progress write, so the value in canRead is good to use without
+ // further synchronisation.
+ }
+
+ if (canRead[0]) {
+ CompoundTag compound = null;
+ Throwable throwable = null;
+
+ try {
+ compound = this.taskController.readData(this.chunkX, this.chunkZ);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ throwable = thr;
+ LOGGER.error("Failed to read chunk data for task: " + this.toString(), thr);
+ }
+ read.complete(this, compound, throwable);
+ }
+ }
+
+ CompoundTag write = this.inProgressWrite;
+
+ if (write == NOTHING_TO_WRITE) {
+ final ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> {
+ if (valueInMap == null) {
+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!");
+ }
+ if (valueInMap != ChunkDataTask.this) {
+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!");
+ }
+ return valueInMap.inProgressWrite == NOTHING_TO_WRITE ? null : valueInMap;
+ });
+
+ if (inMap == null) {
+ return; // set the task value to null, indicating we're done
+ } // else: inProgressWrite changed, so now we have something to write
+ }
+
+ for (;;) {
+ write = this.inProgressWrite;
+ final CompoundTag dataWritten = write;
+
+ boolean failedWrite = false;
+
+ try {
+ this.taskController.writeData(this.chunkX, this.chunkZ, write);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ if (thr instanceof RegionFileStorage.RegionFileSizeException) {
+ final int maxSize = RegionFile.MAX_CHUNK_SIZE / (1024 * 1024);
+ LOGGER.error("Chunk at (" + this.chunkX + "," + this.chunkZ + ") in '" + this.world.getWorld().getName() + "' exceeds max size of " + maxSize + "MiB, it has been deleted from disk.");
+ } else {
+ failedWrite = thr instanceof IOException;
+ LOGGER.error("Failed to write chunk data for task: " + this.toString(), thr);
+ }
+ }
+
+ final boolean finalFailWrite = failedWrite;
+ final boolean[] done = new boolean[] { false };
+
+ this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> {
+ if (valueInMap == null) {
+ throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!");
+ }
+ if (valueInMap != ChunkDataTask.this) {
+ throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!");
+ }
+ if (valueInMap.inProgressWrite == dataWritten) {
+ valueInMap.failedWrite = finalFailWrite;
+ done[0] = true;
+ // keep the data in map if we failed the write so we can try to prevent data loss
+ return finalFailWrite ? valueInMap : null;
+ }
+ // different data than expected, means we need to retry write
+ return valueInMap;
+ });
+
+ if (done[0]) {
+ return;
+ }
+
+ // fetch & write new data
+ continue;
+ }
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java b/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java
new file mode 100644
index 0000000000000000000000000000000000000000..0b7a2b0ead4f3bc07bfd9a38c2b7cf024bd140c6
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java
@@ -0,0 +1,280 @@
+package io.papermc.paper.chunk.system.light;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.starlight.common.light.BlockStarLightEngine;
+import ca.spottedleaf.starlight.common.light.SkyStarLightEngine;
+import ca.spottedleaf.starlight.common.light.StarLightInterface;
+import io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler;
+import io.papermc.paper.util.CoordinateUtils;
+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.shorts.ShortCollection;
+import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.SectionPos;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.BooleanSupplier;
+
+public final class LightQueue {
+
+ protected final Long2ObjectOpenHashMap<ChunkTasks> chunkTasks = new Long2ObjectOpenHashMap<>();
+ protected final StarLightInterface manager;
+ protected final ServerLevel world;
+
+ public LightQueue(final StarLightInterface manager) {
+ this.manager = manager;
+ this.world = ((ServerLevel)manager.getWorld());
+ }
+
+ public void lowerPriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) {
+ final ChunkTasks task;
+ synchronized (this) {
+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+ if (task != null) {
+ task.lowerPriority(priority);
+ }
+ }
+
+ public void setPriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) {
+ final ChunkTasks task;
+ synchronized (this) {
+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+ if (task != null) {
+ task.setPriority(priority);
+ }
+ }
+
+ public void raisePriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) {
+ final ChunkTasks task;
+ synchronized (this) {
+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+ if (task != null) {
+ task.raisePriority(priority);
+ }
+ }
+
+ public PrioritisedExecutor.Priority getPriority(final int chunkX, final int chunkZ) {
+ final ChunkTasks task;
+ synchronized (this) {
+ task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+ if (task != null) {
+ return task.getPriority();
+ }
+
+ return PrioritisedExecutor.Priority.COMPLETING;
+ }
+
+ public boolean isEmpty() {
+ synchronized (this) {
+ return this.chunkTasks.isEmpty();
+ }
+ }
+
+ public CompletableFuture<Void> queueBlockChange(final BlockPos pos) {
+ final ChunkTasks tasks;
+ synchronized (this) {
+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> {
+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this);
+ });
+ tasks.changedPositions.add(pos.immutable());
+ }
+
+ tasks.schedule();
+
+ return tasks.onComplete;
+ }
+
+ public CompletableFuture<Void> queueSectionChange(final SectionPos pos, final boolean newEmptyValue) {
+ final ChunkTasks tasks;
+ synchronized (this) {
+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> {
+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this);
+ });
+
+ if (tasks.changedSectionSet == null) {
+ tasks.changedSectionSet = new Boolean[this.manager.maxSection - this.manager.minSection + 1];
+ }
+ tasks.changedSectionSet[pos.getY() - this.manager.minSection] = Boolean.valueOf(newEmptyValue);
+ }
+
+ tasks.schedule();
+
+ return tasks.onComplete;
+ }
+
+ public CompletableFuture<Void> queueChunkLightTask(final ChunkPos pos, final BooleanSupplier lightTask, final PrioritisedExecutor.Priority priority) {
+ final ChunkTasks tasks;
+ synchronized (this) {
+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> {
+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this, priority);
+ });
+ if (tasks.lightTasks == null) {
+ tasks.lightTasks = new ArrayList<>();
+ }
+ tasks.lightTasks.add(lightTask);
+ }
+
+ tasks.schedule();
+
+ return tasks.onComplete;
+ }
+
+ public CompletableFuture<Void> queueChunkSkylightEdgeCheck(final SectionPos pos, final ShortCollection sections) {
+ final ChunkTasks tasks;
+ synchronized (this) {
+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> {
+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this);
+ });
+
+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksSky;
+ if (queuedEdges == null) {
+ queuedEdges = tasks.queuedEdgeChecksSky = new ShortOpenHashSet();
+ }
+ queuedEdges.addAll(sections);
+ }
+
+ tasks.schedule();
+
+ return tasks.onComplete;
+ }
+
+ public CompletableFuture<Void> queueChunkBlocklightEdgeCheck(final SectionPos pos, final ShortCollection sections) {
+ final ChunkTasks tasks;
+
+ synchronized (this) {
+ tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> {
+ return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this);
+ });
+
+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksBlock;
+ if (queuedEdges == null) {
+ queuedEdges = tasks.queuedEdgeChecksBlock = new ShortOpenHashSet();
+ }
+ queuedEdges.addAll(sections);
+ }
+
+ tasks.schedule();
+
+ return tasks.onComplete;
+ }
+
+ public void removeChunk(final ChunkPos pos) {
+ final ChunkTasks tasks;
+ synchronized (this) {
+ tasks = this.chunkTasks.remove(CoordinateUtils.getChunkKey(pos));
+ }
+ if (tasks != null && tasks.cancel()) {
+ tasks.onComplete.complete(null);
+ }
+ }
+
+ protected static final class ChunkTasks implements Runnable {
+
+ final Set<BlockPos> changedPositions = new HashSet<>();
+ Boolean[] changedSectionSet;
+ ShortOpenHashSet queuedEdgeChecksSky;
+ ShortOpenHashSet queuedEdgeChecksBlock;
+ List<BooleanSupplier> lightTasks;
+
+ final CompletableFuture<Void> onComplete = new CompletableFuture<>();
+
+ public final long chunkCoordinate;
+ private final StarLightInterface lightEngine;
+ private final LightQueue queue;
+ private final PrioritisedExecutor.PrioritisedTask task;
+
+ public ChunkTasks(final long chunkCoordinate, final StarLightInterface lightEngine, final LightQueue queue) {
+ this(chunkCoordinate, lightEngine, queue, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ public ChunkTasks(final long chunkCoordinate, final StarLightInterface lightEngine, final LightQueue queue,
+ final PrioritisedExecutor.Priority priority) {
+ this.chunkCoordinate = chunkCoordinate;
+ this.lightEngine = lightEngine;
+ this.queue = queue;
+ this.task = queue.world.chunkTaskScheduler.lightExecutor.createTask(this, priority);
+ }
+
+ public void schedule() {
+ this.task.queue();
+ }
+
+ public boolean cancel() {
+ return this.task.cancel();
+ }
+
+ public PrioritisedExecutor.Priority getPriority() {
+ return this.task.getPriority();
+ }
+
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ this.task.lowerPriority(priority);
+ }
+
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ this.task.setPriority(priority);
+ }
+
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ this.task.raisePriority(priority);
+ }
+
+ @Override
+ public void run() {
+ final SkyStarLightEngine skyEngine = this.lightEngine.getSkyLightEngine();
+ final BlockStarLightEngine blockEngine = this.lightEngine.getBlockLightEngine();
+ try {
+ synchronized (this.queue) {
+ this.queue.chunkTasks.remove(this.chunkCoordinate);
+ }
+
+ boolean litChunk = false;
+ if (this.lightTasks != null) {
+ for (final BooleanSupplier run : this.lightTasks) {
+ if (run.getAsBoolean()) {
+ litChunk = true;
+ break;
+ }
+ }
+ }
+
+ final long coordinate = this.chunkCoordinate;
+ final int chunkX = CoordinateUtils.getChunkX(coordinate);
+ final int chunkZ = CoordinateUtils.getChunkZ(coordinate);
+
+ final Set<BlockPos> positions = this.changedPositions;
+ final Boolean[] sectionChanges = this.changedSectionSet;
+
+ if (!litChunk) {
+ if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) {
+ skyEngine.blocksChangedInChunk(this.lightEngine.getLightAccess(), chunkX, chunkZ, positions, sectionChanges);
+ }
+ if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) {
+ blockEngine.blocksChangedInChunk(this.lightEngine.getLightAccess(), chunkX, chunkZ, positions, sectionChanges);
+ }
+
+ if (skyEngine != null && this.queuedEdgeChecksSky != null) {
+ skyEngine.checkChunkEdges(this.lightEngine.getLightAccess(), chunkX, chunkZ, this.queuedEdgeChecksSky);
+ }
+ if (blockEngine != null && this.queuedEdgeChecksBlock != null) {
+ blockEngine.checkChunkEdges(this.lightEngine.getLightAccess(), chunkX, chunkZ, this.queuedEdgeChecksBlock);
+ }
+ }
+
+ this.onComplete.complete(null);
+ } finally {
+ this.lightEngine.releaseSkyLightEngine(skyEngine);
+ this.lightEngine.releaseBlockLightEngine(blockEngine);
+ }
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java b/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java
new file mode 100644
index 0000000000000000000000000000000000000000..dc298e61e2d479801c8469b2067a8f8bcb076b1d
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java
@@ -0,0 +1,213 @@
+package io.papermc.paper.chunk.system.poi;
+
+import com.mojang.logging.LogUtils;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.DataResult;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import io.papermc.paper.util.WorldUtil;
+import net.minecraft.SharedConstants;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.NbtOps;
+import net.minecraft.nbt.Tag;
+import net.minecraft.resources.RegistryOps;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.ai.village.poi.PoiManager;
+import net.minecraft.world.entity.ai.village.poi.PoiSection;
+import org.slf4j.Logger;
+
+import java.util.Optional;
+
+public final class PoiChunk {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ public final ServerLevel world;
+ public final int chunkX;
+ public final int chunkZ;
+ public final int minSection;
+ public final int maxSection;
+
+ protected final PoiSection[] sections;
+
+ private boolean isDirty;
+ private boolean loaded;
+
+ public PoiChunk(final ServerLevel world, final int chunkX, final int chunkZ, final int minSection, final int maxSection) {
+ this(world, chunkX, chunkZ, minSection, maxSection, new PoiSection[maxSection - minSection + 1]);
+ }
+
+ public PoiChunk(final ServerLevel world, final int chunkX, final int chunkZ, final int minSection, final int maxSection, final PoiSection[] sections) {
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.minSection = minSection;
+ this.maxSection = maxSection;
+ this.sections = sections;
+ if (this.sections.length != (maxSection - minSection + 1)) {
+ throw new IllegalStateException("Incorrect length used, expected " + (maxSection - minSection + 1) + ", got " + this.sections.length);
+ }
+ }
+
+ public void load() {
+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Loading in poi chunk off-main");
+ if (this.loaded) {
+ return;
+ }
+ this.loaded = true;
+ this.world.chunkSource.getPoiManager().loadInPoiChunk(this);
+ }
+
+ public boolean isLoaded() {
+ return this.loaded;
+ }
+
+ public boolean isEmpty() {
+ for (final PoiSection section : this.sections) {
+ if (section != null && !section.isEmpty()) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ public PoiSection getOrCreateSection(final int chunkY) {
+ if (chunkY >= this.minSection && chunkY <= this.maxSection) {
+ final int idx = chunkY - this.minSection;
+ final PoiSection ret = this.sections[idx];
+ if (ret != null) {
+ return ret;
+ }
+
+ final PoiManager poiManager = this.world.getPoiManager();
+ final long key = CoordinateUtils.getChunkSectionKey(this.chunkX, chunkY, this.chunkZ);
+
+ return this.sections[idx] = new PoiSection(() -> {
+ poiManager.setDirty(key);
+ });
+ }
+ throw new IllegalArgumentException("chunkY is out of bounds, chunkY: " + chunkY + " outside [" + this.minSection + "," + this.maxSection + "]");
+ }
+
+ public PoiSection getSection(final int chunkY) {
+ if (chunkY >= this.minSection && chunkY <= this.maxSection) {
+ return this.sections[chunkY - this.minSection];
+ }
+ return null;
+ }
+
+ public Optional<PoiSection> getSectionForVanilla(final int chunkY) {
+ if (chunkY >= this.minSection && chunkY <= this.maxSection) {
+ final PoiSection ret = this.sections[chunkY - this.minSection];
+ return ret == null ? Optional.empty() : ret.noAllocateOptional;
+ }
+ return Optional.empty();
+ }
+
+ public boolean isDirty() {
+ return this.isDirty;
+ }
+
+ public void setDirty(final boolean dirty) {
+ this.isDirty = dirty;
+ }
+
+ // returns null if empty
+ public CompoundTag save() {
+ final RegistryOps<Tag> registryOps = RegistryOps.create(NbtOps.INSTANCE, world.getPoiManager().registryAccess);
+
+ final CompoundTag ret = new CompoundTag();
+ final CompoundTag sections = new CompoundTag();
+ ret.put("Sections", sections);
+
+ ret.putInt("DataVersion", SharedConstants.getCurrentVersion().getWorldVersion());
+
+ final ServerLevel world = this.world;
+ final PoiManager poiManager = world.getPoiManager();
+ final int chunkX = this.chunkX;
+ final int chunkZ = this.chunkZ;
+
+ for (int sectionY = this.minSection; sectionY <= this.maxSection; ++sectionY) {
+ final PoiSection chunk = this.sections[sectionY - this.minSection];
+ if (chunk == null || chunk.isEmpty()) {
+ continue;
+ }
+
+ final long key = CoordinateUtils.getChunkSectionKey(chunkX, sectionY, chunkZ);
+ // codecs are honestly such a fucking disaster. What the fuck is this trash?
+ final Codec<PoiSection> codec = PoiSection.codec(() -> {
+ poiManager.setDirty(key);
+ });
+
+ final DataResult<Tag> serializedResult = codec.encodeStart(registryOps, chunk);
+ final int finalSectionY = sectionY;
+ final Tag serialized = serializedResult.resultOrPartial((final String description) -> {
+ LOGGER.error("Failed to serialize poi chunk for world: " + world.getWorld().getName() + ", chunk: (" + chunkX + "," + finalSectionY + "," + chunkZ + "); description: " + description);
+ }).orElse(null);
+ if (serialized == null) {
+ // failed, should be logged from the resultOrPartial
+ continue;
+ }
+
+ sections.put(Integer.toString(sectionY), serialized);
+ }
+
+ return sections.isEmpty() ? null : ret;
+ }
+
+ public static PoiChunk empty(final ServerLevel world, final int chunkX, final int chunkZ) {
+ final PoiChunk ret = new PoiChunk(world, chunkX, chunkZ, WorldUtil.getMinSection(world), WorldUtil.getMaxSection(world));
+ ret.loaded = true;
+ return ret;
+ }
+
+ public static PoiChunk parse(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data) {
+ final PoiChunk ret = empty(world, chunkX, chunkZ);
+
+ final RegistryOps<Tag> registryOps = RegistryOps.create(NbtOps.INSTANCE, world.getPoiManager().registryAccess);
+
+ final CompoundTag sections = data.getCompound("Sections");
+
+ if (sections.isEmpty()) {
+ // nothing to parse
+ return ret;
+ }
+
+ final PoiManager poiManager = world.getPoiManager();
+
+ boolean readAnything = false;
+
+ for (int sectionY = ret.minSection; sectionY <= ret.maxSection; ++sectionY) {
+ final String key = Integer.toString(sectionY);
+ if (!sections.contains(key)) {
+ continue;
+ }
+
+ final long coordinateKey = CoordinateUtils.getChunkSectionKey(chunkX, sectionY, chunkZ);
+ // codecs are honestly such a fucking disaster. What the fuck is this trash?
+ final Codec<PoiSection> codec = PoiSection.codec(() -> {
+ poiManager.setDirty(coordinateKey);
+ });
+
+ final CompoundTag section = sections.getCompound(key);
+ final DataResult<PoiSection> deserializeResult = codec.parse(registryOps, section);
+ final int finalSectionY = sectionY;
+ final PoiSection deserialized = deserializeResult.resultOrPartial((final String description) -> {
+ LOGGER.error("Failed to deserialize poi chunk for world: " + world.getWorld().getName() + ", chunk: (" + chunkX + "," + finalSectionY + "," + chunkZ + "); description: " + description);
+ }).orElse(null);
+
+ if (deserialized == null || deserialized.isEmpty()) {
+ // completely empty, no point in storing this
+ continue;
+ }
+
+ readAnything = true;
+ ret.sections[sectionY - ret.minSection] = deserialized;
+ }
+
+ ret.loaded = !readAnything; // Set loaded to false if we read anything to ensure proper callbacks to PoiManager are made on #load
+
+ return ret;
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..fb42d776f15f735fb59e972e00e2b512c23a8387
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java
@@ -0,0 +1,121 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.ImposterProtoChunk;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.ProtoChunk;
+import java.lang.invoke.VarHandle;
+
+public final class ChunkFullTask extends ChunkProgressionTask implements Runnable {
+
+ protected final NewChunkHolder chunkHolder;
+ protected final ChunkAccess fromChunk;
+ protected final PrioritisedExecutor.PrioritisedTask convertToFullTask;
+
+ public ChunkFullTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ,
+ final NewChunkHolder chunkHolder, final ChunkAccess fromChunk, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ);
+ this.chunkHolder = chunkHolder;
+ this.fromChunk = fromChunk;
+ this.convertToFullTask = scheduler.createChunkTask(chunkX, chunkZ, this, priority);
+ }
+
+ @Override
+ public ChunkStatus getTargetStatus() {
+ return ChunkStatus.FULL;
+ }
+
+ @Override
+ public void run() {
+ // See Vanilla protoChunkToFullChunk for what this function should be doing
+ final LevelChunk chunk;
+ try {
+ if (this.fromChunk instanceof ImposterProtoChunk wrappedFull) {
+ chunk = wrappedFull.getWrapped();
+ } else {
+ final ServerLevel world = this.world;
+ final ProtoChunk protoChunk = (ProtoChunk)this.fromChunk;
+ chunk = new LevelChunk(this.world, protoChunk, (final LevelChunk unused) -> {
+ ChunkMap.postLoadProtoChunk(world, protoChunk.getEntities());
+ });
+ }
+
+ chunk.setChunkHolder(this.scheduler.chunkHolderManager.getChunkHolder(this.chunkX, this.chunkZ)); // replaces setFullStatus
+ chunk.runPostLoad();
+ // Unlike Vanilla, we load the entity chunk here, as we load the NBT in empty status (unlike Vanilla)
+ // This brings entity addition back in line with older versions of the game
+ // Since we load the NBT in the empty status, this will never block for I/O
+ this.world.chunkTaskScheduler.chunkHolderManager.getOrCreateEntityChunk(this.chunkX, this.chunkZ, false);
+
+ // we don't need the entitiesInLevel trash, this system doesn't double run callbacks
+ chunk.setLoaded(true);
+ chunk.registerAllBlockEntitiesAfterLevelLoad();
+ chunk.registerTickContainerInLevel(this.world);
+ } catch (final Throwable throwable) {
+ this.complete(null, throwable);
+
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ return;
+ }
+ this.complete(chunk, null);
+ }
+
+ protected volatile boolean scheduled;
+ protected static final VarHandle SCHEDULED_HANDLE = ConcurrentUtil.getVarHandle(ChunkFullTask.class, "scheduled", boolean.class);
+
+ @Override
+ public boolean isScheduled() {
+ return this.scheduled;
+ }
+
+ @Override
+ public void schedule() {
+ if ((boolean)SCHEDULED_HANDLE.getAndSet((ChunkFullTask)this, true)) {
+ throw new IllegalStateException("Cannot double call schedule()");
+ }
+ this.convertToFullTask.queue();
+ }
+
+ @Override
+ public void cancel() {
+ if (this.convertToFullTask.cancel()) {
+ this.complete(null, null);
+ }
+ }
+
+ @Override
+ public PrioritisedExecutor.Priority getPriority() {
+ return this.convertToFullTask.getPriority();
+ }
+
+ @Override
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.convertToFullTask.lowerPriority(priority);
+ }
+
+ @Override
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.convertToFullTask.setPriority(priority);
+ }
+
+ @Override
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.convertToFullTask.raisePriority(priority);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..d220507e1a432883d3092720e3634e8d1d961dbe
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
@@ -0,0 +1,1190 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.map.SWMRLong2ObjectHashTable;
+import co.aikar.timings.Timing;
+import com.google.common.collect.ImmutableList;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.chunk.system.io.RegionFileIOThread;
+import io.papermc.paper.chunk.system.poi.PoiChunk;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import io.papermc.paper.util.misc.Delayed8WayDistancePropagator2D;
+import io.papermc.paper.world.ChunkEntitySlices;
+import it.unimi.dsi.fastutil.longs.Long2IntLinkedOpenHashMap;
+import it.unimi.dsi.fastutil.longs.Long2IntMap;
+import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap;
+import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.longs.LongArrayList;
+import it.unimi.dsi.fastutil.longs.LongIterator;
+import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet;
+import it.unimi.dsi.fastutil.objects.ReferenceLinkedOpenHashSet;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.ChunkSystem;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.Ticket;
+import net.minecraft.server.level.TicketType;
+import net.minecraft.util.SortedArraySet;
+import net.minecraft.util.Unit;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import org.bukkit.plugin.Plugin;
+import org.slf4j.Logger;
+import java.io.IOException;
+import java.text.DecimalFormat;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.concurrent.locks.LockSupport;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.function.Predicate;
+
+public final class ChunkHolderManager {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ public static final int FULL_LOADED_TICKET_LEVEL = 33;
+ public static final int BLOCK_TICKING_TICKET_LEVEL = 32;
+ public static final int ENTITY_TICKING_TICKET_LEVEL = 31;
+ public static final int MAX_TICKET_LEVEL = ChunkMap.MAX_CHUNK_DISTANCE; // inclusive
+
+ private static final long NO_TIMEOUT_MARKER = -1L;
+
+ final ReentrantLock ticketLock = new ReentrantLock();
+
+ private final SWMRLong2ObjectHashTable<NewChunkHolder> chunkHolders = new SWMRLong2ObjectHashTable<>(16384, 0.25f);
+ private final Long2ObjectOpenHashMap<SortedArraySet<Ticket<?>>> tickets = new Long2ObjectOpenHashMap<>(8192, 0.25f);
+ // what a disaster of a name
+ // this is a map of removal tick to a map of chunks and the number of tickets a chunk has that are to expire that tick
+ private final Long2ObjectOpenHashMap<Long2IntOpenHashMap> removeTickToChunkExpireTicketCount = new Long2ObjectOpenHashMap<>();
+ private final ServerLevel world;
+ private final ChunkTaskScheduler taskScheduler;
+ private long currentTick;
+
+ private final ArrayDeque<NewChunkHolder> pendingFullLoadUpdate = new ArrayDeque<>();
+ private final ObjectRBTreeSet<NewChunkHolder> autoSaveQueue = new ObjectRBTreeSet<>((final NewChunkHolder c1, final NewChunkHolder c2) -> {
+ if (c1 == c2) {
+ return 0;
+ }
+
+ final int saveTickCompare = Long.compare(c1.lastAutoSave, c2.lastAutoSave);
+
+ if (saveTickCompare != 0) {
+ return saveTickCompare;
+ }
+
+ final long coord1 = CoordinateUtils.getChunkKey(c1.chunkX, c1.chunkZ);
+ final long coord2 = CoordinateUtils.getChunkKey(c2.chunkX, c2.chunkZ);
+
+ if (coord1 == coord2) {
+ throw new IllegalStateException("Duplicate chunkholder in auto save queue");
+ }
+
+ return Long.compare(coord1, coord2);
+ });
+
+ public ChunkHolderManager(final ServerLevel world, final ChunkTaskScheduler taskScheduler) {
+ this.world = world;
+ this.taskScheduler = taskScheduler;
+ }
+
+ private long statusUpgradeId;
+
+ long getNextStatusUpgradeId() {
+ return ++this.statusUpgradeId;
+ }
+
+ public List<ChunkHolder> getOldChunkHolders() {
+ final List<NewChunkHolder> holders = this.getChunkHolders();
+ final List<ChunkHolder> ret = new ArrayList<>(holders.size());
+ for (final NewChunkHolder holder : holders) {
+ ret.add(holder.vanillaChunkHolder);
+ }
+ return ret;
+ }
+
+ public List<NewChunkHolder> getChunkHolders() {
+ final List<NewChunkHolder> ret = new ArrayList<>(this.chunkHolders.size());
+ this.chunkHolders.forEachValue(ret::add);
+ return ret;
+ }
+
+ public int size() {
+ return this.chunkHolders.size();
+ }
+
+ public void close(final boolean save, final boolean halt) {
+ TickThread.ensureTickThread("Closing world off-main");
+ if (halt) {
+ LOGGER.info("Waiting 60s for chunk system to halt for world '" + this.world.getWorld().getName() + "'");
+ if (!this.taskScheduler.halt(true, TimeUnit.SECONDS.toNanos(60L))) {
+ LOGGER.warn("Failed to halt world generation/loading tasks for world '" + this.world.getWorld().getName() + "'");
+ } else {
+ LOGGER.info("Halted chunk system for world '" + this.world.getWorld().getName() + "'");
+ }
+ }
+
+ if (save) {
+ this.saveAllChunks(true, true, true);
+ }
+
+ if (this.world.chunkDataControllerNew.hasTasks() || this.world.entityDataControllerNew.hasTasks() || this.world.poiDataControllerNew.hasTasks()) {
+ RegionFileIOThread.flush();
+ }
+
+ // kill regionfile cache
+ try {
+ this.world.chunkDataControllerNew.getCache().close();
+ } catch (final IOException ex) {
+ LOGGER.error("Failed to close chunk regionfile cache for world '" + this.world.getWorld().getName() + "'", ex);
+ }
+ try {
+ this.world.entityDataControllerNew.getCache().close();
+ } catch (final IOException ex) {
+ LOGGER.error("Failed to close entity regionfile cache for world '" + this.world.getWorld().getName() + "'", ex);
+ }
+ try {
+ this.world.poiDataControllerNew.getCache().close();
+ } catch (final IOException ex) {
+ LOGGER.error("Failed to close poi regionfile cache for world '" + this.world.getWorld().getName() + "'", ex);
+ }
+ }
+
+ void ensureInAutosave(final NewChunkHolder holder) {
+ if (!this.autoSaveQueue.contains(holder)) {
+ holder.lastAutoSave = MinecraftServer.currentTick;
+ this.autoSaveQueue.add(holder);
+ }
+ }
+
+ public void autoSave() {
+ final List<NewChunkHolder> reschedule = new ArrayList<>();
+ final long currentTick = MinecraftServer.currentTickLong;
+ final long maxSaveTime = currentTick - this.world.paperConfig().chunks.autoSaveInterval.value();
+ for (int autoSaved = 0; autoSaved < this.world.paperConfig().chunks.maxAutoSaveChunksPerTick && !this.autoSaveQueue.isEmpty();) {
+ final NewChunkHolder holder = this.autoSaveQueue.first();
+
+ if (holder.lastAutoSave > maxSaveTime) {
+ break;
+ }
+
+ this.autoSaveQueue.remove(holder);
+
+ holder.lastAutoSave = currentTick;
+ if (holder.save(false, false)) {
+ ++autoSaved;
+ }
+
+ if (holder.getChunkStatus().isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ reschedule.add(holder);
+ }
+ }
+
+ for (final NewChunkHolder holder : reschedule) {
+ if (holder.getChunkStatus().isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ this.autoSaveQueue.add(holder);
+ }
+ }
+ }
+
+ public void saveAllChunks(final boolean flush, final boolean shutdown, final boolean logProgress) {
+ final List<NewChunkHolder> holders = this.getChunkHolders();
+
+ if (logProgress) {
+ LOGGER.info("Saving all chunkholders for world '" + this.world.getWorld().getName() + "'");
+ }
+
+ final DecimalFormat format = new DecimalFormat("#0.00");
+
+ int saved = 0;
+
+ long start = System.nanoTime();
+ long lastLog = start;
+ boolean needsFlush = false;
+ final int flushInterval = 50;
+
+ for (int i = 0, len = holders.size(); i < len; ++i) {
+ final NewChunkHolder holder = holders.get(i);
+ try {
+ if (holder.save(shutdown, false)) {
+ ++saved;
+ needsFlush = flush;
+ }
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to save chunk (" + holder.chunkX + "," + holder.chunkZ + ") in world '" + this.world.getWorld().getName() + "'", thr);
+ }
+ if (needsFlush && (saved % flushInterval) == 0) {
+ needsFlush = false;
+ RegionFileIOThread.partialFlush(flushInterval / 2);
+ }
+ if (logProgress) {
+ final long currTime = System.nanoTime();
+ if ((currTime - lastLog) > TimeUnit.SECONDS.toNanos(10L)) {
+ lastLog = currTime;
+ LOGGER.info("Saved " + saved + " chunks (" + format.format((double)(i+1)/(double)len * 100.0) + "%) in world '" + this.world.getWorld().getName() + "'");
+ }
+ }
+ }
+ if (flush) {
+ RegionFileIOThread.flush();
+ }
+ if (logProgress) {
+ LOGGER.info("Saved " + saved + " chunks in world '" + this.world.getWorld().getName() + "' in " + TimeUnit.NANOSECONDS.toSeconds(System.nanoTime() - start) + "s");
+ }
+ }
+
+ protected final Long2IntLinkedOpenHashMap ticketLevelUpdates = new Long2IntLinkedOpenHashMap() {
+ @Override
+ protected void rehash(final int newN) {
+ // no downsizing allowed
+ if (newN < this.n) {
+ return;
+ }
+ super.rehash(newN);
+ }
+ };
+
+ protected final Delayed8WayDistancePropagator2D ticketLevelPropagator = new Delayed8WayDistancePropagator2D(
+ (final long coordinate, final byte oldLevel, final byte newLevel) -> {
+ ChunkHolderManager.this.ticketLevelUpdates.putAndMoveToLast(coordinate, convertBetweenTicketLevels(newLevel));
+ }
+ );
+ // function for converting between ticket levels and propagator levels and vice versa
+ // the problem is the ticket level propagator will propagate from a set source down to zero, whereas mojang expects
+ // levels to propagate from a set value up to a maximum value. so we need to convert the levels we put into the propagator
+ // and the levels we get out of the propagator
+
+ public static int convertBetweenTicketLevels(final int level) {
+ return ChunkMap.MAX_CHUNK_DISTANCE - level + 1;
+ }
+
+ public boolean hasTickets() {
+ this.ticketLock.lock();
+ try {
+ return !this.tickets.isEmpty();
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ public String getTicketDebugString(final long coordinate) {
+ this.ticketLock.lock();
+ try {
+ final SortedArraySet<Ticket<?>> tickets = this.tickets.get(coordinate);
+
+ return tickets != null ? tickets.first().toString() : "no_ticket";
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ public Long2ObjectOpenHashMap<SortedArraySet<Ticket<?>>> getTicketsCopy() {
+ this.ticketLock.lock();
+ try {
+ return this.tickets.clone();
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ public Collection<Plugin> getPluginChunkTickets(int x, int z) {
+ ImmutableList.Builder<Plugin> ret;
+ this.ticketLock.lock();
+ try {
+ SortedArraySet<Ticket<?>> tickets = this.tickets.get(ChunkPos.asLong(x, z));
+
+ if (tickets == null) {
+ return Collections.emptyList();
+ }
+
+ ret = ImmutableList.builder();
+ for (Ticket<?> ticket : tickets) {
+ if (ticket.getType() == TicketType.PLUGIN_TICKET) {
+ ret.add((Plugin)ticket.key);
+ }
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+
+ return ret.build();
+ }
+
+ protected final int getPropagatedTicketLevel(final long coordinate) {
+ return convertBetweenTicketLevels(this.ticketLevelPropagator.getLevel(coordinate));
+ }
+
+ protected final void updateTicketLevel(final long coordinate, final int ticketLevel) {
+ if (ticketLevel > ChunkMap.MAX_CHUNK_DISTANCE) {
+ this.ticketLevelPropagator.removeSource(coordinate);
+ } else {
+ this.ticketLevelPropagator.setSource(coordinate, convertBetweenTicketLevels(ticketLevel));
+ }
+ }
+
+ private static int getTicketLevelAt(SortedArraySet<Ticket<?>> tickets) {
+ return !tickets.isEmpty() ? tickets.first().getTicketLevel() : MAX_TICKET_LEVEL + 1;
+ }
+
+ public <T> boolean addTicketAtLevel(final TicketType<T> type, final ChunkPos chunkPos, final int level,
+ final T identifier) {
+ return this.addTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkPos), level, identifier);
+ }
+
+ public <T> boolean addTicketAtLevel(final TicketType<T> type, final int chunkX, final int chunkZ, final int level,
+ final T identifier) {
+ return this.addTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkX, chunkZ), level, identifier);
+ }
+
+ // supposed to return true if the ticket was added and did not replace another
+ // but, we always return false if the ticket cannot be added
+ public <T> boolean addTicketAtLevel(final TicketType<T> type, final long chunk, final int level, final T identifier) {
+ final long removeDelay = Math.max(0, type.timeout);
+ if (level > MAX_TICKET_LEVEL) {
+ return false;
+ }
+
+ this.ticketLock.lock();
+ try {
+ final long removeTick = removeDelay == 0 ? NO_TIMEOUT_MARKER : this.currentTick + removeDelay;
+ final Ticket<T> ticket = new Ticket<>(type, level, identifier, removeTick);
+
+ final SortedArraySet<Ticket<?>> ticketsAtChunk = this.tickets.computeIfAbsent(chunk, (final long keyInMap) -> {
+ return SortedArraySet.create(4);
+ });
+
+ final int levelBefore = getTicketLevelAt(ticketsAtChunk);
+ final Ticket<T> current = (Ticket<T>)ticketsAtChunk.replace(ticket);
+ final int levelAfter = getTicketLevelAt(ticketsAtChunk);
+
+ if (current != ticket) {
+ final long oldRemovalTick = current.removalTick;
+ if (removeTick != oldRemovalTick) {
+ if (oldRemovalTick != NO_TIMEOUT_MARKER) {
+ final Long2IntOpenHashMap removeCounts = this.removeTickToChunkExpireTicketCount.get(oldRemovalTick);
+ final int prevCount = removeCounts.addTo(chunk, -1);
+
+ if (prevCount == 1) {
+ removeCounts.remove(chunk);
+ if (removeCounts.isEmpty()) {
+ this.removeTickToChunkExpireTicketCount.remove(oldRemovalTick);
+ }
+ }
+ }
+ if (removeTick != NO_TIMEOUT_MARKER) {
+ this.removeTickToChunkExpireTicketCount.computeIfAbsent(removeTick, (final long keyInMap) -> {
+ return new Long2IntOpenHashMap();
+ }).addTo(chunk, 1);
+ }
+ }
+ } else {
+ if (removeTick != NO_TIMEOUT_MARKER) {
+ this.removeTickToChunkExpireTicketCount.computeIfAbsent(removeTick, (final long keyInMap) -> {
+ return new Long2IntOpenHashMap();
+ }).addTo(chunk, 1);
+ }
+ }
+
+ if (levelBefore != levelAfter) {
+ this.updateTicketLevel(chunk, levelAfter);
+ }
+
+ return current == ticket;
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ public <T> boolean removeTicketAtLevel(final TicketType<T> type, final ChunkPos chunkPos, final int level, final T identifier) {
+ return this.removeTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkPos), level, identifier);
+ }
+
+ public <T> boolean removeTicketAtLevel(final TicketType<T> type, final int chunkX, final int chunkZ, final int level, final T identifier) {
+ return this.removeTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkX, chunkZ), level, identifier);
+ }
+
+ public <T> boolean removeTicketAtLevel(final TicketType<T> type, final long chunk, final int level, final T identifier) {
+ if (level > MAX_TICKET_LEVEL) {
+ return false;
+ }
+
+ this.ticketLock.lock();
+ try {
+ final SortedArraySet<Ticket<?>> ticketsAtChunk = this.tickets.get(chunk);
+ if (ticketsAtChunk == null) {
+ return false;
+ }
+
+ final int oldLevel = getTicketLevelAt(ticketsAtChunk);
+ final Ticket<T> ticket = (Ticket<T>)ticketsAtChunk.removeAndGet(new Ticket<>(type, level, identifier, -2L));
+
+ if (ticket == null) {
+ return false;
+ }
+
+ if (ticketsAtChunk.isEmpty()) {
+ this.tickets.remove(chunk);
+ }
+
+ final int newLevel = getTicketLevelAt(ticketsAtChunk);
+
+ final long removeTick = ticket.removalTick;
+ if (removeTick != NO_TIMEOUT_MARKER) {
+ final Long2IntOpenHashMap removeCounts = this.removeTickToChunkExpireTicketCount.get(removeTick);
+ final int currCount = removeCounts.addTo(chunk, -1);
+
+ if (currCount == 1) {
+ removeCounts.remove(chunk);
+ if (removeCounts.isEmpty()) {
+ this.removeTickToChunkExpireTicketCount.remove(removeTick);
+ }
+ }
+ }
+
+ if (oldLevel != newLevel) {
+ this.updateTicketLevel(chunk, newLevel);
+ }
+
+ return true;
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ // atomic with respect to all add/remove/addandremove ticket calls for the given chunk
+ public <T, V> void addAndRemoveTickets(final long chunk, final TicketType<T> addType, final int addLevel, final T addIdentifier,
+ final TicketType<V> removeType, final int removeLevel, final V removeIdentifier) {
+ this.ticketLock.lock();
+ try {
+ this.addTicketAtLevel(addType, chunk, addLevel, addIdentifier);
+ this.removeTicketAtLevel(removeType, chunk, removeLevel, removeIdentifier);
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ public <T> void removeAllTicketsFor(final TicketType<T> ticketType, final int ticketLevel, final T ticketIdentifier) {
+ if (ticketLevel > MAX_TICKET_LEVEL) {
+ return;
+ }
+
+ this.ticketLock.lock();
+ try {
+ for (final LongIterator iterator = new LongArrayList(this.tickets.keySet()).longIterator(); iterator.hasNext();) {
+ final long chunk = iterator.nextLong();
+
+ this.removeTicketAtLevel(ticketType, chunk, ticketLevel, ticketIdentifier);
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ public void tick() {
+ TickThread.ensureTickThread("Cannot tick ticket manager off-main");
+
+ this.ticketLock.lock();
+ try {
+ final long tick = ++this.currentTick;
+
+ final Long2IntOpenHashMap toRemove = this.removeTickToChunkExpireTicketCount.remove(tick);
+
+ if (toRemove == null) {
+ return;
+ }
+
+ final Predicate<Ticket<?>> expireNow = (final Ticket<?> ticket) -> {
+ return ticket.removalTick == tick;
+ };
+
+ for (final LongIterator iterator = toRemove.keySet().longIterator(); iterator.hasNext();) {
+ final long chunk = iterator.nextLong();
+
+ final SortedArraySet<Ticket<?>> tickets = this.tickets.get(chunk);
+ tickets.removeIf(expireNow);
+ if (tickets.isEmpty()) {
+ this.tickets.remove(chunk);
+ this.ticketLevelPropagator.removeSource(chunk);
+ } else {
+ this.ticketLevelPropagator.setSource(chunk, convertBetweenTicketLevels(tickets.first().getTicketLevel()));
+ }
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+
+ this.processTicketUpdates();
+ }
+
+ public NewChunkHolder getChunkHolder(final int chunkX, final int chunkZ) {
+ return this.chunkHolders.get(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+
+ public NewChunkHolder getChunkHolder(final long position) {
+ return this.chunkHolders.get(position);
+ }
+
+ public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
+ final NewChunkHolder chunkHolder = this.getChunkHolder(x, z);
+ if (chunkHolder != null) {
+ chunkHolder.raisePriority(priority);
+ }
+ }
+
+ public void setPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
+ final NewChunkHolder chunkHolder = this.getChunkHolder(x, z);
+ if (chunkHolder != null) {
+ chunkHolder.setPriority(priority);
+ }
+ }
+
+ public void lowerPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
+ final NewChunkHolder chunkHolder = this.getChunkHolder(x, z);
+ if (chunkHolder != null) {
+ chunkHolder.lowerPriority(priority);
+ }
+ }
+
+ private NewChunkHolder createChunkHolder(final long position) {
+ final NewChunkHolder ret = new NewChunkHolder(this.world, CoordinateUtils.getChunkX(position), CoordinateUtils.getChunkZ(position), this.taskScheduler);
+
+ ChunkSystem.onChunkHolderCreate(this.world, ret.vanillaChunkHolder);
+ ret.vanillaChunkHolder.onChunkAdd();
+
+ return ret;
+ }
+
+ // because this function creates the chunk holder without a ticket, it is the caller's responsibility to ensure
+ // the chunk holder eventually unloads. this should only be used to avoid using processTicketUpdates to create chunkholders,
+ // as processTicketUpdates may call plugin logic; in every other case a ticket is appropriate
+ private NewChunkHolder getOrCreateChunkHolder(final int chunkX, final int chunkZ) {
+ return this.getOrCreateChunkHolder(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ }
+
+ private NewChunkHolder getOrCreateChunkHolder(final long position) {
+ if (!this.ticketLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Must hold ticket level update lock!");
+ }
+ if (!this.taskScheduler.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Must hold scheduler lock!!");
+ }
+
+ // we could just acquire these locks, but...
+ // must own the locks because the caller needs to ensure that no unload can occur AFTER this function returns
+
+ NewChunkHolder current = this.chunkHolders.get(position);
+ if (current != null) {
+ return current;
+ }
+
+ current = this.createChunkHolder(position);
+ this.chunkHolders.put(position, current);
+
+ return current;
+ }
+
+ private long entityLoadCounter;
+
+ public ChunkEntitySlices getOrCreateEntityChunk(final int chunkX, final int chunkZ, final boolean transientChunk) {
+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot create entity chunk off-main");
+ ChunkEntitySlices ret;
+
+ NewChunkHolder current = this.getChunkHolder(chunkX, chunkZ);
+ if (current != null && (ret = current.getEntityChunk()) != null && (transientChunk || !ret.isTransient())) {
+ return ret;
+ }
+
+ final AtomicBoolean isCompleted = new AtomicBoolean();
+ final Thread waiter = Thread.currentThread();
+ final Long entityLoadId;
+ NewChunkHolder.GenericDataLoadTaskCallback loadTask = null;
+ this.ticketLock.lock();
+ try {
+ entityLoadId = Long.valueOf(this.entityLoadCounter++);
+ this.addTicketAtLevel(TicketType.ENTITY_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, entityLoadId);
+ this.taskScheduler.schedulingLock.lock();
+ try {
+ current = this.getOrCreateChunkHolder(chunkX, chunkZ);
+ if ((ret = current.getEntityChunk()) != null && (transientChunk || !ret.isTransient())) {
+ this.removeTicketAtLevel(TicketType.ENTITY_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, entityLoadId);
+ return ret;
+ }
+
+ if (current.isEntityChunkNBTLoaded()) {
+ isCompleted.setPlain(true);
+ } else {
+ loadTask = current.getOrLoadEntityData((final GenericDataLoadTask.TaskResult<CompoundTag, Throwable> result) -> {
+ if (!transientChunk) {
+ isCompleted.set(true);
+ LockSupport.unpark(waiter);
+ }
+ });
+ final ChunkLoadTask.EntityDataLoadTask entityLoad = current.getEntityDataLoadTask();
+
+ if (entityLoad != null && !transientChunk) {
+ entityLoad.raisePriority(PrioritisedExecutor.Priority.BLOCKING);
+ }
+ }
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+
+ if (loadTask != null) {
+ loadTask.schedule();
+ }
+
+ if (!transientChunk) {
+ // Note: no need to busy wait on the chunk queue, entity load will complete off-main
+ boolean interrupted = false;
+ while (!isCompleted.get()) {
+ interrupted |= Thread.interrupted();
+ LockSupport.park();
+ }
+
+ if (interrupted) {
+ Thread.currentThread().interrupt();
+ }
+ }
+
+ // now that the entity data is loaded, we can load it into the world
+
+ ret = current.loadInEntityChunk(transientChunk);
+
+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+ this.addAndRemoveTickets(chunkKey,
+ TicketType.UNKNOWN, MAX_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ),
+ TicketType.ENTITY_LOAD, MAX_TICKET_LEVEL, entityLoadId
+ );
+
+ return ret;
+ }
+
+ public PoiChunk getPoiChunkIfLoaded(final int chunkX, final int chunkZ, final boolean checkLoadInCallback) {
+ final NewChunkHolder holder = this.getChunkHolder(chunkX, chunkZ);
+ if (holder != null) {
+ final PoiChunk ret = holder.getPoiChunk();
+ return ret == null || (checkLoadInCallback && !ret.isLoaded()) ? null : ret;
+ }
+ return null;
+ }
+
+ private long poiLoadCounter;
+
+ public PoiChunk loadPoiChunk(final int chunkX, final int chunkZ) {
+ TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot create poi chunk off-main");
+ PoiChunk ret;
+
+ NewChunkHolder current = this.getChunkHolder(chunkX, chunkZ);
+ if (current != null && (ret = current.getPoiChunk()) != null) {
+ if (!ret.isLoaded()) {
+ ret.load();
+ }
+ return ret;
+ }
+
+ final AtomicReference<PoiChunk> completed = new AtomicReference<>();
+ final AtomicBoolean isCompleted = new AtomicBoolean();
+ final Thread waiter = Thread.currentThread();
+ final Long poiLoadId;
+ NewChunkHolder.GenericDataLoadTaskCallback loadTask = null;
+ this.ticketLock.lock();
+ try {
+ poiLoadId = Long.valueOf(this.poiLoadCounter++);
+ this.addTicketAtLevel(TicketType.POI_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, poiLoadId);
+ this.taskScheduler.schedulingLock.lock();
+ try {
+ current = this.getOrCreateChunkHolder(chunkX, chunkZ);
+ if (current.isPoiChunkLoaded()) {
+ this.removeTicketAtLevel(TicketType.POI_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, poiLoadId);
+ return current.getPoiChunk();
+ }
+
+ loadTask = current.getOrLoadPoiData((final GenericDataLoadTask.TaskResult<PoiChunk, Throwable> result) -> {
+ completed.setPlain(result.left());
+ isCompleted.set(true);
+ LockSupport.unpark(waiter);
+ });
+ final ChunkLoadTask.PoiDataLoadTask poiLoad = current.getPoiDataLoadTask();
+
+ if (poiLoad != null) {
+ poiLoad.raisePriority(PrioritisedExecutor.Priority.BLOCKING);
+ }
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+
+ if (loadTask != null) {
+ loadTask.schedule();
+ }
+
+ // Note: no need to busy wait on the chunk queue, poi load will complete off-main
+
+ boolean interrupted = false;
+ while (!isCompleted.get()) {
+ interrupted |= Thread.interrupted();
+ LockSupport.park();
+ }
+
+ if (interrupted) {
+ Thread.currentThread().interrupt();
+ }
+
+ ret = completed.getPlain();
+
+ ret.load();
+
+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+ this.addAndRemoveTickets(chunkKey,
+ TicketType.UNKNOWN, MAX_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ),
+ TicketType.POI_LOAD, MAX_TICKET_LEVEL, poiLoadId
+ );
+
+ return ret;
+ }
+
+ void addChangedStatuses(final List<NewChunkHolder> changedFullStatus) {
+ if (changedFullStatus.isEmpty()) {
+ return;
+ }
+ if (!TickThread.isTickThread()) {
+ this.taskScheduler.scheduleChunkTask(() -> {
+ final ArrayDeque<NewChunkHolder> pendingFullLoadUpdate = ChunkHolderManager.this.pendingFullLoadUpdate;
+ for (int i = 0, len = changedFullStatus.size(); i < len; ++i) {
+ pendingFullLoadUpdate.add(changedFullStatus.get(i));
+ }
+
+ ChunkHolderManager.this.processPendingFullUpdate();
+ }, PrioritisedExecutor.Priority.HIGHEST);
+ } else {
+ final ArrayDeque<NewChunkHolder> pendingFullLoadUpdate = this.pendingFullLoadUpdate;
+ for (int i = 0, len = changedFullStatus.size(); i < len; ++i) {
+ pendingFullLoadUpdate.add(changedFullStatus.get(i));
+ }
+ }
+ }
+
+ final ReferenceLinkedOpenHashSet<NewChunkHolder> unloadQueue = new ReferenceLinkedOpenHashSet<>();
+
+ private void removeChunkHolder(final NewChunkHolder holder) {
+ holder.killed = true;
+ holder.vanillaChunkHolder.onChunkRemove();
+ this.autoSaveQueue.remove(holder);
+ ChunkSystem.onChunkHolderDelete(this.world, holder.vanillaChunkHolder);
+ this.chunkHolders.remove(CoordinateUtils.getChunkKey(holder.chunkX, holder.chunkZ));
+ }
+
+ // note: never call while inside the chunk system, this will absolutely break everything
+ public void processUnloads() {
+ TickThread.ensureTickThread("Cannot unload chunks off-main");
+
+ if (BLOCK_TICKET_UPDATES.get() == Boolean.TRUE) {
+ throw new IllegalStateException("Cannot unload chunks recursively");
+ }
+ if (this.ticketLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot hold ticket update lock while calling processUnloads");
+ }
+ if (this.taskScheduler.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot hold scheduling lock while calling processUnloads");
+ }
+
+ final List<NewChunkHolder.UnloadState> unloadQueue;
+ final List<ChunkProgressionTask> scheduleList = new ArrayList<>();
+ this.ticketLock.lock();
+ try {
+ this.taskScheduler.schedulingLock.lock();
+ try {
+ if (this.unloadQueue.isEmpty()) {
+ return;
+ }
+ // in order to ensure all chunks in the unload queue do not have a pending ticket level update,
+ // process them now
+ this.processTicketUpdates(false, false, scheduleList);
+ unloadQueue = new ArrayList<>((int)(this.unloadQueue.size() * 0.05) + 1);
+
+ final int unloadCount = Math.max(50, (int)(this.unloadQueue.size() * 0.05));
+ for (int i = 0; i < unloadCount && !this.unloadQueue.isEmpty(); ++i) {
+ final NewChunkHolder chunkHolder = this.unloadQueue.removeFirst();
+ if (chunkHolder.isSafeToUnload() != null) {
+ LOGGER.error("Chunkholder " + chunkHolder + " is not safe to unload but is inside the unload queue?");
+ continue;
+ }
+ final NewChunkHolder.UnloadState state = chunkHolder.unloadStage1();
+ if (state == null) {
+ // can unload immediately
+ this.removeChunkHolder(chunkHolder);
+ continue;
+ }
+ unloadQueue.add(state);
+ }
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+ // schedule tasks, we can't let processTicketUpdates do this because we call it holding the schedule lock
+ for (int i = 0, len = scheduleList.size(); i < len; ++i) {
+ scheduleList.get(i).schedule();
+ }
+
+ final List<NewChunkHolder> toRemove = new ArrayList<>(unloadQueue.size());
+
+ final Boolean before = this.blockTicketUpdates();
+ try {
+ for (int i = 0, len = unloadQueue.size(); i < len; ++i) {
+ final NewChunkHolder.UnloadState state = unloadQueue.get(i);
+ final NewChunkHolder holder = state.holder();
+
+ holder.unloadStage2(state);
+ toRemove.add(holder);
+ }
+ } finally {
+ this.unblockTicketUpdates(before);
+ }
+
+ this.ticketLock.lock();
+ try {
+ this.taskScheduler.schedulingLock.lock();
+ try {
+ for (int i = 0, len = toRemove.size(); i < len; ++i) {
+ final NewChunkHolder holder = toRemove.get(i);
+
+ if (holder.unloadStage3()) {
+ this.removeChunkHolder(holder);
+ } else {
+ // add cooldown so the next unload check is not immediately next tick
+ this.addTicketAtLevel(TicketType.UNLOAD_COOLDOWN, holder.chunkX, holder.chunkZ, MAX_TICKET_LEVEL, Unit.INSTANCE);
+ }
+ }
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+
+ private final ThreadLocal<Boolean> BLOCK_TICKET_UPDATES = ThreadLocal.withInitial(() -> {
+ return Boolean.FALSE;
+ });
+
+ public Boolean blockTicketUpdates() {
+ final Boolean ret = BLOCK_TICKET_UPDATES.get();
+ BLOCK_TICKET_UPDATES.set(Boolean.TRUE);
+ return ret;
+ }
+
+ public void unblockTicketUpdates(final Boolean before) {
+ BLOCK_TICKET_UPDATES.set(before);
+ }
+
+ public boolean processTicketUpdates() {
+ return this.processTicketUpdates(true, true, null);
+ }
+
+ private static final ThreadLocal<List<ChunkProgressionTask>> CURRENT_TICKET_UPDATE_SCHEDULING = new ThreadLocal<>();
+
+ static List<ChunkProgressionTask> getCurrentTicketUpdateScheduling() {
+ return CURRENT_TICKET_UPDATE_SCHEDULING.get();
+ }
+
+ private boolean processTicketUpdates(final boolean checkLocks, final boolean processFullUpdates, List<ChunkProgressionTask> scheduledTasks) {
+ TickThread.ensureTickThread("Cannot process ticket levels off-main");
+ if (BLOCK_TICKET_UPDATES.get() == Boolean.TRUE) {
+ throw new IllegalStateException("Cannot update ticket level while unloading chunks or updating entity manager");
+ }
+ if (checkLocks && this.ticketLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Illegal recursive processTicketUpdates!");
+ }
+ if (checkLocks && this.taskScheduler.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot update ticket levels from a scheduler context!");
+ }
+
+ List<NewChunkHolder> changedFullStatus = null;
+
+ final boolean isTickThread = TickThread.isTickThread();
+
+ boolean ret = false;
+ final boolean canProcessFullUpdates = processFullUpdates & isTickThread;
+ final boolean canProcessScheduling = scheduledTasks == null;
+
+ this.ticketLock.lock();
+ try {
+ final boolean levelsUpdated = this.ticketLevelPropagator.propagateUpdates();
+ if (levelsUpdated) {
+ // Unlike CB, ticket level updates cannot happen recursively. Thank god.
+ if (!this.ticketLevelUpdates.isEmpty()) {
+ ret = true;
+
+ // first the necessary chunkholders must be created, so just update the ticket levels
+ for (final Iterator<Long2IntMap.Entry> iterator = this.ticketLevelUpdates.long2IntEntrySet().fastIterator(); iterator.hasNext();) {
+ final Long2IntMap.Entry entry = iterator.next();
+ final long key = entry.getLongKey();
+ final int newLevel = entry.getIntValue();
+
+ NewChunkHolder current = this.chunkHolders.get(key);
+ if (current == null && newLevel > MAX_TICKET_LEVEL) {
+ // not loaded and it shouldn't be loaded!
+ iterator.remove();
+ continue;
+ }
+
+ final int currentLevel = current == null ? MAX_TICKET_LEVEL + 1 : current.getCurrentTicketLevel();
+ if (currentLevel == newLevel) {
+ // nothing to do
+ iterator.remove();
+ continue;
+ }
+
+ if (current == null) {
+ // must create
+ current = this.createChunkHolder(key);
+ this.chunkHolders.put(key, current);
+ current.updateTicketLevel(newLevel);
+ } else {
+ current.updateTicketLevel(newLevel);
+ }
+ }
+
+ if (scheduledTasks == null) {
+ scheduledTasks = new ArrayList<>();
+ }
+ changedFullStatus = new ArrayList<>();
+
+ // allow the chunkholders to process ticket level updates without needing to acquire the schedule lock every time
+ final List<ChunkProgressionTask> prev = CURRENT_TICKET_UPDATE_SCHEDULING.get();
+ CURRENT_TICKET_UPDATE_SCHEDULING.set(scheduledTasks);
+ try {
+ this.taskScheduler.schedulingLock.lock();
+ try {
+ for (final Iterator<Long2IntMap.Entry> iterator = this.ticketLevelUpdates.long2IntEntrySet().fastIterator(); iterator.hasNext();) {
+ final Long2IntMap.Entry entry = iterator.next();
+ final long key = entry.getLongKey();
+ final NewChunkHolder current = this.chunkHolders.get(key);
+
+ if (current == null) {
+ throw new IllegalStateException("Expected chunk holder to be created");
+ }
+
+ current.processTicketLevelUpdate(scheduledTasks, changedFullStatus);
+ }
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ } finally {
+ CURRENT_TICKET_UPDATE_SCHEDULING.set(prev);
+ }
+
+ this.ticketLevelUpdates.clear();
+ }
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+
+ if (changedFullStatus != null) {
+ this.addChangedStatuses(changedFullStatus);
+ }
+
+ if (canProcessScheduling && scheduledTasks != null) {
+ for (int i = 0, len = scheduledTasks.size(); i < len; ++i) {
+ scheduledTasks.get(i).schedule();
+ }
+ }
+
+ if (canProcessFullUpdates) {
+ ret |= this.processPendingFullUpdate();
+ }
+
+ return ret;
+ }
+
+ // only call on tick thread
+ protected final boolean processPendingFullUpdate() {
+ final ArrayDeque<NewChunkHolder> pendingFullLoadUpdate = this.pendingFullLoadUpdate;
+
+ boolean ret = false;
+
+ List<NewChunkHolder> changedFullStatus = new ArrayList<>();
+
+ NewChunkHolder holder;
+ while ((holder = pendingFullLoadUpdate.poll()) != null) {
+ ret |= holder.handleFullStatusChange(changedFullStatus);
+
+ if (!changedFullStatus.isEmpty()) {
+ for (int i = 0, len = changedFullStatus.size(); i < len; ++i) {
+ pendingFullLoadUpdate.add(changedFullStatus.get(i));
+ }
+ changedFullStatus.clear();
+ }
+ }
+
+ return ret;
+ }
+
+ public JsonObject getDebugJsonForWatchdog() {
+ // try and detect any potential deadlock that would require us to read unlocked
+ try {
+ if (this.ticketLock.tryLock(10, TimeUnit.SECONDS)) {
+ try {
+ if (this.taskScheduler.schedulingLock.tryLock(10, TimeUnit.SECONDS)) {
+ try {
+ return this.getDebugJsonNoLock();
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+ }
+ } catch (final InterruptedException ignore) {}
+
+ LOGGER.error("Failed to acquire ticket and scheduling lock before timeout for world " + this.world.getWorld().getName());
+
+ // because we read without locks, it may throw exceptions for fastutil maps
+ // so just try until it works...
+ Throwable lastException = null;
+ for (int count = 0;count < 1000;++count) {
+ try {
+ return this.getDebugJsonNoLock();
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr) {
+ lastException = thr;
+ Thread.yield();
+ LockSupport.parkNanos(10_000L);
+ }
+ }
+
+ // failed, return
+ LOGGER.error("Failed to retrieve debug json for watchdog thread without locking", lastException);
+ return null;
+ }
+
+ private JsonObject getDebugJsonNoLock() {
+ final JsonObject ret = new JsonObject();
+ ret.addProperty("current_tick", Long.valueOf(this.currentTick));
+
+ final JsonArray unloadQueue = new JsonArray();
+ ret.add("unload_queue", unloadQueue);
+ for (final NewChunkHolder holder : this.unloadQueue) {
+ final JsonObject coordinate = new JsonObject();
+ unloadQueue.add(coordinate);
+
+ coordinate.addProperty("chunkX", Integer.valueOf(holder.chunkX));
+ coordinate.addProperty("chunkZ", Integer.valueOf(holder.chunkZ));
+ }
+
+ final JsonArray holders = new JsonArray();
+ ret.add("chunkholders", holders);
+
+ for (final NewChunkHolder holder : this.getChunkHolders()) {
+ holders.add(holder.getDebugJson());
+ }
+
+ final JsonArray removeTickToChunkExpireTicketCount = new JsonArray();
+ ret.add("remove_tick_to_chunk_expire_ticket_count", removeTickToChunkExpireTicketCount);
+
+ for (final Long2ObjectMap.Entry<Long2IntOpenHashMap> tickEntry : this.removeTickToChunkExpireTicketCount.long2ObjectEntrySet()) {
+ final long tick = tickEntry.getLongKey();
+ final Long2IntOpenHashMap coordinateToCount = tickEntry.getValue();
+
+ final JsonObject tickJson = new JsonObject();
+ removeTickToChunkExpireTicketCount.add(tickJson);
+
+ tickJson.addProperty("tick", Long.valueOf(tick));
+
+ final JsonArray tickEntries = new JsonArray();
+ tickJson.add("entries", tickEntries);
+
+ for (final Long2IntMap.Entry entry : coordinateToCount.long2IntEntrySet()) {
+ final long coordinate = entry.getLongKey();
+ final int count = entry.getIntValue();
+
+ final JsonObject entryJson = new JsonObject();
+ tickEntries.add(entryJson);
+
+ entryJson.addProperty("chunkX", Long.valueOf(CoordinateUtils.getChunkX(coordinate)));
+ entryJson.addProperty("chunkZ", Long.valueOf(CoordinateUtils.getChunkZ(coordinate)));
+ entryJson.addProperty("count", Integer.valueOf(count));
+ }
+ }
+
+ final JsonArray allTicketsJson = new JsonArray();
+ ret.add("tickets", allTicketsJson);
+
+ for (final Long2ObjectMap.Entry<SortedArraySet<Ticket<?>>> coordinateTickets : this.tickets.long2ObjectEntrySet()) {
+ final long coordinate = coordinateTickets.getLongKey();
+ final SortedArraySet<Ticket<?>> tickets = coordinateTickets.getValue();
+
+ final JsonObject coordinateJson = new JsonObject();
+ allTicketsJson.add(coordinateJson);
+
+ coordinateJson.addProperty("chunkX", Long.valueOf(CoordinateUtils.getChunkX(coordinate)));
+ coordinateJson.addProperty("chunkZ", Long.valueOf(CoordinateUtils.getChunkZ(coordinate)));
+
+ final JsonArray ticketsSerialized = new JsonArray();
+ coordinateJson.add("tickets", ticketsSerialized);
+
+ for (final Ticket<?> ticket : tickets) {
+ final JsonObject ticketSerialized = new JsonObject();
+ ticketsSerialized.add(ticketSerialized);
+
+ ticketSerialized.addProperty("type", ticket.getType().toString());
+ ticketSerialized.addProperty("level", Integer.valueOf(ticket.getTicketLevel()));
+ ticketSerialized.addProperty("identifier", Objects.toString(ticket.key));
+ ticketSerialized.addProperty("remove_tick", Long.valueOf(ticket.removalTick));
+ }
+ }
+
+ return ret;
+ }
+
+ public JsonObject getDebugJson() {
+ final List<ChunkProgressionTask> scheduleList = new ArrayList<>();
+ try {
+ final JsonObject ret;
+ this.ticketLock.lock();
+ try {
+ this.taskScheduler.schedulingLock.lock();
+ try {
+ this.processTicketUpdates(false, false, scheduleList);
+ ret = this.getDebugJsonNoLock();
+ } finally {
+ this.taskScheduler.schedulingLock.unlock();
+ }
+ } finally {
+ this.ticketLock.unlock();
+ }
+ return ret;
+ } finally {
+ // schedule tasks, we can't let processTicketUpdates do this because we call it holding the schedule lock
+ for (int i = 0, len = scheduleList.size(); i < len; ++i) {
+ scheduleList.get(i).schedule();
+ }
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..53ddd7e9ac05e6a9eb809f329796e6d4f6bb2ab1
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java
@@ -0,0 +1,181 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.starlight.common.light.StarLightEngine;
+import ca.spottedleaf.starlight.common.light.StarLightInterface;
+import io.papermc.paper.chunk.system.light.LightQueue;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.ProtoChunk;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import java.util.function.BooleanSupplier;
+
+public final class ChunkLightTask extends ChunkProgressionTask {
+
+ private static final Logger LOGGER = LogManager.getLogger();
+
+ protected final ChunkAccess fromChunk;
+
+ private final LightTaskPriorityHolder priorityHolder;
+
+ public ChunkLightTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ,
+ final ChunkAccess chunk, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ);
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.priorityHolder = new LightTaskPriorityHolder(priority, this);
+ this.fromChunk = chunk;
+ }
+
+ @Override
+ public boolean isScheduled() {
+ return this.priorityHolder.isScheduled();
+ }
+
+ @Override
+ public ChunkStatus getTargetStatus() {
+ return ChunkStatus.LIGHT;
+ }
+
+ @Override
+ public void schedule() {
+ this.priorityHolder.schedule();
+ }
+
+ @Override
+ public void cancel() {
+ this.priorityHolder.cancel();
+ }
+
+ @Override
+ public PrioritisedExecutor.Priority getPriority() {
+ return this.priorityHolder.getPriority();
+ }
+
+ @Override
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ this.priorityHolder.raisePriority(priority);
+ }
+
+ @Override
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ this.priorityHolder.setPriority(priority);
+ }
+
+ @Override
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ this.priorityHolder.raisePriority(priority);
+ }
+
+ private static final class LightTaskPriorityHolder extends PriorityHolder {
+
+ protected final ChunkLightTask task;
+
+ protected LightTaskPriorityHolder(final PrioritisedExecutor.Priority priority, final ChunkLightTask task) {
+ super(priority);
+ this.task = task;
+ }
+
+ @Override
+ protected void cancelScheduled() {
+ final ChunkLightTask task = this.task;
+ task.complete(null, null);
+ }
+
+ @Override
+ protected PrioritisedExecutor.Priority getScheduledPriority() {
+ final ChunkLightTask task = this.task;
+ return task.world.getChunkSource().getLightEngine().theLightEngine.lightQueue.getPriority(task.chunkX, task.chunkZ);
+ }
+
+ @Override
+ protected void scheduleTask(final PrioritisedExecutor.Priority priority) {
+ final ChunkLightTask task = this.task;
+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine;
+ final LightQueue lightQueue = starLightInterface.lightQueue;
+ lightQueue.queueChunkLightTask(new ChunkPos(task.chunkX, task.chunkZ), new LightTask(starLightInterface, task), priority);
+ lightQueue.setPriority(task.chunkX, task.chunkZ, priority);
+ }
+
+ @Override
+ protected void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority) {
+ final ChunkLightTask task = this.task;
+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine;
+ final LightQueue lightQueue = starLightInterface.lightQueue;
+ lightQueue.lowerPriority(task.chunkX, task.chunkZ, priority);
+ }
+
+ @Override
+ protected void setPriorityScheduled(final PrioritisedExecutor.Priority priority) {
+ final ChunkLightTask task = this.task;
+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine;
+ final LightQueue lightQueue = starLightInterface.lightQueue;
+ lightQueue.setPriority(task.chunkX, task.chunkZ, priority);
+ }
+
+ @Override
+ protected void raisePriorityScheduled(final PrioritisedExecutor.Priority priority) {
+ final ChunkLightTask task = this.task;
+ final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine;
+ final LightQueue lightQueue = starLightInterface.lightQueue;
+ lightQueue.raisePriority(task.chunkX, task.chunkZ, priority);
+ }
+ }
+
+ private static final class LightTask implements BooleanSupplier {
+
+ protected final StarLightInterface lightEngine;
+ protected final ChunkLightTask task;
+
+ public LightTask(final StarLightInterface lightEngine, final ChunkLightTask task) {
+ this.lightEngine = lightEngine;
+ this.task = task;
+ }
+
+ @Override
+ public boolean getAsBoolean() {
+ final ChunkLightTask task = this.task;
+ // executed on light thread
+ if (!task.priorityHolder.markExecuting()) {
+ // cancelled
+ return false;
+ }
+
+ try {
+ final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(task.fromChunk);
+
+ if (task.fromChunk.isLightCorrect() && task.fromChunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) {
+ this.lightEngine.forceLoadInChunk(task.fromChunk, emptySections);
+ this.lightEngine.checkChunkEdges(task.chunkX, task.chunkZ);
+ } else {
+ task.fromChunk.setLightCorrect(false);
+ this.lightEngine.lightChunk(task.fromChunk, emptySections);
+ task.fromChunk.setLightCorrect(true);
+ }
+ // we need to advance status
+ if (task.fromChunk instanceof ProtoChunk chunk && chunk.getStatus() == ChunkStatus.LIGHT.getParent()) {
+ chunk.setStatus(ChunkStatus.LIGHT);
+ }
+ } catch (final Throwable thr) {
+ if (!(thr instanceof ThreadDeath)) {
+ LOGGER.fatal("Failed to light chunk " + task.fromChunk.getPos().toString() + " in world '" + this.lightEngine.getWorld().getWorld().getName() + "'", thr);
+ }
+
+ task.complete(null, thr);
+
+ if (thr instanceof ThreadDeath) {
+ throw (ThreadDeath)thr;
+ }
+
+ return true;
+ }
+
+ task.complete(task.fromChunk, null);
+ return true;
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..2410210739420ca7b384633dd7560759f04743c7
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java
@@ -0,0 +1,499 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import ca.spottedleaf.dataconverter.minecraft.MCDataConverter;
+import ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.chunk.system.io.RegionFileIOThread;
+import io.papermc.paper.chunk.system.poi.PoiChunk;
+import net.minecraft.SharedConstants;
+import net.minecraft.core.Registry;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.ProtoChunk;
+import net.minecraft.world.level.chunk.UpgradeData;
+import net.minecraft.world.level.chunk.storage.ChunkSerializer;
+import net.minecraft.world.level.chunk.storage.EntityStorage;
+import net.minecraft.world.level.levelgen.blending.BlendingData;
+import org.slf4j.Logger;
+import java.lang.invoke.VarHandle;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Consumer;
+
+public final class ChunkLoadTask extends ChunkProgressionTask {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ private final NewChunkHolder chunkHolder;
+ private final ChunkDataLoadTask loadTask;
+
+ private boolean cancelled;
+ private NewChunkHolder.GenericDataLoadTaskCallback entityLoadTask;
+ private NewChunkHolder.GenericDataLoadTaskCallback poiLoadTask;
+
+ protected ChunkLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ,
+ final NewChunkHolder chunkHolder, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ);
+ this.chunkHolder = chunkHolder;
+ this.loadTask = new ChunkDataLoadTask(scheduler, world, chunkX, chunkZ, priority);
+ this.loadTask.addCallback((final GenericDataLoadTask.TaskResult<ChunkAccess, Throwable> result) -> {
+ ChunkLoadTask.this.complete(result == null ? null : result.left(), result == null ? null : result.right());
+ });
+ }
+
+ @Override
+ public ChunkStatus getTargetStatus() {
+ return ChunkStatus.EMPTY;
+ }
+
+ private boolean scheduled;
+
+ @Override
+ public boolean isScheduled() {
+ return this.scheduled;
+ }
+
+ @Override
+ public void schedule() {
+ final NewChunkHolder.GenericDataLoadTaskCallback entityLoadTask;
+ final NewChunkHolder.GenericDataLoadTaskCallback poiLoadTask;
+
+ final AtomicInteger count = new AtomicInteger();
+ final Consumer<GenericDataLoadTask.TaskResult<?, ?>> scheduleLoadTask = (final GenericDataLoadTask.TaskResult<?, ?> result) -> {
+ if (count.decrementAndGet() == 0) {
+ ChunkLoadTask.this.loadTask.schedule(false);
+ }
+ };
+
+ // NOTE: it is IMPOSSIBLE for getOrLoadEntityData/getOrLoadPoiData to complete synchronously, because
+ // they must schedule a task to off main or to on main to complete
+ this.scheduler.schedulingLock.lock();
+ try {
+ if (this.scheduled) {
+ throw new IllegalStateException("schedule() called twice");
+ }
+ this.scheduled = true;
+ if (this.cancelled) {
+ return;
+ }
+ if (!this.chunkHolder.isEntityChunkNBTLoaded()) {
+ entityLoadTask = this.chunkHolder.getOrLoadEntityData((Consumer)scheduleLoadTask);
+ count.setPlain(count.getPlain() + 1);
+ } else {
+ entityLoadTask = null;
+ }
+
+ if (!this.chunkHolder.isPoiChunkLoaded()) {
+ poiLoadTask = this.chunkHolder.getOrLoadPoiData((Consumer)scheduleLoadTask);
+ count.setPlain(count.getPlain() + 1);
+ } else {
+ poiLoadTask = null;
+ }
+
+ this.entityLoadTask = entityLoadTask;
+ this.poiLoadTask = poiLoadTask;
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+
+ if (entityLoadTask != null) {
+ entityLoadTask.schedule();
+ }
+
+ if (poiLoadTask != null) {
+ poiLoadTask.schedule();
+ }
+
+ if (entityLoadTask == null && poiLoadTask == null) {
+ // no need to wait on those, we can schedule now
+ this.loadTask.schedule(false);
+ }
+ }
+
+ @Override
+ public void cancel() {
+ // must be before load task access, so we can synchronise with the writes to the fields
+ this.scheduler.schedulingLock.lock();
+ try {
+ this.cancelled = true;
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+
+ /*
+ Note: The entityLoadTask/poiLoadTask do not complete when cancelled,
+ but this is fine because if they are successfully cancelled then
+ we will successfully cancel the load task, which will complete when cancelled
+ */
+
+ if (this.entityLoadTask != null) {
+ this.entityLoadTask.cancel();
+ }
+ if (this.poiLoadTask != null) {
+ this.poiLoadTask.cancel();
+ }
+ this.loadTask.cancel();
+ }
+
+ @Override
+ public PrioritisedExecutor.Priority getPriority() {
+ return this.loadTask.getPriority();
+ }
+
+ @Override
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask();
+ if (entityLoad != null) {
+ entityLoad.lowerPriority(priority);
+ }
+
+ final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask();
+
+ if (poiLoad != null) {
+ poiLoad.lowerPriority(priority);
+ }
+
+ this.loadTask.lowerPriority(priority);
+ }
+
+ @Override
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask();
+ if (entityLoad != null) {
+ entityLoad.setPriority(priority);
+ }
+
+ final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask();
+
+ if (poiLoad != null) {
+ poiLoad.setPriority(priority);
+ }
+
+ this.loadTask.setPriority(priority);
+ }
+
+ @Override
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask();
+ if (entityLoad != null) {
+ entityLoad.raisePriority(priority);
+ }
+
+ final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask();
+
+ if (poiLoad != null) {
+ poiLoad.raisePriority(priority);
+ }
+
+ this.loadTask.raisePriority(priority);
+ }
+
+ protected static abstract class CallbackDataLoadTask<OnMain,FinalCompletion> extends GenericDataLoadTask<OnMain,FinalCompletion> {
+
+ private TaskResult<FinalCompletion, Throwable> result;
+ private final MultiThreadedQueue<Consumer<TaskResult<FinalCompletion, Throwable>>> waiters = new MultiThreadedQueue<>();
+
+ protected volatile boolean completed;
+ protected static final VarHandle COMPLETED_HANDLE = ConcurrentUtil.getVarHandle(CallbackDataLoadTask.class, "completed", boolean.class);
+
+ protected CallbackDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX,
+ final int chunkZ, final RegionFileIOThread.RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ, type, priority);
+ }
+
+ public void addCallback(final Consumer<TaskResult<FinalCompletion, Throwable>> consumer) {
+ if (!this.waiters.add(consumer)) {
+ try {
+ consumer.accept(this.result);
+ } catch (final Throwable throwable) {
+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Consumer", ChunkTaskScheduler.stringIfNull(consumer),
+ "Completed throwable", ChunkTaskScheduler.stringIfNull(this.result.right())
+ ), throwable);
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ }
+ }
+ }
+
+ @Override
+ protected void onComplete(final TaskResult<FinalCompletion, Throwable> result) {
+ if ((boolean)COMPLETED_HANDLE.getAndSet((CallbackDataLoadTask)this, (boolean)true)) {
+ throw new IllegalStateException("Already completed");
+ }
+ this.result = result;
+ Consumer<TaskResult<FinalCompletion, Throwable>> consumer;
+ while ((consumer = this.waiters.pollOrBlockAdds()) != null) {
+ try {
+ consumer.accept(result);
+ } catch (final Throwable throwable) {
+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Consumer", ChunkTaskScheduler.stringIfNull(consumer),
+ "Completed throwable", ChunkTaskScheduler.stringIfNull(result.right())
+ ), throwable);
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ return;
+ }
+ }
+ }
+ }
+
+ public final class ChunkDataLoadTask extends CallbackDataLoadTask<ChunkSerializer.InProgressChunkHolder, ChunkAccess> {
+ protected ChunkDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX,
+ final int chunkZ, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.CHUNK_DATA, priority);
+ }
+
+ @Override
+ protected boolean hasOffMain() {
+ return true;
+ }
+
+ @Override
+ protected boolean hasOnMain() {
+ return true;
+ }
+
+ @Override
+ protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return this.scheduler.loadExecutor.createTask(run, priority);
+ }
+
+ @Override
+ protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return this.scheduler.createChunkTask(this.chunkX, this.chunkZ, run, priority);
+ }
+
+ @Override
+ protected TaskResult<ChunkAccess, Throwable> completeOnMainOffMain(final ChunkSerializer.InProgressChunkHolder data, final Throwable throwable) {
+ if (data != null) {
+ return null;
+ }
+
+ final PoiChunk poiChunk = ChunkLoadTask.this.chunkHolder.getPoiChunk();
+ if (poiChunk == null) {
+ LOGGER.error("Expected poi chunk to be loaded with chunk for task " + this.toString());
+ } else if (!poiChunk.isLoaded()) {
+ // need to call poiChunk.load() on main
+ return null;
+ }
+
+ return new TaskResult<>(this.getEmptyChunk(), null);
+ }
+
+ @Override
+ protected TaskResult<ChunkSerializer.InProgressChunkHolder, Throwable> runOffMain(final CompoundTag data, final Throwable throwable) {
+ if (throwable != null) {
+ LOGGER.error("Failed to load chunk data for task: " + this.toString() + ", chunk data will be lost", throwable);
+ return new TaskResult<>(null, null);
+ }
+
+ if (data == null) {
+ return new TaskResult<>(null, null);
+ }
+
+ // need to convert data, and then deserialize it
+
+ try {
+ final ChunkPos chunkPos = new ChunkPos(this.chunkX, this.chunkZ);
+ final ChunkMap chunkMap = this.world.getChunkSource().chunkMap;
+ // run converters
+ // note: upgradeChunkTag copies the data already
+ final CompoundTag converted = chunkMap.upgradeChunkTag(
+ this.world.getTypeKey(), chunkMap.overworldDataStorage, data, chunkMap.generator.getTypeNameForDataFixer(),
+ chunkPos, this.world
+ );
+ // deserialize
+ final ChunkSerializer.InProgressChunkHolder chunkHolder = ChunkSerializer.loadChunk(
+ this.world, chunkMap.getPoiManager(), chunkPos, converted, true
+ );
+
+ return new TaskResult<>(chunkHolder, null);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr2) {
+ LOGGER.error("Failed to parse chunk data for task: " + this.toString() + ", chunk data will be lost", thr2);
+ return new TaskResult<>(null, thr2);
+ }
+ }
+
+ private ProtoChunk getEmptyChunk() {
+ return new ProtoChunk(
+ new ChunkPos(this.chunkX, this.chunkZ), UpgradeData.EMPTY, this.world,
+ this.world.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), (BlendingData)null
+ );
+ }
+
+ @Override
+ protected TaskResult<ChunkAccess, Throwable> runOnMain(final ChunkSerializer.InProgressChunkHolder data, final Throwable throwable) {
+ final PoiChunk poiChunk = ChunkLoadTask.this.chunkHolder.getPoiChunk();
+ if (poiChunk == null) {
+ LOGGER.error("Expected poi chunk to be loaded with chunk for task " + this.toString());
+ } else {
+ poiChunk.load();
+ }
+
+ if (data == null || data.protoChunk == null) {
+ // throwable could be non-null, but the off-main task will print its exceptions - so we don't need to care,
+ // it's handled already
+
+ return new TaskResult<>(this.getEmptyChunk(), null);
+ }
+
+ // have tasks to run (at this point, it's just the POI consistency checking)
+ try {
+ if (data.tasks != null) {
+ for (int i = 0, len = data.tasks.size(); i < len; ++i) {
+ data.tasks.poll().run();
+ }
+ }
+
+ return new TaskResult<>(data.protoChunk, null);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr2) {
+ LOGGER.error("Failed to parse main tasks for task " + this.toString() + ", chunk data will be lost", thr2);
+ return new TaskResult<>(this.getEmptyChunk(), null);
+ }
+ }
+ }
+
+ public static final class PoiDataLoadTask extends CallbackDataLoadTask<PoiChunk, PoiChunk> {
+ public PoiDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX,
+ final int chunkZ, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.POI_DATA, priority);
+ }
+
+ @Override
+ protected boolean hasOffMain() {
+ return true;
+ }
+
+ @Override
+ protected boolean hasOnMain() {
+ return false;
+ }
+
+ @Override
+ protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return this.scheduler.loadExecutor.createTask(run, priority);
+ }
+
+ @Override
+ protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ protected TaskResult<PoiChunk, Throwable> completeOnMainOffMain(final PoiChunk data, final Throwable throwable) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ protected TaskResult<PoiChunk, Throwable> runOffMain(CompoundTag data, final Throwable throwable) {
+ if (throwable != null) {
+ LOGGER.error("Failed to load poi data for task: " + this.toString() + ", poi data will be lost", throwable);
+ return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null);
+ }
+
+ if (data == null || data.isEmpty()) {
+ // nothing to do
+ return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null);
+ }
+
+ try {
+ data = data.copy(); // coming from the I/O thread, so we need to copy
+ // run converters
+ final int dataVersion = !data.contains(SharedConstants.DATA_VERSION_TAG, 99) ? 1945 : data.getInt(SharedConstants.DATA_VERSION_TAG);
+ final CompoundTag converted = MCDataConverter.convertTag(
+ MCTypeRegistry.POI_CHUNK, data, dataVersion, SharedConstants.getCurrentVersion().getWorldVersion()
+ );
+
+ // now we need to parse it
+ return new TaskResult<>(PoiChunk.parse(this.world, this.chunkX, this.chunkZ, converted), null);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr2) {
+ LOGGER.error("Failed to run parse poi data for task: " + this.toString() + ", poi data will be lost", thr2);
+ return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null);
+ }
+ }
+
+ @Override
+ protected TaskResult<PoiChunk, Throwable> runOnMain(final PoiChunk data, final Throwable throwable) {
+ throw new UnsupportedOperationException();
+ }
+ }
+
+ public static final class EntityDataLoadTask extends CallbackDataLoadTask<CompoundTag, CompoundTag> {
+
+ public EntityDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX,
+ final int chunkZ, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.ENTITY_DATA, priority);
+ }
+
+ @Override
+ protected boolean hasOffMain() {
+ return true;
+ }
+
+ @Override
+ protected boolean hasOnMain() {
+ return false;
+ }
+
+ @Override
+ protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return this.scheduler.loadExecutor.createTask(run, priority);
+ }
+
+ @Override
+ protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ protected TaskResult<CompoundTag, Throwable> completeOnMainOffMain(final CompoundTag data, final Throwable throwable) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ protected TaskResult<CompoundTag, Throwable> runOffMain(final CompoundTag data, final Throwable throwable) {
+ if (throwable != null) {
+ LOGGER.error("Failed to load entity data for task: " + this.toString() + ", entity data will be lost", throwable);
+ return new TaskResult<>(null, null);
+ }
+
+ if (data == null || data.isEmpty()) {
+ // nothing to do
+ return new TaskResult<>(null, null);
+ }
+
+ try {
+ // note: data comes from the I/O thread, so we need to copy it
+ return new TaskResult<>(EntityStorage.upgradeChunkTag(data.copy()), null);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr2) {
+ LOGGER.error("Failed to run converters for entity data for task: " + this.toString() + ", entity data will be lost", thr2);
+ return new TaskResult<>(null, thr2);
+ }
+ }
+
+ @Override
+ protected TaskResult<CompoundTag, Throwable> runOnMain(final CompoundTag data, final Throwable throwable) {
+ throw new UnsupportedOperationException();
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..322675a470eacbf0e5452f4009c643f2d0b4ce24
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java
@@ -0,0 +1,105 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import java.lang.invoke.VarHandle;
+import java.util.Map;
+import java.util.function.BiConsumer;
+
+public abstract class ChunkProgressionTask {
+
+ private final MultiThreadedQueue<BiConsumer<ChunkAccess, Throwable>> waiters = new MultiThreadedQueue<>();
+ private ChunkAccess completedChunk;
+ private Throwable completedThrowable;
+
+ protected final ChunkTaskScheduler scheduler;
+ protected final ServerLevel world;
+ protected final int chunkX;
+ protected final int chunkZ;
+
+ protected volatile boolean completed;
+ protected static final VarHandle COMPLETED_HANDLE = ConcurrentUtil.getVarHandle(ChunkProgressionTask.class, "completed", boolean.class);
+
+ protected ChunkProgressionTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ) {
+ this.scheduler = scheduler;
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ }
+
+ // Used only for debug json
+ public abstract boolean isScheduled();
+
+ // Note: It is the responsibility of the task to set the chunk's status once it has completed
+ public abstract ChunkStatus getTargetStatus();
+
+ /* Only executed once */
+ /* Implementations must be prepared to handle cases where cancel() is called before schedule() */
+ public abstract void schedule();
+
+ /* May be called multiple times */
+ public abstract void cancel();
+
+ public abstract PrioritisedExecutor.Priority getPriority();
+
+ /* Schedule lock is always held for the priority update calls */
+
+ public abstract void lowerPriority(final PrioritisedExecutor.Priority priority);
+
+ public abstract void setPriority(final PrioritisedExecutor.Priority priority);
+
+ public abstract void raisePriority(final PrioritisedExecutor.Priority priority);
+
+ public final void onComplete(final BiConsumer<ChunkAccess, Throwable> onComplete) {
+ if (!this.waiters.add(onComplete)) {
+ try {
+ onComplete.accept(this.completedChunk, this.completedThrowable);
+ } catch (final Throwable throwable) {
+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Consumer", ChunkTaskScheduler.stringIfNull(onComplete),
+ "Completed throwable", ChunkTaskScheduler.stringIfNull(this.completedThrowable)
+ ), throwable);
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ }
+ }
+ }
+
+ protected final void complete(final ChunkAccess chunk, final Throwable throwable) {
+ try {
+ this.complete0(chunk, throwable);
+ } catch (final Throwable thr2) {
+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Completed throwable", ChunkTaskScheduler.stringIfNull(throwable)
+ ), thr2);
+ if (thr2 instanceof ThreadDeath) {
+ throw (ThreadDeath)thr2;
+ }
+ }
+ }
+
+ private void complete0(final ChunkAccess chunk, final Throwable throwable) {
+ if ((boolean)COMPLETED_HANDLE.getAndSet((ChunkProgressionTask)this, (boolean)true)) {
+ throw new IllegalStateException("Already completed");
+ }
+ this.completedChunk = chunk;
+ this.completedThrowable = throwable;
+
+ BiConsumer<ChunkAccess, Throwable> consumer;
+ while ((consumer = this.waiters.pollOrBlockAdds()) != null) {
+ consumer.accept(chunk, throwable);
+ }
+ }
+
+ @Override
+ public String toString() {
+ return "ChunkProgressionTask{class: " + this.getClass().getName() + ", for world: " + this.world.getWorld().getName() +
+ ", chunk: (" + this.chunkX + "," + this.chunkZ + "), hashcode: " + System.identityHashCode(this) + ", priority: " + this.getPriority() +
+ ", status: " + this.getTargetStatus().toString() + ", scheduled: " + this.isScheduled() + "}";
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java
new file mode 100644
index 0000000000000000000000000000000000000000..c43c62fb22a26e4e3f5df4001f1b3e65d3833833
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java
@@ -0,0 +1,780 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadedTaskQueue;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.configuration.GlobalConfiguration;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import net.minecraft.CrashReport;
+import net.minecraft.CrashReportCategory;
+import net.minecraft.ReportedException;
+import net.minecraft.server.MCUtil;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.TicketType;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.LevelChunk;
+import org.bukkit.Bukkit;
+import org.slf4j.Logger;
+import java.io.File;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.function.BooleanSupplier;
+import java.util.function.Consumer;
+
+public final class ChunkTaskScheduler {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ static int newChunkSystemIOThreads;
+ static int newChunkSystemWorkerThreads;
+ static int newChunkSystemGenParallelism;
+ static int newChunkSystemLoadParallelism;
+
+ public static ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool workerThreads;
+
+ private static boolean initialised = false;
+
+ public static void init(final GlobalConfiguration.ChunkSystem config) {
+ if (initialised) {
+ return;
+ }
+ initialised = true;
+ newChunkSystemIOThreads = config.ioThreads;
+ newChunkSystemWorkerThreads = config.workerThreads;
+ if (newChunkSystemIOThreads < 0) {
+ newChunkSystemIOThreads = 1;
+ } else {
+ newChunkSystemIOThreads = Math.max(1, newChunkSystemIOThreads);
+ }
+ int defaultWorkerThreads = Runtime.getRuntime().availableProcessors() / 2;
+ if (defaultWorkerThreads <= 4) {
+ defaultWorkerThreads = defaultWorkerThreads <= 3 ? 1 : 2;
+ } else {
+ defaultWorkerThreads = defaultWorkerThreads / 2;
+ }
+ defaultWorkerThreads = Integer.getInteger("Paper.WorkerThreadCount", Integer.valueOf(defaultWorkerThreads));
+
+ if (newChunkSystemWorkerThreads < 0) {
+ newChunkSystemWorkerThreads = defaultWorkerThreads;
+ } else {
+ newChunkSystemWorkerThreads = Math.max(1, newChunkSystemWorkerThreads);
+ }
+
+ String newChunkSystemGenParallelism = config.genParallelism;
+ if (newChunkSystemGenParallelism.equalsIgnoreCase("default")) {
+ newChunkSystemGenParallelism = "true";
+ }
+ boolean useParallelGen;
+ if (newChunkSystemGenParallelism.equalsIgnoreCase("on") || newChunkSystemGenParallelism.equalsIgnoreCase("enabled")
+ || newChunkSystemGenParallelism.equalsIgnoreCase("true")) {
+ useParallelGen = true;
+ } else if (newChunkSystemGenParallelism.equalsIgnoreCase("off") || newChunkSystemGenParallelism.equalsIgnoreCase("disabled")
+ || newChunkSystemGenParallelism.equalsIgnoreCase("false")) {
+ useParallelGen = false;
+ } else {
+ throw new IllegalStateException("Invalid option for gen-parallelism: must be one of [on, off, enabled, disabled, true, false, default]");
+ }
+
+ ChunkTaskScheduler.newChunkSystemGenParallelism = useParallelGen ? newChunkSystemWorkerThreads : 1;
+ ChunkTaskScheduler.newChunkSystemLoadParallelism = newChunkSystemWorkerThreads;
+
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.init(newChunkSystemIOThreads);
+ workerThreads = new ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool(
+ "Paper Chunk System Worker Pool", newChunkSystemWorkerThreads,
+ (final Thread thread, final Integer id) -> {
+ thread.setPriority(Thread.NORM_PRIORITY - 2);
+ thread.setName("Tuinity Chunk System Worker #" + id.intValue());
+ thread.setUncaughtExceptionHandler(io.papermc.paper.chunk.system.scheduling.NewChunkHolder.CHUNKSYSTEM_UNCAUGHT_EXCEPTION_HANDLER);
+ }, (long)(20.0e6)); // 20ms
+
+ LOGGER.info("Chunk system is using " + newChunkSystemIOThreads + " I/O threads, " + newChunkSystemWorkerThreads + " worker threads, and gen parallelism of " + ChunkTaskScheduler.newChunkSystemGenParallelism + " threads");
+ }
+
+ public final ServerLevel world;
+ public final PrioritisedThreadPool workers;
+ public final PrioritisedThreadPool.PrioritisedPoolExecutor lightExecutor;
+ public final PrioritisedThreadPool.PrioritisedPoolExecutor genExecutor;
+ public final PrioritisedThreadPool.PrioritisedPoolExecutor parallelGenExecutor;
+ public final PrioritisedThreadPool.PrioritisedPoolExecutor loadExecutor;
+
+ private final PrioritisedThreadedTaskQueue mainThreadExecutor = new PrioritisedThreadedTaskQueue();
+
+ final ReentrantLock schedulingLock = new ReentrantLock();
+ public final ChunkHolderManager chunkHolderManager;
+
+ static {
+ ChunkStatus.EMPTY.writeRadius = 0;
+ ChunkStatus.STRUCTURE_STARTS.writeRadius = 0;
+ ChunkStatus.STRUCTURE_REFERENCES.writeRadius = 0;
+ ChunkStatus.BIOMES.writeRadius = 0;
+ ChunkStatus.NOISE.writeRadius = 0;
+ ChunkStatus.SURFACE.writeRadius = 0;
+ ChunkStatus.CARVERS.writeRadius = 0;
+ ChunkStatus.LIQUID_CARVERS.writeRadius = 0;
+ ChunkStatus.FEATURES.writeRadius = 1;
+ ChunkStatus.LIGHT.writeRadius = 1;
+ ChunkStatus.SPAWN.writeRadius = 0;
+ ChunkStatus.HEIGHTMAPS.writeRadius = 0;
+ ChunkStatus.FULL.writeRadius = 0;
+
+ /*
+ It's important that the neighbour read radius is taken into account. If _any_ later status is using some chunk as
+ a neighbour, it must be also safe if that neighbour is being generated. i.e for any status later than FEATURES,
+ for a status to be parallel safe it must not read the block data from its neighbours.
+ */
+ final List<ChunkStatus> parallelCapableStatus = Arrays.asList(
+ // No-op executor.
+ ChunkStatus.EMPTY,
+
+ // This is parallel capable, as CB has fixed the concurrency issue with stronghold generations.
+ // Does not touch neighbour chunks.
+ // TODO On another note, what the fuck is StructureFeatureManager.StructureCheck and why is it used? it's leaking
+ ChunkStatus.STRUCTURE_STARTS,
+
+ // Surprisingly this is parallel capable. It is simply reading the already-created structure starts
+ // into the structure references for the chunk. So while it reads from it neighbours, its neighbours
+ // will not change, even if executed in parallel.
+ ChunkStatus.STRUCTURE_REFERENCES,
+
+ // Safe. Mojang runs it in parallel as well.
+ ChunkStatus.BIOMES,
+
+ // Safe. Mojang runs it in parallel as well.
+ ChunkStatus.NOISE,
+
+ // Parallel safe. Only touches the target chunk. Biome retrieval is now noise based, which is
+ // completely thread-safe.
+ ChunkStatus.SURFACE,
+
+ // No global state is modified in the carvers. It only touches the specified chunk. So it is parallel safe.
+ ChunkStatus.CARVERS,
+
+ // No-op executor. Was replaced in 1.18 with carvers, I think.
+ ChunkStatus.LIQUID_CARVERS,
+
+ // FEATURES is not parallel safe. It writes to neighbours.
+
+ // LIGHT is not parallel safe. It also doesn't run on the generation executor, so no point.
+
+ // Only writes to the specified chunk. State is not read by later statuses. Parallel safe.
+ // Note: it may look unsafe because it writes to a worldgenregion, but the region size is always 0 -
+ // see the task margin.
+ // However, if the neighbouring FEATURES chunk is unloaded, but then fails to load in again (for whatever
+ // reason), then it would write to this chunk - and since this status reads blocks from itself, it's not
+ // safe to execute this in parallel.
+ // SPAWN
+
+ // No-op executor.
+ ChunkStatus.HEIGHTMAPS
+
+ // FULL is executed on main.
+ );
+
+ for (final ChunkStatus status : parallelCapableStatus) {
+ status.isParallelCapable = true;
+ }
+ }
+
+ public ChunkTaskScheduler(final ServerLevel world, final PrioritisedThreadPool workers) {
+ this.world = world;
+ this.workers = workers;
+
+ final String worldName = world.getWorld().getName();
+ this.genExecutor = workers.createExecutor("Chunk single-threaded generation executor for world '" + worldName + "'", 1);
+ // same as genExecutor, as there are race conditions between updating blocks in FEATURE status while lighting chunks
+ this.lightExecutor = this.genExecutor;
+ this.parallelGenExecutor = newChunkSystemGenParallelism <= 1 ? this.genExecutor
+ : workers.createExecutor("Chunk parallel generation executor for world '" + worldName + "'", newChunkSystemGenParallelism);
+ this.loadExecutor = workers.createExecutor("Chunk load executor for world '" + worldName + "'", newChunkSystemLoadParallelism);
+ this.chunkHolderManager = new ChunkHolderManager(world, this);
+ }
+
+ private final AtomicBoolean failedChunkSystem = new AtomicBoolean();
+
+ public static Object stringIfNull(final Object obj) {
+ return obj == null ? "null" : obj;
+ }
+
+ public void unrecoverableChunkSystemFailure(final int chunkX, final int chunkZ, final Map<String, Object> objectsOfInterest, final Throwable thr) {
+ final NewChunkHolder holder = this.chunkHolderManager.getChunkHolder(chunkX, chunkZ);
+ LOGGER.error("Chunk system error at chunk (" + chunkX + "," + chunkZ + "), holder: " + holder + ", exception:", new Throwable(thr));
+
+ if (this.failedChunkSystem.getAndSet(true)) {
+ return;
+ }
+
+ final ReportedException reportedException = thr instanceof ReportedException ? (ReportedException)thr : new ReportedException(new CrashReport("Chunk system error", thr));
+
+ CrashReportCategory crashReportCategory = reportedException.getReport().addCategory("Chunk system details");
+ crashReportCategory.setDetail("Chunk coordinate", new ChunkPos(chunkX, chunkZ).toString());
+ crashReportCategory.setDetail("ChunkHolder", Objects.toString(holder));
+ crashReportCategory.setDetail("unrecoverableChunkSystemFailure caller thread", Thread.currentThread().getName());
+
+ crashReportCategory = reportedException.getReport().addCategory("Chunk System Objects of Interest");
+ for (final Map.Entry<String, Object> entry : objectsOfInterest.entrySet()) {
+ if (entry.getValue() instanceof Throwable thrObject) {
+ crashReportCategory.setDetailError(Objects.toString(entry.getKey()), thrObject);
+ } else {
+ crashReportCategory.setDetail(Objects.toString(entry.getKey()), Objects.toString(entry.getValue()));
+ }
+ }
+
+ final Runnable crash = () -> {
+ throw new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException);
+ };
+
+ // this may not be good enough, specifically thanks to stupid ass plugins swallowing exceptions
+ this.scheduleChunkTask(chunkX, chunkZ, crash, PrioritisedExecutor.Priority.BLOCKING);
+ // so, make the main thread pick it up
+ MinecraftServer.chunkSystemCrash = new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException);
+ }
+
+ public boolean executeMainThreadTask() {
+ TickThread.ensureTickThread("Cannot execute main thread task off-main");
+ return this.mainThreadExecutor.executeTask();
+ }
+
+ public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
+ this.chunkHolderManager.raisePriority(x, z, priority);
+ }
+
+ public void setPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
+ this.chunkHolderManager.setPriority(x, z, priority);
+ }
+
+ public void lowerPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
+ this.chunkHolderManager.lowerPriority(x, z, priority);
+ }
+
+ private final AtomicLong chunkLoadCounter = new AtomicLong();
+
+ public void scheduleTickingState(final int chunkX, final int chunkZ, final ChunkHolder.FullChunkStatus toStatus,
+ final boolean addTicket, final PrioritisedExecutor.Priority priority,
+ final Consumer<LevelChunk> onComplete) {
+ if (!TickThread.isTickThread()) {
+ this.scheduleChunkTask(chunkX, chunkZ, () -> {
+ ChunkTaskScheduler.this.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
+ }, priority);
+ return;
+ }
+ if (this.chunkHolderManager.ticketLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot schedule chunk load during ticket level update");
+ }
+ if (this.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot schedule chunk loading recursively");
+ }
+
+ if (toStatus == ChunkHolder.FullChunkStatus.INACCESSIBLE) {
+ throw new IllegalArgumentException("Cannot wait for INACCESSIBLE status");
+ }
+
+ final int minLevel = 33 - (toStatus.ordinal() - 1);
+ final Long chunkReference = addTicket ? Long.valueOf(this.chunkLoadCounter.getAndIncrement()) : null;
+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+
+ if (addTicket) {
+ this.chunkHolderManager.addTicketAtLevel(TicketType.CHUNK_LOAD, chunkKey, minLevel, chunkReference);
+ this.chunkHolderManager.processTicketUpdates();
+ }
+
+ final Consumer<LevelChunk> loadCallback = (final LevelChunk chunk) -> {
+ try {
+ if (onComplete != null) {
+ onComplete.accept(chunk);
+ }
+ } finally {
+ if (addTicket) {
+ ChunkTaskScheduler.this.chunkHolderManager.addAndRemoveTickets(chunkKey,
+ TicketType.UNKNOWN, minLevel, new ChunkPos(chunkKey),
+ TicketType.CHUNK_LOAD, minLevel, chunkReference
+ );
+ }
+ }
+ };
+
+ final boolean scheduled;
+ final LevelChunk chunk;
+ this.chunkHolderManager.ticketLock.lock();
+ try {
+ this.schedulingLock.lock();
+ try {
+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey);
+ if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) {
+ scheduled = false;
+ chunk = null;
+ } else {
+ final ChunkHolder.FullChunkStatus currStatus = chunkHolder.getChunkStatus();
+ if (currStatus.isOrAfter(toStatus)) {
+ scheduled = false;
+ chunk = (LevelChunk)chunkHolder.getCurrentChunk();
+ } else {
+ scheduled = true;
+ chunk = null;
+
+ final int radius = toStatus.ordinal() - 1; // 0 -> BORDER, 1 -> TICKING, 2 -> ENTITY_TICKING
+ for (int dz = -radius; dz <= radius; ++dz) {
+ for (int dx = -radius; dx <= radius; ++dx) {
+ final NewChunkHolder neighbour =
+ (dx | dz) == 0 ? chunkHolder : this.chunkHolderManager.getChunkHolder(dx + chunkX, dz + chunkZ);
+ if (neighbour != null) {
+ neighbour.raisePriority(priority);
+ }
+ }
+ }
+
+ // ticket level should schedule for us
+ chunkHolder.addFullStatusConsumer(toStatus, loadCallback);
+ }
+ }
+ } finally {
+ this.schedulingLock.unlock();
+ }
+ } finally {
+ this.chunkHolderManager.ticketLock.unlock();
+ }
+
+ if (!scheduled) {
+ // couldn't schedule
+ try {
+ loadCallback.accept(chunk);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to process chunk full status callback", thr);
+ }
+ }
+ }
+
+ public void scheduleChunkLoad(final int chunkX, final int chunkZ, final boolean gen, final ChunkStatus toStatus, final boolean addTicket,
+ final PrioritisedExecutor.Priority priority, final Consumer<ChunkAccess> onComplete) {
+ if (gen) {
+ this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
+ return;
+ }
+ this.scheduleChunkLoad(chunkX, chunkZ, ChunkStatus.EMPTY, addTicket, priority, (final ChunkAccess chunk) -> {
+ if (chunk == null) {
+ onComplete.accept(null);
+ } else {
+ if (chunk.getStatus().isOrAfter(toStatus)) {
+ this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
+ } else {
+ onComplete.accept(null);
+ }
+ }
+ });
+ }
+
+ public void scheduleChunkLoad(final int chunkX, final int chunkZ, final ChunkStatus toStatus, final boolean addTicket,
+ final PrioritisedExecutor.Priority priority, final Consumer<ChunkAccess> onComplete) {
+ if (!TickThread.isTickThread()) {
+ this.scheduleChunkTask(chunkX, chunkZ, () -> {
+ ChunkTaskScheduler.this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
+ }, priority);
+ return;
+ }
+ if (this.chunkHolderManager.ticketLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot schedule chunk load during ticket level update");
+ }
+ if (this.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Cannot schedule chunk loading recursively");
+ }
+
+ if (toStatus == ChunkStatus.FULL) {
+ this.scheduleTickingState(chunkX, chunkZ, ChunkHolder.FullChunkStatus.BORDER, addTicket, priority, (Consumer)onComplete);
+ return;
+ }
+
+ final int minLevel = 33 + ChunkStatus.getDistance(toStatus);
+ final Long chunkReference = addTicket ? Long.valueOf(this.chunkLoadCounter.getAndIncrement()) : null;
+ final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+
+ if (addTicket) {
+ this.chunkHolderManager.addTicketAtLevel(TicketType.CHUNK_LOAD, chunkKey, minLevel, chunkReference);
+ this.chunkHolderManager.processTicketUpdates();
+ }
+
+ final Consumer<ChunkAccess> loadCallback = (final ChunkAccess chunk) -> {
+ try {
+ if (onComplete != null) {
+ onComplete.accept(chunk);
+ }
+ } finally {
+ if (addTicket) {
+ ChunkTaskScheduler.this.chunkHolderManager.addAndRemoveTickets(chunkKey,
+ TicketType.UNKNOWN, minLevel, new ChunkPos(chunkKey),
+ TicketType.CHUNK_LOAD, minLevel, chunkReference
+ );
+ }
+ }
+ };
+
+ final List<ChunkProgressionTask> tasks = new ArrayList<>();
+
+ final boolean scheduled;
+ final ChunkAccess chunk;
+ this.chunkHolderManager.ticketLock.lock();
+ try {
+ this.schedulingLock.lock();
+ try {
+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey);
+ if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) {
+ scheduled = false;
+ chunk = null;
+ } else {
+ final ChunkStatus genStatus = chunkHolder.getCurrentGenStatus();
+ if (genStatus != null && genStatus.isOrAfter(toStatus)) {
+ scheduled = false;
+ chunk = chunkHolder.getCurrentChunk();
+ } else {
+ scheduled = true;
+ chunk = null;
+ chunkHolder.raisePriority(priority);
+
+ if (!chunkHolder.upgradeGenTarget(toStatus)) {
+ this.schedule(chunkX, chunkZ, toStatus, chunkHolder, tasks);
+ }
+ chunkHolder.addStatusConsumer(toStatus, loadCallback);
+ }
+ }
+ } finally {
+ this.schedulingLock.unlock();
+ }
+ } finally {
+ this.chunkHolderManager.ticketLock.unlock();
+ }
+
+ for (int i = 0, len = tasks.size(); i < len; ++i) {
+ tasks.get(i).schedule();
+ }
+
+ if (!scheduled) {
+ // couldn't schedule
+ try {
+ loadCallback.accept(chunk);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to process chunk status callback", thr);
+ }
+ }
+ }
+
+ private ChunkProgressionTask createTask(final int chunkX, final int chunkZ, final ChunkAccess chunk,
+ final NewChunkHolder chunkHolder, final List<ChunkAccess> neighbours,
+ final ChunkStatus toStatus, final PrioritisedExecutor.Priority initialPriority) {
+ if (toStatus == ChunkStatus.EMPTY) {
+ return new ChunkLoadTask(this, this.world, chunkX, chunkZ, chunkHolder, initialPriority);
+ }
+ if (toStatus == ChunkStatus.LIGHT) {
+ return new ChunkLightTask(this, this.world, chunkX, chunkZ, chunk, initialPriority);
+ }
+ if (toStatus == ChunkStatus.FULL) {
+ return new ChunkFullTask(this, this.world, chunkX, chunkZ, chunkHolder, chunk, initialPriority);
+ }
+
+ return new ChunkUpgradeGenericStatusTask(this, this.world, chunkX, chunkZ, chunk, neighbours, toStatus, initialPriority);
+ }
+
+ ChunkProgressionTask schedule(final int chunkX, final int chunkZ, final ChunkStatus targetStatus, final NewChunkHolder chunkHolder,
+ final List<ChunkProgressionTask> allTasks) {
+ return this.schedule(chunkX, chunkZ, targetStatus, chunkHolder, allTasks, chunkHolder.getEffectivePriority());
+ }
+
+ // rets new task scheduled for the _specified_ chunk
+ // note: this must hold the scheduling lock
+ // minPriority is only used to pass the priority through to neighbours, as priority calculation has not yet been done
+ // schedule will ignore the generation target, so it should be checked by the caller to ensure the target is not regressed!
+ private ChunkProgressionTask schedule(final int chunkX, final int chunkZ, final ChunkStatus targetStatus,
+ final NewChunkHolder chunkHolder, final List<ChunkProgressionTask> allTasks,
+ final PrioritisedExecutor.Priority minPriority) {
+ if (!this.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Not holding scheduling lock");
+ }
+
+ if (chunkHolder.hasGenerationTask()) {
+ chunkHolder.upgradeGenTarget(targetStatus);
+ return null;
+ }
+
+ final PrioritisedExecutor.Priority requestedPriority = PrioritisedExecutor.Priority.max(minPriority, chunkHolder.getEffectivePriority());
+ final ChunkStatus currentGenStatus = chunkHolder.getCurrentGenStatus();
+ final ChunkAccess chunk = chunkHolder.getCurrentChunk();
+
+ if (currentGenStatus == null) {
+ // not yet loaded
+ final ChunkProgressionTask task = this.createTask(
+ chunkX, chunkZ, chunk, chunkHolder, Collections.emptyList(), ChunkStatus.EMPTY, requestedPriority
+ );
+
+ allTasks.add(task);
+
+ final List<NewChunkHolder> chunkHolderNeighbours = new ArrayList<>(1);
+ chunkHolderNeighbours.add(chunkHolder);
+
+ chunkHolder.setGenerationTarget(targetStatus);
+ chunkHolder.setGenerationTask(task, ChunkStatus.EMPTY, chunkHolderNeighbours);
+
+ return task;
+ }
+
+ if (currentGenStatus.isOrAfter(targetStatus)) {
+ // nothing to do
+ return null;
+ }
+
+ // we know for sure now that we want to schedule _something_, so set the target
+ chunkHolder.setGenerationTarget(targetStatus);
+
+ final ChunkStatus chunkRealStatus = chunk.getStatus();
+ final ChunkStatus toStatus = currentGenStatus.getNextStatus();
+
+ // if this chunk has already generated up to or past the specified status, then we don't
+ // need the neighbours AT ALL.
+ final int neighbourReadRadius = chunkRealStatus.isOrAfter(toStatus) ? toStatus.loadRange : toStatus.getRange();
+
+ boolean unGeneratedNeighbours = false;
+
+ // copied from MCUtil.getSpiralOutChunks
+ for (int r = 1; r <= neighbourReadRadius; r++) {
+ int x = -r;
+ int z = r;
+
+ // Iterates the edge of half of the box; then negates for other half.
+ while (x <= r && z > -r) {
+ final int radius = Math.max(Math.abs(x), Math.abs(z));
+ final ChunkStatus requiredNeighbourStatus = ChunkMap.getDependencyStatus(toStatus, radius);
+
+ unGeneratedNeighbours |= this.checkNeighbour(
+ chunkX + x, chunkZ + z, requiredNeighbourStatus, chunkHolder, allTasks, requestedPriority
+ );
+ unGeneratedNeighbours |= this.checkNeighbour(
+ chunkX - x, chunkZ - z, requiredNeighbourStatus, chunkHolder, allTasks, requestedPriority
+ );
+
+ if (x < r) {
+ x++;
+ } else {
+ z--;
+ }
+ }
+ }
+
+ if (unGeneratedNeighbours) {
+ // can't schedule, but neighbour completion will schedule for us when they're ALL done
+
+ // propagate our priority to neighbours
+ chunkHolder.recalculateNeighbourPriorities();
+ return null;
+ }
+
+ // need to gather neighbours
+
+ final List<ChunkAccess> neighbours;
+ final List<NewChunkHolder> chunkHolderNeighbours;
+ if (neighbourReadRadius <= 0) {
+ neighbours = new ArrayList<>(1);
+ chunkHolderNeighbours = new ArrayList<>(1);
+ neighbours.add(chunk);
+ chunkHolderNeighbours.add(chunkHolder);
+ } else {
+ // the iteration order is _very_ important, as all generation statuses expect a certain order such that:
+ // chunkAtRelative = neighbours.get(relX + relZ * (2 * radius + 1))
+ neighbours = new ArrayList<>((2 * neighbourReadRadius + 1) * (2 * neighbourReadRadius + 1));
+ chunkHolderNeighbours = new ArrayList<>((2 * neighbourReadRadius + 1) * (2 * neighbourReadRadius + 1));
+ for (int dz = -neighbourReadRadius; dz <= neighbourReadRadius; ++dz) {
+ for (int dx = -neighbourReadRadius; dx <= neighbourReadRadius; ++dx) {
+ final NewChunkHolder holder = (dx | dz) == 0 ? chunkHolder : this.chunkHolderManager.getChunkHolder(dx + chunkX, dz + chunkZ);
+ neighbours.add(holder.getChunkForNeighbourAccess());
+ chunkHolderNeighbours.add(holder);
+ }
+ }
+ }
+
+ final ChunkProgressionTask task = this.createTask(chunkX, chunkZ, chunk, chunkHolder, neighbours, toStatus, chunkHolder.getEffectivePriority());
+ allTasks.add(task);
+
+ chunkHolder.setGenerationTask(task, toStatus, chunkHolderNeighbours);
+
+ return task;
+ }
+
+ // rets true if the neighbour is not at the required status, false otherwise
+ private boolean checkNeighbour(final int chunkX, final int chunkZ, final ChunkStatus requiredStatus, final NewChunkHolder center,
+ final List<ChunkProgressionTask> tasks, final PrioritisedExecutor.Priority minPriority) {
+ final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkX, chunkZ);
+
+ if (chunkHolder == null) {
+ throw new IllegalStateException("Missing chunkholder when required");
+ }
+
+ final ChunkStatus holderStatus = chunkHolder.getCurrentGenStatus();
+ if (holderStatus != null && holderStatus.isOrAfter(requiredStatus)) {
+ return false;
+ }
+
+ if (chunkHolder.hasFailedGeneration()) {
+ return true;
+ }
+
+ center.addGenerationBlockingNeighbour(chunkHolder);
+ chunkHolder.addWaitingNeighbour(center, requiredStatus);
+
+ if (chunkHolder.upgradeGenTarget(requiredStatus)) {
+ return true;
+ }
+
+ // not at status required, so we need to schedule its generation
+ this.schedule(
+ chunkX, chunkZ, requiredStatus, chunkHolder, tasks, minPriority
+ );
+
+ return true;
+ }
+
+ /**
+ * @deprecated Chunk tasks must be tied to coordinates in the future
+ */
+ @Deprecated
+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run) {
+ return this.scheduleChunkTask(run, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ /**
+ * @deprecated Chunk tasks must be tied to coordinates in the future
+ */
+ @Deprecated
+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return this.mainThreadExecutor.queueRunnable(run, priority);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run) {
+ return this.createChunkTask(chunkX, chunkZ, run, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run,
+ final PrioritisedExecutor.Priority priority) {
+ return this.mainThreadExecutor.createTask(run, priority);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run) {
+ return this.mainThreadExecutor.queueRunnable(run);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run,
+ final PrioritisedExecutor.Priority priority) {
+ return this.mainThreadExecutor.queueRunnable(run, priority);
+ }
+
+ public void executeTasksUntil(final BooleanSupplier exit) {
+ if (Bukkit.isPrimaryThread()) {
+ this.mainThreadExecutor.executeConditionally(exit);
+ } else {
+ long counter = 1L;
+ while (!exit.getAsBoolean()) {
+ counter = ConcurrentUtil.linearLongBackoff(counter, 100_000L, 5_000_000L); // 100us, 5ms
+ }
+ }
+ }
+
+ public boolean halt(final boolean sync, final long maxWaitNS) {
+ this.lightExecutor.halt();
+ this.genExecutor.halt();
+ this.parallelGenExecutor.halt();
+ this.loadExecutor.halt();
+ final long time = System.nanoTime();
+ if (sync) {
+ for (long failures = 9L;; failures = ConcurrentUtil.linearLongBackoff(failures, 500_000L, 50_000_000L)) {
+ if (
+ !this.lightExecutor.isActive() &&
+ !this.genExecutor.isActive() &&
+ !this.parallelGenExecutor.isActive() &&
+ !this.loadExecutor.isActive()
+ ) {
+ return true;
+ }
+ if ((System.nanoTime() - time) >= maxWaitNS) {
+ return false;
+ }
+ }
+ }
+
+ return true;
+ }
+
+ public static final ArrayDeque<ChunkInfo> WAITING_CHUNKS = new ArrayDeque<>(); // stack
+
+ public static final class ChunkInfo {
+
+ public final int chunkX;
+ public final int chunkZ;
+ public final ServerLevel world;
+
+ public ChunkInfo(final int chunkX, final int chunkZ, final ServerLevel world) {
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.world = world;
+ }
+
+ @Override
+ public String toString() {
+ return "[( " + this.chunkX + "," + this.chunkZ + ") in '" + this.world.getWorld().getName() + "']";
+ }
+ }
+
+ public static void pushChunkWait(final ServerLevel world, final int chunkX, final int chunkZ) {
+ synchronized (WAITING_CHUNKS) {
+ WAITING_CHUNKS.push(new ChunkInfo(chunkX, chunkZ, world));
+ }
+ }
+
+ public static void popChunkWait() {
+ synchronized (WAITING_CHUNKS) {
+ WAITING_CHUNKS.pop();
+ }
+ }
+
+ public static ChunkInfo[] getChunkInfos() {
+ synchronized (WAITING_CHUNKS) {
+ return WAITING_CHUNKS.toArray(new ChunkInfo[0]);
+ }
+ }
+
+ public static void dumpAllChunkLoadInfo(final boolean longPrint) {
+ final ChunkInfo[] chunkInfos = getChunkInfos();
+ if (chunkInfos.length > 0) {
+ LOGGER.error("Chunk wait task info below: ");
+ for (final ChunkInfo chunkInfo : chunkInfos) {
+ final NewChunkHolder holder = chunkInfo.world.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkInfo.chunkX, chunkInfo.chunkZ);
+ LOGGER.error("Chunk wait: " + chunkInfo);
+ LOGGER.error("Chunk holder: " + holder);
+ }
+
+ if (longPrint) {
+ final File file = new File(new File(new File("."), "debug"), "chunks-watchdog.txt");
+ LOGGER.error("Writing chunk information dump to " + file);
+ try {
+ MCUtil.dumpChunks(file, true);
+ LOGGER.error("Successfully written chunk information!");
+ } catch (final Throwable thr) {
+ MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr);
+ }
+ }
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..73ce0909bd89244835a0d0f2030a25871461f1e0
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java
@@ -0,0 +1,209 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import com.mojang.datafixers.util.Either;
+import com.mojang.logging.LogUtils;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerChunkCache;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.ProtoChunk;
+import org.slf4j.Logger;
+import java.lang.invoke.VarHandle;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+
+public final class ChunkUpgradeGenericStatusTask extends ChunkProgressionTask implements Runnable {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ protected final ChunkAccess fromChunk;
+ protected final ChunkStatus fromStatus;
+ protected final ChunkStatus toStatus;
+ protected final List<ChunkAccess> neighbours;
+
+ protected final PrioritisedExecutor.PrioritisedTask generateTask;
+
+ public ChunkUpgradeGenericStatusTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX,
+ final int chunkZ, final ChunkAccess chunk, final List<ChunkAccess> neighbours,
+ final ChunkStatus toStatus, final PrioritisedExecutor.Priority priority) {
+ super(scheduler, world, chunkX, chunkZ);
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.fromChunk = chunk;
+ this.fromStatus = chunk.getStatus();
+ this.toStatus = toStatus;
+ this.neighbours = neighbours;
+ this.generateTask = (this.toStatus.isParallelCapable ? this.scheduler.parallelGenExecutor : this.scheduler.genExecutor)
+ .createTask(this, priority);
+ }
+
+ @Override
+ public ChunkStatus getTargetStatus() {
+ return this.toStatus;
+ }
+
+ private boolean isEmptyTask() {
+ // must use fromStatus here to avoid any race condition with run() overwriting the status
+ final boolean generation = !this.fromStatus.isOrAfter(this.toStatus);
+ return (generation && this.toStatus.isEmptyGenStatus()) || (!generation && this.toStatus.isEmptyLoadStatus());
+ }
+
+ @Override
+ public void run() {
+ final ChunkAccess chunk = this.fromChunk;
+
+ final ServerChunkCache serverChunkCache = this.world.chunkSource;
+ final ChunkMap chunkMap = serverChunkCache.chunkMap;
+
+ final CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completeFuture;
+
+ final boolean generation;
+ boolean completing = false;
+
+ // note: should optimise the case where the chunk does not need to execute the status, because
+ // schedule() calls this synchronously if it will run through that path
+
+ try {
+ generation = !chunk.getStatus().isOrAfter(this.toStatus);
+ if (generation) {
+ if (this.toStatus.isEmptyGenStatus()) {
+ if (chunk instanceof ProtoChunk) {
+ ((ProtoChunk)chunk).setStatus(this.toStatus);
+ }
+ completing = true;
+ this.complete(chunk, null);
+ return;
+ }
+ completeFuture = this.toStatus.generate(Runnable::run, this.world, chunkMap.generator, chunkMap.structureTemplateManager,
+ serverChunkCache.getLightEngine(), null, this.neighbours, false)
+ .whenComplete((final Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either, final Throwable throwable) -> {
+ final ChunkAccess newChunk = (either == null) ? null : either.left().orElse(null);
+ if (newChunk instanceof ProtoChunk) {
+ ((ProtoChunk)newChunk).setStatus(ChunkUpgradeGenericStatusTask.this.toStatus);
+ }
+ }
+ );
+ } else {
+ if (this.toStatus.isEmptyLoadStatus()) {
+ completing = true;
+ this.complete(chunk, null);
+ return;
+ }
+ completeFuture = this.toStatus.load(this.world, chunkMap.structureTemplateManager, serverChunkCache.getLightEngine(), null, chunk);
+ }
+ } catch (final Throwable throwable) {
+ if (!completing) {
+ this.complete(null, throwable);
+
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ return;
+ }
+
+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Target status", ChunkTaskScheduler.stringIfNull(this.toStatus),
+ "From status", ChunkTaskScheduler.stringIfNull(this.fromStatus),
+ "Generation task", this
+ ), throwable);
+
+ if (!(throwable instanceof ThreadDeath)) {
+ LOGGER.error("Failed to complete status for chunk: status:" + this.toStatus + ", chunk: (" + this.chunkX + "," + this.chunkZ + "), world: " + this.world.getWorld().getName(), throwable);
+ } else {
+ // ensure the chunk system can respond, then die
+ throw (ThreadDeath)throwable;
+ }
+ return;
+ }
+
+ if (!completeFuture.isDone() && !this.toStatus.warnedAboutNoImmediateComplete.getAndSet(true)) {
+ LOGGER.warn("Future status not complete after scheduling: " + this.toStatus.toString() + ", generate: " + generation);
+ }
+
+ final Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either;
+ final ChunkAccess newChunk;
+
+ try {
+ either = completeFuture.join();
+ newChunk = (either == null) ? null : either.left().orElse(null);
+ } catch (final Throwable throwable) {
+ this.complete(null, throwable);
+ // ensure the chunk system can respond, then die
+ if (throwable instanceof ThreadDeath) {
+ throw (ThreadDeath)throwable;
+ }
+ return;
+ }
+
+ if (newChunk == null) {
+ this.complete(null, new IllegalStateException("Chunk for status: " + ChunkUpgradeGenericStatusTask.this.toStatus.toString() + ", generation: " + generation + " should not be null! Either: " + either).fillInStackTrace());
+ return;
+ }
+
+ this.complete(newChunk, null);
+ }
+
+ protected volatile boolean scheduled;
+ protected static final VarHandle SCHEDULED_HANDLE = ConcurrentUtil.getVarHandle(ChunkUpgradeGenericStatusTask.class, "scheduled", boolean.class);
+
+ @Override
+ public boolean isScheduled() {
+ return this.scheduled;
+ }
+
+ @Override
+ public void schedule() {
+ if ((boolean)SCHEDULED_HANDLE.getAndSet((ChunkUpgradeGenericStatusTask)this, true)) {
+ throw new IllegalStateException("Cannot double call schedule()");
+ }
+ if (this.isEmptyTask()) {
+ if (this.generateTask.cancel()) {
+ this.run();
+ }
+ } else {
+ this.generateTask.queue();
+ }
+ }
+
+ @Override
+ public void cancel() {
+ if (this.generateTask.cancel()) {
+ this.complete(null, null);
+ }
+ }
+
+ @Override
+ public PrioritisedExecutor.Priority getPriority() {
+ return this.generateTask.getPriority();
+ }
+
+ @Override
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.generateTask.lowerPriority(priority);
+ }
+
+ @Override
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.generateTask.setPriority(priority);
+ }
+
+ @Override
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.generateTask.raisePriority(priority);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..396d72c00e47cf1669ae20dc839c1c961b1f262a
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java
@@ -0,0 +1,746 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.completable.Completable;
+import ca.spottedleaf.concurrentutil.executor.Cancellable;
+import ca.spottedleaf.concurrentutil.executor.standard.DelayedPrioritisedTask;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.chunk.system.io.RegionFileIOThread;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.level.ServerLevel;
+import org.slf4j.Logger;
+import java.lang.invoke.VarHandle;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.BiConsumer;
+
+public abstract class GenericDataLoadTask<OnMain,FinalCompletion> {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ protected static final CompoundTag CANCELLED_DATA = new CompoundTag();
+
+ // reference count is the upper 32 bits
+ protected final AtomicLong stageAndReferenceCount = new AtomicLong(STAGE_NOT_STARTED);
+
+ protected static final long STAGE_MASK = 0xFFFFFFFFL;
+ protected static final long STAGE_CANCELLED = 0xFFFFFFFFL;
+ protected static final long STAGE_NOT_STARTED = 0L;
+ protected static final long STAGE_LOADING = 1L;
+ protected static final long STAGE_PROCESSING = 2L;
+ protected static final long STAGE_COMPLETED = 3L;
+
+ // for loading data off disk
+ protected final LoadDataFromDiskTask loadDataFromDiskTask;
+ // processing off-main
+ protected final PrioritisedExecutor.PrioritisedTask processOffMain;
+ // processing on-main
+ protected final PrioritisedExecutor.PrioritisedTask processOnMain;
+
+ protected final ChunkTaskScheduler scheduler;
+ protected final ServerLevel world;
+ protected final int chunkX;
+ protected final int chunkZ;
+ protected final RegionFileIOThread.RegionFileType type;
+
+ public GenericDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX,
+ final int chunkZ, final RegionFileIOThread.RegionFileType type,
+ final PrioritisedExecutor.Priority priority) {
+ this.scheduler = scheduler;
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.type = type;
+
+ final ProcessOnMainTask mainTask;
+ if (this.hasOnMain()) {
+ mainTask = new ProcessOnMainTask();
+ this.processOnMain = this.createOnMain(mainTask, priority);
+ } else {
+ mainTask = null;
+ this.processOnMain = null;
+ }
+
+ final ProcessOffMainTask offMainTask;
+ if (this.hasOffMain()) {
+ offMainTask = new ProcessOffMainTask(mainTask);
+ this.processOffMain = this.createOffMain(offMainTask, priority);
+ } else {
+ offMainTask = null;
+ this.processOffMain = null;
+ }
+
+ if (this.processOffMain == null && this.processOnMain == null) {
+ throw new IllegalStateException("Illegal class implementation: " + this.getClass().getName() + ", should be able to schedule at least one task!");
+ }
+
+ this.loadDataFromDiskTask = new LoadDataFromDiskTask(world, chunkX, chunkZ, type, new DataLoadCallback(offMainTask, mainTask), priority);
+ }
+
+ public static final record TaskResult<L, R>(L left, R right) {}
+
+ protected abstract boolean hasOffMain();
+
+ protected abstract boolean hasOnMain();
+
+ protected abstract PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority);
+
+ protected abstract PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority);
+
+ protected abstract TaskResult<OnMain, Throwable> runOffMain(final CompoundTag data, final Throwable throwable);
+
+ protected abstract TaskResult<FinalCompletion, Throwable> runOnMain(final OnMain data, final Throwable throwable);
+
+ protected abstract void onComplete(final TaskResult<FinalCompletion,Throwable> result);
+
+ protected abstract TaskResult<FinalCompletion, Throwable> completeOnMainOffMain(final OnMain data, final Throwable throwable);
+
+ @Override
+ public String toString() {
+ return "GenericDataLoadTask{class: " + this.getClass().getName() + ", world: " + this.world.getWorld().getName() +
+ ", chunk: (" + this.chunkX + "," + this.chunkZ + "), hashcode: " + System.identityHashCode(this) + ", priority: " + this.getPriority() +
+ ", type: " + this.type.toString() + "}";
+ }
+
+ public PrioritisedExecutor.Priority getPriority() {
+ if (this.processOnMain != null) {
+ return this.processOnMain.getPriority();
+ } else {
+ return this.processOffMain.getPriority();
+ }
+ }
+
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ // can't lower I/O tasks, we don't know what they affect
+ if (this.processOffMain != null) {
+ this.processOffMain.lowerPriority(priority);
+ }
+ if (this.processOnMain != null) {
+ this.processOnMain.lowerPriority(priority);
+ }
+ }
+
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ // can't lower I/O tasks, we don't know what they affect
+ this.loadDataFromDiskTask.raisePriority(priority);
+ if (this.processOffMain != null) {
+ this.processOffMain.setPriority(priority);
+ }
+ if (this.processOnMain != null) {
+ this.processOnMain.setPriority(priority);
+ }
+ }
+
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ // can't lower I/O tasks, we don't know what they affect
+ this.loadDataFromDiskTask.raisePriority(priority);
+ if (this.processOffMain != null) {
+ this.processOffMain.raisePriority(priority);
+ }
+ if (this.processOnMain != null) {
+ this.processOnMain.raisePriority(priority);
+ }
+ }
+
+ // returns whether scheduleNow() needs to be called
+ public boolean schedule(final boolean delay) {
+ if (this.stageAndReferenceCount.get() != STAGE_NOT_STARTED ||
+ !this.stageAndReferenceCount.compareAndSet(STAGE_NOT_STARTED, (1L << 32) | STAGE_LOADING)) {
+ // try and increment reference count
+ int failures = 0;
+ for (long curr = this.stageAndReferenceCount.get();;) {
+ if ((curr & STAGE_MASK) == STAGE_CANCELLED || (curr & STAGE_MASK) == STAGE_COMPLETED) {
+ // cancelled or completed, nothing to do here
+ return false;
+ }
+
+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, curr + (1L << 32)))) {
+ // successful
+ return false;
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ if (!delay) {
+ this.scheduleNow();
+ return false;
+ }
+ return true;
+ }
+
+ public void scheduleNow() {
+ this.loadDataFromDiskTask.schedule(); // will schedule the rest
+ }
+
+ // assumes the current stage cannot be completed
+ // returns false if cancelled, returns true if can proceed
+ private boolean advanceStage(final long expect, final long to) {
+ int failures = 0;
+ for (long curr = this.stageAndReferenceCount.get();;) {
+ if ((curr & STAGE_MASK) != expect) {
+ // must be cancelled
+ return false;
+ }
+
+ final long newVal = (curr & ~STAGE_MASK) | to;
+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) {
+ return true;
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public boolean cancel() {
+ int failures = 0;
+ for (long curr = this.stageAndReferenceCount.get();;) {
+ if ((curr & STAGE_MASK) == STAGE_COMPLETED || (curr & STAGE_MASK) == STAGE_CANCELLED) {
+ return false;
+ }
+
+ if ((curr & STAGE_MASK) == STAGE_NOT_STARTED || (curr & ~STAGE_MASK) == (1L << 32)) {
+ // no other references, so we can cancel
+ final long newVal = STAGE_CANCELLED;
+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) {
+ this.loadDataFromDiskTask.cancel();
+ if (this.processOffMain != null) {
+ this.processOffMain.cancel();
+ }
+ if (this.processOnMain != null) {
+ this.processOnMain.cancel();
+ }
+ this.onComplete(null);
+ return true;
+ }
+ } else {
+ if ((curr & ~STAGE_MASK) == (0L << 32)) {
+ throw new IllegalStateException("Reference count cannot be zero here");
+ }
+ // just decrease the reference count
+ final long newVal = curr - (1L << 32);
+ if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) {
+ return false;
+ }
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ protected final class DataLoadCallback implements BiConsumer<CompoundTag, Throwable> {
+
+ protected final ProcessOffMainTask offMainTask;
+ protected final ProcessOnMainTask onMainTask;
+
+ public DataLoadCallback(final ProcessOffMainTask offMainTask, final ProcessOnMainTask onMainTask) {
+ this.offMainTask = offMainTask;
+ this.onMainTask = onMainTask;
+ }
+
+ @Override
+ public void accept(final CompoundTag compoundTag, final Throwable throwable) {
+ if (GenericDataLoadTask.this.stageAndReferenceCount.get() == STAGE_CANCELLED) {
+ // don't try to schedule further
+ return;
+ }
+
+ try {
+ if (compoundTag == CANCELLED_DATA) {
+ // cancelled, except this isn't possible
+ LOGGER.error("Data callback says cancelled, but stage does not?");
+ return;
+ }
+
+ // get off of the regionfile callback ASAP, no clue what locks are held right now...
+ if (GenericDataLoadTask.this.processOffMain != null) {
+ this.offMainTask.data = compoundTag;
+ this.offMainTask.throwable = throwable;
+ GenericDataLoadTask.this.processOffMain.queue();
+ return;
+ } else {
+ // no off-main task, so go straight to main
+ this.onMainTask.data = (OnMain)compoundTag;
+ this.onMainTask.throwable = throwable;
+ GenericDataLoadTask.this.processOnMain.queue();
+ }
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr2) {
+ LOGGER.error("Failed I/O callback for task: " + GenericDataLoadTask.this.toString(), thr2);
+ GenericDataLoadTask.this.scheduler.unrecoverableChunkSystemFailure(
+ GenericDataLoadTask.this.chunkX, GenericDataLoadTask.this.chunkZ, Map.of(
+ "Callback throwable", ChunkTaskScheduler.stringIfNull(throwable)
+ ), thr2);
+ }
+ }
+ }
+
+ protected final class ProcessOffMainTask implements Runnable {
+
+ protected CompoundTag data;
+ protected Throwable throwable;
+ protected final ProcessOnMainTask schedule;
+
+ public ProcessOffMainTask(final ProcessOnMainTask schedule) {
+ this.schedule = schedule;
+ }
+
+ @Override
+ public void run() {
+ if (!GenericDataLoadTask.this.advanceStage(STAGE_LOADING, this.schedule == null ? STAGE_COMPLETED : STAGE_PROCESSING)) {
+ // cancelled
+ return;
+ }
+ final TaskResult<OnMain, Throwable> newData = GenericDataLoadTask.this.runOffMain(this.data, this.throwable);
+
+ if (GenericDataLoadTask.this.stageAndReferenceCount.get() == STAGE_CANCELLED) {
+ // don't try to schedule further
+ return;
+ }
+
+ if (this.schedule != null) {
+ final TaskResult<FinalCompletion, Throwable> syncComplete = GenericDataLoadTask.this.completeOnMainOffMain(newData.left, newData.right);
+
+ if (syncComplete != null) {
+ if (GenericDataLoadTask.this.advanceStage(STAGE_PROCESSING, STAGE_COMPLETED)) {
+ GenericDataLoadTask.this.onComplete(syncComplete);
+ } // else: cancelled
+ return;
+ }
+
+ this.schedule.data = newData.left;
+ this.schedule.throwable = newData.right;
+
+ GenericDataLoadTask.this.processOnMain.queue();
+ } else {
+ GenericDataLoadTask.this.onComplete((TaskResult<FinalCompletion, Throwable>)newData);
+ }
+ }
+ }
+
+ protected final class ProcessOnMainTask implements Runnable {
+
+ protected OnMain data;
+ protected Throwable throwable;
+
+ @Override
+ public void run() {
+ if (!GenericDataLoadTask.this.advanceStage(STAGE_PROCESSING, STAGE_COMPLETED)) {
+ // cancelled
+ return;
+ }
+ final TaskResult<FinalCompletion, Throwable> result = GenericDataLoadTask.this.runOnMain(this.data, this.throwable);
+
+ GenericDataLoadTask.this.onComplete(result);
+ }
+ }
+
+ public static final class LoadDataFromDiskTask {
+
+ protected volatile int priority;
+ protected static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(LoadDataFromDiskTask.class, "priority", int.class);
+
+ protected static final int PRIORITY_EXECUTED = Integer.MIN_VALUE >>> 0;
+ protected static final int PRIORITY_LOAD_SCHEDULED = Integer.MIN_VALUE >>> 1;
+ protected static final int PRIORITY_UNLOAD_SCHEDULED = Integer.MIN_VALUE >>> 2;
+
+ protected static final int PRIORITY_FLAGS = ~Character.MAX_VALUE;
+
+ protected final int getPriorityVolatile() {
+ return (int)PRIORITY_HANDLE.getVolatile((LoadDataFromDiskTask)this);
+ }
+
+ protected final int compareAndExchangePriorityVolatile(final int expect, final int update) {
+ return (int)PRIORITY_HANDLE.compareAndExchange((LoadDataFromDiskTask)this, (int)expect, (int)update);
+ }
+
+ protected final int getAndOrPriorityVolatile(final int val) {
+ return (int)PRIORITY_HANDLE.getAndBitwiseOr((LoadDataFromDiskTask)this, (int)val);
+ }
+
+ protected final void setPriorityPlain(final int val) {
+ PRIORITY_HANDLE.set((LoadDataFromDiskTask)this, (int)val);
+ }
+
+ private final ServerLevel world;
+ private final int chunkX;
+ private final int chunkZ;
+
+ private final RegionFileIOThread.RegionFileType type;
+ private Cancellable dataLoadTask;
+ private Cancellable dataUnloadCancellable;
+ private DelayedPrioritisedTask dataUnloadTask;
+
+ private final BiConsumer<CompoundTag, Throwable> onComplete;
+
+ // onComplete should be caller sensitive, it may complete synchronously with schedule() - which does
+ // hold a priority lock.
+ public LoadDataFromDiskTask(final ServerLevel world, final int chunkX, final int chunkZ,
+ final RegionFileIOThread.RegionFileType type,
+ final BiConsumer<CompoundTag, Throwable> onComplete,
+ final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.type = type;
+ this.onComplete = onComplete;
+ this.setPriorityPlain(priority.priority);
+ }
+
+ private void complete(final CompoundTag data, final Throwable throwable) {
+ try {
+ this.onComplete.accept(data, throwable);
+ } catch (final Throwable thr2) {
+ this.world.chunkTaskScheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Completed throwable", ChunkTaskScheduler.stringIfNull(throwable),
+ "Regionfile type", ChunkTaskScheduler.stringIfNull(this.type)
+ ), thr2);
+ if (thr2 instanceof ThreadDeath) {
+ throw (ThreadDeath)thr2;
+ }
+ }
+ }
+
+ protected boolean markExecuting() {
+ return (this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) == 0;
+ }
+
+ protected boolean isMarkedExecuted() {
+ return (this.getPriorityVolatile() & PRIORITY_EXECUTED) != 0;
+ }
+
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+
+ int failures = 0;
+ for (int curr = this.getPriorityVolatile();;) {
+ if ((curr & PRIORITY_EXECUTED) != 0) {
+ // cancelled or executed
+ return;
+ }
+
+ if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) {
+ RegionFileIOThread.lowerPriority(this.world, this.chunkX, this.chunkZ, this.type, priority);
+ return;
+ }
+
+ if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) {
+ if (this.dataUnloadTask != null) {
+ this.dataUnloadTask.lowerPriority(priority);
+ }
+ // no return - we need to propagate priority
+ }
+
+ if (!priority.isHigherPriority(curr & ~PRIORITY_FLAGS)) {
+ return;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) {
+ return;
+ }
+
+ // failed, retry
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+
+ int failures = 0;
+ for (int curr = this.getPriorityVolatile();;) {
+ if ((curr & PRIORITY_EXECUTED) != 0) {
+ // cancelled or executed
+ return;
+ }
+
+ if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) {
+ RegionFileIOThread.setPriority(this.world, this.chunkX, this.chunkZ, this.type, priority);
+ return;
+ }
+
+ if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) {
+ if (this.dataUnloadTask != null) {
+ this.dataUnloadTask.setPriority(priority);
+ }
+ // no return - we need to propagate priority
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) {
+ return;
+ }
+
+ // failed, retry
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+
+ int failures = 0;
+ for (int curr = this.getPriorityVolatile();;) {
+ if ((curr & PRIORITY_EXECUTED) != 0) {
+ // cancelled or executed
+ return;
+ }
+
+ if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) {
+ RegionFileIOThread.raisePriority(this.world, this.chunkX, this.chunkZ, this.type, priority);
+ return;
+ }
+
+ if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) {
+ if (this.dataUnloadTask != null) {
+ this.dataUnloadTask.raisePriority(priority);
+ }
+ // no return - we need to propagate priority
+ }
+
+ if (!priority.isLowerPriority(curr & ~PRIORITY_FLAGS)) {
+ return;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) {
+ return;
+ }
+
+ // failed, retry
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public void cancel() {
+ if ((this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) != 0) {
+ // cancelled or executed already
+ return;
+ }
+
+ // OK if we miss the field read, the task cannot complete if the cancelled bit is set and
+ // the write to dataLoadTask will check for the cancelled bit
+ if (this.dataUnloadCancellable != null) {
+ this.dataUnloadCancellable.cancel();
+ }
+
+ if (this.dataLoadTask != null) {
+ this.dataLoadTask.cancel();
+ }
+
+ this.complete(CANCELLED_DATA, null);
+ }
+
+ private final AtomicBoolean scheduled = new AtomicBoolean();
+
+ public void schedule() {
+ if (this.scheduled.getAndSet(true)) {
+ throw new IllegalStateException("schedule() called twice");
+ }
+ int priority = this.getPriorityVolatile();
+
+ if ((priority & PRIORITY_EXECUTED) != 0) {
+ // cancelled
+ return;
+ }
+
+ final BiConsumer<CompoundTag, Throwable> consumer = (final CompoundTag data, final Throwable thr) -> {
+ // because cancelScheduled() cannot actually stop this task from executing in every case, we need
+ // to mark complete here to ensure we do not double complete
+ if (LoadDataFromDiskTask.this.markExecuting()) {
+ LoadDataFromDiskTask.this.complete(data, thr);
+ } // else: cancelled
+ };
+
+ final PrioritisedExecutor.Priority initialPriority = PrioritisedExecutor.Priority.getPriority(priority);
+ boolean scheduledUnload = false;
+
+ final NewChunkHolder holder = this.world.chunkTaskScheduler.chunkHolderManager.getChunkHolder(this.chunkX, this.chunkZ);
+ if (holder != null) {
+ final BiConsumer<CompoundTag, Throwable> unloadConsumer = (final CompoundTag data, final Throwable thr) -> {
+ if (data != null) {
+ consumer.accept(data, null);
+ } else {
+ // need to schedule task
+ LoadDataFromDiskTask.this.schedule(false, consumer, PrioritisedExecutor.Priority.getPriority(LoadDataFromDiskTask.this.getPriorityVolatile() & ~PRIORITY_FLAGS));
+ }
+ };
+ Cancellable unloadCancellable = null;
+ CompoundTag syncComplete = null;
+ final NewChunkHolder.UnloadTask unloadTask = holder.getUnloadTask(this.type); // can be null if no task exists
+ final Completable<CompoundTag> unloadCompletable = unloadTask == null ? null : unloadTask.completable();
+ if (unloadCompletable != null) {
+ unloadCancellable = unloadCompletable.addAsynchronousWaiter(unloadConsumer);
+ if (unloadCancellable == null) {
+ syncComplete = unloadCompletable.getResult();
+ }
+ }
+
+ if (syncComplete != null) {
+ consumer.accept(syncComplete, null);
+ return;
+ }
+
+ if (unloadCancellable != null) {
+ scheduledUnload = true;
+ this.dataUnloadCancellable = unloadCancellable;
+ this.dataUnloadTask = unloadTask.task();
+ }
+ }
+
+ this.schedule(scheduledUnload, consumer, initialPriority);
+ }
+
+ private void schedule(final boolean scheduledUnload, final BiConsumer<CompoundTag, Throwable> consumer, final PrioritisedExecutor.Priority initialPriority) {
+ int priority = this.getPriorityVolatile();
+
+ if ((priority & PRIORITY_EXECUTED) != 0) {
+ // cancelled
+ return;
+ }
+
+ if (!scheduledUnload) {
+ this.dataLoadTask = RegionFileIOThread.loadDataAsync(
+ this.world, this.chunkX, this.chunkZ, this.type, consumer,
+ initialPriority.isHigherPriority(PrioritisedExecutor.Priority.NORMAL), initialPriority
+ );
+ }
+
+ int failures = 0;
+ for (;;) {
+ if (priority == (priority = this.compareAndExchangePriorityVolatile(priority, priority | (scheduledUnload ? PRIORITY_UNLOAD_SCHEDULED : PRIORITY_LOAD_SCHEDULED)))) {
+ return;
+ }
+
+ if ((priority & PRIORITY_EXECUTED) != 0) {
+ // cancelled or executed
+ if (this.dataUnloadCancellable != null) {
+ this.dataUnloadCancellable.cancel();
+ }
+
+ if (this.dataLoadTask != null) {
+ this.dataLoadTask.cancel();
+ }
+ return;
+ }
+
+ if (scheduledUnload) {
+ if (this.dataUnloadTask != null) {
+ this.dataUnloadTask.setPriority(PrioritisedExecutor.Priority.getPriority(priority & ~PRIORITY_FLAGS));
+ }
+ } else {
+ RegionFileIOThread.setPriority(this.world, this.chunkX, this.chunkZ, this.type, PrioritisedExecutor.Priority.getPriority(priority & ~PRIORITY_FLAGS));
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ /*
+ private static final class LoadDataPriorityHolder extends PriorityHolder {
+
+ protected final LoadDataFromDiskTask task;
+
+ protected LoadDataPriorityHolder(final PrioritisedExecutor.Priority priority, final LoadDataFromDiskTask task) {
+ super(priority);
+ this.task = task;
+ }
+
+ @Override
+ protected void cancelScheduled() {
+ final Cancellable dataLoadTask = this.task.dataLoadTask;
+ if (dataLoadTask != null) {
+ // OK if we miss the field read, the task cannot complete if the cancelled bit is set and
+ // the write to dataLoadTask will check for the cancelled bit
+ this.task.dataLoadTask.cancel();
+ }
+ this.task.complete(CANCELLED_DATA, null);
+ }
+
+ @Override
+ protected PrioritisedExecutor.Priority getScheduledPriority() {
+ final LoadDataFromDiskTask task = this.task;
+ return RegionFileIOThread.getPriority(task.world, task.chunkX, task.chunkZ, task.type);
+ }
+
+ @Override
+ protected void scheduleTask(final PrioritisedExecutor.Priority priority) {
+ final LoadDataFromDiskTask task = this.task;
+ final BiConsumer<CompoundTag, Throwable> consumer = (final CompoundTag data, final Throwable thr) -> {
+ // because cancelScheduled() cannot actually stop this task from executing in every case, we need
+ // to mark complete here to ensure we do not double complete
+ if (LoadDataPriorityHolder.this.markExecuting()) {
+ LoadDataPriorityHolder.this.task.complete(data, thr);
+ } // else: cancelled
+ };
+ task.dataLoadTask = RegionFileIOThread.loadDataAsync(
+ task.world, task.chunkX, task.chunkZ, task.type, consumer,
+ priority.isHigherPriority(PrioritisedExecutor.Priority.NORMAL), priority
+ );
+ if (this.isMarkedExecuted()) {
+ // if we are marked as completed, it could be:
+ // 1. we were cancelled
+ // 2. the consumer was completed
+ // in the 2nd case, cancel() does nothing
+ // in the 1st case, we ensure cancel() is called as it is possible for the cancelling thread
+ // to miss the field write here
+ task.dataLoadTask.cancel();
+ }
+ }
+
+ @Override
+ protected void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority) {
+ final LoadDataFromDiskTask task = this.task;
+ RegionFileIOThread.lowerPriority(task.world, task.chunkX, task.chunkZ, task.type, priority);
+ }
+
+ @Override
+ protected void setPriorityScheduled(final PrioritisedExecutor.Priority priority) {
+ final LoadDataFromDiskTask task = this.task;
+ RegionFileIOThread.setPriority(task.world, task.chunkX, task.chunkZ, task.type, priority);
+ }
+
+ @Override
+ protected void raisePriorityScheduled(final PrioritisedExecutor.Priority priority) {
+ final LoadDataFromDiskTask task = this.task;
+ RegionFileIOThread.raisePriority(task.world, task.chunkX, task.chunkZ, task.type, priority);
+ }
+ }
+ */
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java
new file mode 100644
index 0000000000000000000000000000000000000000..4ce6df7082d4f7ed3651e3d57e379f95dd05715e
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java
@@ -0,0 +1,2075 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.completable.Completable;
+import ca.spottedleaf.concurrentutil.executor.Cancellable;
+import ca.spottedleaf.concurrentutil.executor.standard.DelayedPrioritisedTask;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonPrimitive;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.chunk.system.io.RegionFileIOThread;
+import io.papermc.paper.chunk.system.poi.PoiChunk;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import io.papermc.paper.util.WorldUtil;
+import io.papermc.paper.world.ChunkEntitySlices;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectLinkedOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ReferenceLinkedOpenHashSet;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.TicketType;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.ImposterProtoChunk;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.storage.ChunkSerializer;
+import net.minecraft.world.level.chunk.storage.EntityStorage;
+import org.slf4j.Logger;
+import java.lang.invoke.VarHandle;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Consumer;
+
+public final class NewChunkHolder {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ public static final Thread.UncaughtExceptionHandler CHUNKSYSTEM_UNCAUGHT_EXCEPTION_HANDLER = new Thread.UncaughtExceptionHandler() {
+ @Override
+ public void uncaughtException(final Thread thread, final Throwable throwable) {
+ if (!(throwable instanceof ThreadDeath)) {
+ LOGGER.error("Uncaught exception in thread " + thread.getName(), throwable);
+ }
+ }
+ };
+
+ public final ServerLevel world;
+ public final int chunkX;
+ public final int chunkZ;
+
+ public final ChunkTaskScheduler scheduler;
+
+ // load/unload state
+
+ // chunk data state
+
+ private ChunkEntitySlices entityChunk;
+ // entity chunk that is loaded, but not yet deserialized
+ private CompoundTag pendingEntityChunk;
+
+ ChunkEntitySlices loadInEntityChunk(final boolean transientChunk) {
+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot sync load entity data off-main");
+ final CompoundTag entityChunk;
+ final ChunkEntitySlices ret;
+ this.scheduler.schedulingLock.lock();
+ try {
+ if (this.entityChunk != null && (transientChunk || !this.entityChunk.isTransient())) {
+ return this.entityChunk;
+ }
+ final CompoundTag pendingEntityChunk = this.pendingEntityChunk;
+ if (!transientChunk && pendingEntityChunk == null) {
+ throw new IllegalStateException("Must load entity data from disk before loading in the entity chunk!");
+ }
+
+ if (this.entityChunk == null) {
+ ret = this.entityChunk = new ChunkEntitySlices(
+ this.world, this.chunkX, this.chunkZ, this.getChunkStatus(),
+ WorldUtil.getMinSection(this.world), WorldUtil.getMaxSection(this.world)
+ );
+
+ ret.setTransient(transientChunk);
+
+ this.world.getEntityLookup().entitySectionLoad(this.chunkX, this.chunkZ, ret);
+ } else {
+ // transientChunk = false here
+ ret = this.entityChunk;
+ this.entityChunk.setTransient(false);
+ }
+
+ if (!transientChunk) {
+ this.pendingEntityChunk = null;
+ entityChunk = pendingEntityChunk == EMPTY_ENTITY_CHUNK ? null : pendingEntityChunk;
+ } else {
+ entityChunk = null;
+ }
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+
+ if (!transientChunk) {
+ if (entityChunk != null) {
+ final List<Entity> entities = EntityStorage.readEntities(this.world, entityChunk);
+
+ this.world.getEntityLookup().addEntityChunkEntities(entities);
+ }
+ }
+
+ return ret;
+ }
+
+ // needed to distinguish whether the entity chunk has been read from disk but is empty or whether it has _not_
+ // been read from disk
+ private static final CompoundTag EMPTY_ENTITY_CHUNK = new CompoundTag();
+
+ private ChunkLoadTask.EntityDataLoadTask entityDataLoadTask;
+ // note: if entityDataLoadTask is cancelled, but on its completion entityDataLoadTaskWaiters.size() != 0,
+ // then the task is rescheduled
+ private List<GenericDataLoadTaskCallback> entityDataLoadTaskWaiters;
+
+ public ChunkLoadTask.EntityDataLoadTask getEntityDataLoadTask() {
+ return this.entityDataLoadTask;
+ }
+
+ // must hold schedule lock for the two below functions
+
+ // returns only if the data has been loaded from disk, DOES NOT relate to whether it has been deserialized
+ // or added into the world (or even into entityChunk)
+ public boolean isEntityChunkNBTLoaded() {
+ return (this.entityChunk != null && !this.entityChunk.isTransient()) || this.pendingEntityChunk != null;
+ }
+
+ private void completeEntityLoad(final GenericDataLoadTask.TaskResult<CompoundTag, Throwable> result) {
+ final List<GenericDataLoadTaskCallback> completeWaiters;
+ ChunkLoadTask.EntityDataLoadTask entityDataLoadTask = null;
+ boolean scheduleEntityTask = false;
+ this.scheduler.schedulingLock.lock();
+ try {
+ final List<GenericDataLoadTaskCallback> waiters = this.entityDataLoadTaskWaiters;
+ this.entityDataLoadTask = null;
+ if (result != null) {
+ this.entityDataLoadTaskWaiters = null;
+ this.pendingEntityChunk = result.left() == null ? EMPTY_ENTITY_CHUNK : result.left();
+ if (result.right() != null) {
+ LOGGER.error("Unhandled entity data load exception, data data will be lost: ", result.right());
+ }
+
+ completeWaiters = waiters;
+ } else {
+ // cancelled
+ completeWaiters = null;
+
+ // need to re-schedule?
+ if (waiters.isEmpty()) {
+ this.entityDataLoadTaskWaiters = null;
+ // no tasks to schedule _for_
+ } else {
+ entityDataLoadTask = this.entityDataLoadTask = new ChunkLoadTask.EntityDataLoadTask(
+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority()
+ );
+ entityDataLoadTask.addCallback(this::completeEntityLoad);
+ // need one schedule() per waiter
+ for (final GenericDataLoadTaskCallback callback : waiters) {
+ scheduleEntityTask |= entityDataLoadTask.schedule(true);
+ }
+ }
+ }
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+
+ if (scheduleEntityTask) {
+ entityDataLoadTask.scheduleNow();
+ }
+
+ // avoid holding the scheduling lock while completing
+ if (completeWaiters != null) {
+ for (final GenericDataLoadTaskCallback callback : completeWaiters) {
+ callback.accept(result);
+ }
+ }
+
+ this.scheduler.schedulingLock.lock();
+ try {
+ this.checkUnload();
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+ }
+
+ // note: it is guaranteed that the consumer cannot be called for the entirety that the schedule lock is held
+ // however, when the consumer is invoked, it will hold the schedule lock
+ public GenericDataLoadTaskCallback getOrLoadEntityData(final Consumer<GenericDataLoadTask.TaskResult<CompoundTag, Throwable>> consumer) {
+ if (this.isEntityChunkNBTLoaded()) {
+ throw new IllegalStateException("Cannot load entity data, it is already loaded");
+ }
+ // why not just acquire the lock? because the caller NEEDS to call isEntityChunkNBTLoaded before this!
+ if (!this.scheduler.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Must hold scheduling lock");
+ }
+
+ final GenericDataLoadTaskCallback ret = new EntityDataLoadTaskCallback((Consumer)consumer, this);
+
+ if (this.entityDataLoadTask == null) {
+ this.entityDataLoadTask = new ChunkLoadTask.EntityDataLoadTask(
+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority()
+ );
+ this.entityDataLoadTask.addCallback(this::completeEntityLoad);
+ this.entityDataLoadTaskWaiters = new ArrayList<>();
+ }
+ this.entityDataLoadTaskWaiters.add(ret);
+ if (this.entityDataLoadTask.schedule(true)) {
+ ret.schedule = this.entityDataLoadTask;
+ }
+ this.checkUnload();
+
+ return ret;
+ }
+
+ private static final class EntityDataLoadTaskCallback extends GenericDataLoadTaskCallback {
+
+ public EntityDataLoadTaskCallback(final Consumer<GenericDataLoadTask.TaskResult<?, Throwable>> consumer, final NewChunkHolder chunkHolder) {
+ super(consumer, chunkHolder);
+ }
+
+ @Override
+ void internalCancel() {
+ this.chunkHolder.entityDataLoadTaskWaiters.remove(this);
+ this.chunkHolder.entityDataLoadTask.cancel();
+ }
+ }
+
+ private PoiChunk poiChunk;
+
+ private ChunkLoadTask.PoiDataLoadTask poiDataLoadTask;
+ // note: if entityDataLoadTask is cancelled, but on its completion entityDataLoadTaskWaiters.size() != 0,
+ // then the task is rescheduled
+ private List<GenericDataLoadTaskCallback> poiDataLoadTaskWaiters;
+
+ public ChunkLoadTask.PoiDataLoadTask getPoiDataLoadTask() {
+ return this.poiDataLoadTask;
+ }
+
+ // must hold schedule lock for the two below functions
+
+ public boolean isPoiChunkLoaded() {
+ return this.poiChunk != null;
+ }
+
+ private void completePoiLoad(final GenericDataLoadTask.TaskResult<PoiChunk, Throwable> result) {
+ final List<GenericDataLoadTaskCallback> completeWaiters;
+ ChunkLoadTask.PoiDataLoadTask poiDataLoadTask = null;
+ boolean schedulePoiTask = false;
+ this.scheduler.schedulingLock.lock();
+ try {
+ final List<GenericDataLoadTaskCallback> waiters = this.poiDataLoadTaskWaiters;
+ this.poiDataLoadTask = null;
+ if (result != null) {
+ this.poiDataLoadTaskWaiters = null;
+ this.poiChunk = result.left();
+ if (result.right() != null) {
+ LOGGER.error("Unhandled poi load exception, poi data will be lost: ", result.right());
+ }
+
+ completeWaiters = waiters;
+ } else {
+ // cancelled
+ completeWaiters = null;
+
+ // need to re-schedule?
+ if (waiters.isEmpty()) {
+ this.poiDataLoadTaskWaiters = null;
+ // no tasks to schedule _for_
+ } else {
+ poiDataLoadTask = this.poiDataLoadTask = new ChunkLoadTask.PoiDataLoadTask(
+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority()
+ );
+ poiDataLoadTask.addCallback(this::completePoiLoad);
+ // need one schedule() per waiter
+ for (final GenericDataLoadTaskCallback callback : waiters) {
+ schedulePoiTask |= poiDataLoadTask.schedule(true);
+ }
+ }
+ }
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+
+ if (schedulePoiTask) {
+ poiDataLoadTask.scheduleNow();
+ }
+
+ // avoid holding the scheduling lock while completing
+ if (completeWaiters != null) {
+ for (final GenericDataLoadTaskCallback callback : completeWaiters) {
+ callback.accept(result);
+ }
+ }
+ this.scheduler.schedulingLock.lock();
+ try {
+ this.checkUnload();
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+ }
+
+ // note: it is guaranteed that the consumer cannot be called for the entirety that the schedule lock is held
+ // however, when the consumer is invoked, it will hold the schedule lock
+ public GenericDataLoadTaskCallback getOrLoadPoiData(final Consumer<GenericDataLoadTask.TaskResult<PoiChunk, Throwable>> consumer) {
+ if (this.isPoiChunkLoaded()) {
+ throw new IllegalStateException("Cannot load poi data, it is already loaded");
+ }
+ // why not just acquire the lock? because the caller NEEDS to call isPoiChunkLoaded before this!
+ if (!this.scheduler.schedulingLock.isHeldByCurrentThread()) {
+ throw new IllegalStateException("Must hold scheduling lock");
+ }
+
+ final GenericDataLoadTaskCallback ret = new PoiDataLoadTaskCallback((Consumer)consumer, this);
+
+ if (this.poiDataLoadTask == null) {
+ this.poiDataLoadTask = new ChunkLoadTask.PoiDataLoadTask(
+ this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority()
+ );
+ this.poiDataLoadTask.addCallback(this::completePoiLoad);
+ this.poiDataLoadTaskWaiters = new ArrayList<>();
+ }
+ this.poiDataLoadTaskWaiters.add(ret);
+ if (this.poiDataLoadTask.schedule(true)) {
+ ret.schedule = this.poiDataLoadTask;
+ }
+ this.checkUnload();
+
+ return ret;
+ }
+
+ private static final class PoiDataLoadTaskCallback extends GenericDataLoadTaskCallback {
+
+ public PoiDataLoadTaskCallback(final Consumer<GenericDataLoadTask.TaskResult<?, Throwable>> consumer, final NewChunkHolder chunkHolder) {
+ super(consumer, chunkHolder);
+ }
+
+ @Override
+ void internalCancel() {
+ this.chunkHolder.poiDataLoadTaskWaiters.remove(this);
+ this.chunkHolder.poiDataLoadTask.cancel();
+ }
+ }
+
+ public static abstract class GenericDataLoadTaskCallback implements Cancellable, Consumer<GenericDataLoadTask.TaskResult<?, Throwable>> {
+
+ protected final Consumer<GenericDataLoadTask.TaskResult<?, Throwable>> consumer;
+ protected final NewChunkHolder chunkHolder;
+ protected boolean completed;
+ protected GenericDataLoadTask<?, ?> schedule;
+ protected final AtomicBoolean scheduled = new AtomicBoolean();
+
+ public GenericDataLoadTaskCallback(final Consumer<GenericDataLoadTask.TaskResult<?, Throwable>> consumer,
+ final NewChunkHolder chunkHolder) {
+ this.consumer = consumer;
+ this.chunkHolder = chunkHolder;
+ }
+
+ public void schedule() {
+ if (this.scheduled.getAndSet(true)) {
+ throw new IllegalStateException("Double calling schedule()");
+ }
+ if (this.schedule != null) {
+ this.schedule.scheduleNow();
+ this.schedule = null;
+ }
+ }
+
+ boolean isCompleted() {
+ return this.completed;
+ }
+
+ // must hold scheduling lock
+ private boolean setCompleted() {
+ if (this.completed) {
+ return false;
+ }
+ return this.completed = true;
+ }
+
+ @Override
+ public void accept(final GenericDataLoadTask.TaskResult<?, Throwable> result) {
+ if (result != null) {
+ if (this.setCompleted()) {
+ this.consumer.accept(result);
+ } else {
+ throw new IllegalStateException("Cannot be cancelled at this point");
+ }
+ } else {
+ throw new NullPointerException("Result cannot be null (cancelled)");
+ }
+ }
+
+ // holds scheduling lock
+ abstract void internalCancel();
+
+ @Override
+ public boolean cancel() {
+ this.chunkHolder.scheduler.schedulingLock.lock();
+ try {
+ if (!this.completed) {
+ this.completed = true;
+ this.internalCancel();
+ return true;
+ }
+ return false;
+ } finally {
+ this.chunkHolder.scheduler.schedulingLock.unlock();
+ }
+ }
+ }
+
+ private ChunkAccess currentChunk;
+
+ // generation status state
+
+ /**
+ * Current status the chunk has been brought up to by the chunk system. null indicates no work at all
+ */
+ private ChunkStatus currentGenStatus;
+
+ // This allows unsynchronised access to the chunk and last gen status
+ private volatile ChunkCompletion lastChunkCompletion;
+
+ public ChunkCompletion getLastChunkCompletion() {
+ return this.lastChunkCompletion;
+ }
+
+ public static final record ChunkCompletion(ChunkAccess chunk, ChunkStatus genStatus) {};
+
+ /**
+ * The target final chunk status the chunk system will bring the chunk to.
+ */
+ private ChunkStatus requestedGenStatus;
+
+ private ChunkProgressionTask generationTask;
+ private ChunkStatus generationTaskStatus;
+
+ /**
+ * contains the neighbours that this chunk generation is blocking on
+ */
+ protected final ReferenceLinkedOpenHashSet<NewChunkHolder> neighboursBlockingGenTask = new ReferenceLinkedOpenHashSet<>(4);
+
+ /**
+ * map of ChunkHolder -> Required Status for this chunk
+ */
+ protected final Reference2ObjectLinkedOpenHashMap<NewChunkHolder, ChunkStatus> neighboursWaitingForUs = new Reference2ObjectLinkedOpenHashMap<>();
+
+ public void addGenerationBlockingNeighbour(final NewChunkHolder neighbour) {
+ this.neighboursBlockingGenTask.add(neighbour);
+ }
+
+ public void addWaitingNeighbour(final NewChunkHolder neighbour, final ChunkStatus requiredStatus) {
+ final boolean wasEmpty = this.neighboursWaitingForUs.isEmpty();
+ this.neighboursWaitingForUs.put(neighbour, requiredStatus);
+ if (wasEmpty) {
+ this.checkUnload();
+ }
+ }
+
+ // priority state
+
+ // the target priority for this chunk to generate at
+ // TODO this will screw over scheduling at lower priorities to neighbours, fix
+ private PrioritisedExecutor.Priority priority = PrioritisedExecutor.Priority.NORMAL;
+ private boolean priorityLocked;
+
+ // the priority neighbouring chunks have requested this chunk generate at
+ private PrioritisedExecutor.Priority neighbourRequestedPriority = PrioritisedExecutor.Priority.IDLE;
+
+ public PrioritisedExecutor.Priority getEffectivePriority() {
+ return PrioritisedExecutor.Priority.max(this.priority, this.neighbourRequestedPriority);
+ }
+
+ protected void recalculateNeighbourRequestedPriority() {
+ if (this.neighboursWaitingForUs.isEmpty()) {
+ this.neighbourRequestedPriority = PrioritisedExecutor.Priority.IDLE;
+ return;
+ }
+
+ PrioritisedExecutor.Priority max = PrioritisedExecutor.Priority.IDLE;
+
+ for (final NewChunkHolder holder : this.neighboursWaitingForUs.keySet()) {
+ final PrioritisedExecutor.Priority neighbourPriority = holder.getEffectivePriority();
+ if (neighbourPriority.isHigherPriority(max)) {
+ max = neighbourPriority;
+ }
+ }
+
+ final PrioritisedExecutor.Priority current = this.getEffectivePriority();
+ this.neighbourRequestedPriority = max;
+ final PrioritisedExecutor.Priority next = this.getEffectivePriority();
+
+ if (current == next) {
+ return;
+ }
+
+ // our effective priority has changed, so change our task
+ if (this.generationTask != null) {
+ this.generationTask.setPriority(next);
+ }
+
+ // now propagate this to our neighbours
+ this.recalculateNeighbourPriorities();
+ }
+
+ public void recalculateNeighbourPriorities() {
+ for (final NewChunkHolder holder : this.neighboursBlockingGenTask) {
+ holder.recalculateNeighbourRequestedPriority();
+ }
+ }
+
+ // must hold scheduling lock
+ public void raisePriority(final PrioritisedExecutor.Priority priority) {
+ if (this.priority != null && this.priority.isHigherOrEqualPriority(priority)) {
+ return;
+ }
+ this.setPriority(priority);
+ }
+
+ private void lockPriority() {
+ this.priority = PrioritisedExecutor.Priority.NORMAL;
+ this.priorityLocked = true;
+ }
+
+ // must hold scheduling lock
+ public void setPriority(final PrioritisedExecutor.Priority priority) {
+ if (this.priorityLocked) {
+ return;
+ }
+ final PrioritisedExecutor.Priority old = this.getEffectivePriority();
+ this.priority = priority;
+ final PrioritisedExecutor.Priority newPriority = this.getEffectivePriority();
+
+ if (old != newPriority) {
+ if (this.generationTask != null) {
+ this.generationTask.setPriority(newPriority);
+ }
+ }
+
+ this.recalculateNeighbourPriorities();
+ }
+
+ // must hold scheduling lock
+ public void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ if (this.priority != null && this.priority.isLowerOrEqualPriority(priority)) {
+ return;
+ }
+ this.setPriority(priority);
+ }
+
+ // error handling state
+ private ChunkStatus failedGenStatus;
+ private Throwable genTaskException;
+ private Thread genTaskFailedThread;
+
+ private boolean failedLightUpdate;
+
+ public void failedLightUpdate() {
+ this.failedLightUpdate = true;
+ }
+
+ public boolean hasFailedGeneration() {
+ return this.genTaskException != null;
+ }
+
+ // ticket level state
+ private int oldTicketLevel = ChunkMap.MAX_CHUNK_DISTANCE + 1;
+ private int currentTicketLevel = ChunkMap.MAX_CHUNK_DISTANCE + 1;
+
+ public int getTicketLevel() {
+ return this.currentTicketLevel;
+ }
+
+ public final ChunkHolder vanillaChunkHolder;
+
+ public NewChunkHolder(final ServerLevel world, final int chunkX, final int chunkZ, final ChunkTaskScheduler scheduler) {
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.scheduler = scheduler;
+ this.vanillaChunkHolder = new ChunkHolder(new ChunkPos(chunkX, chunkZ), world, world.getLightEngine(), world.chunkSource.chunkMap, this);
+ }
+
+ protected ImposterProtoChunk wrappedChunkForNeighbour;
+
+ // holds scheduling lock
+ public ChunkAccess getChunkForNeighbourAccess() {
+ // Vanilla overrides the status futures with an imposter chunk to prevent writes to full chunks
+ // But we don't store per-status futures, so we need this hack
+ if (this.wrappedChunkForNeighbour != null) {
+ return this.wrappedChunkForNeighbour;
+ }
+ final ChunkAccess ret = this.currentChunk;
+ return ret instanceof LevelChunk fullChunk ? this.wrappedChunkForNeighbour = new ImposterProtoChunk(fullChunk, false) : ret;
+ }
+
+ public ChunkAccess getCurrentChunk() {
+ return this.currentChunk;
+ }
+
+ int getCurrentTicketLevel() {
+ return this.currentTicketLevel;
+ }
+
+ void updateTicketLevel(final int toLevel) {
+ this.currentTicketLevel = toLevel;
+ }
+
+ private int totalNeighboursUsingThisChunk = 0;
+
+ // holds schedule lock
+ public void addNeighbourUsingChunk() {
+ final int now = ++this.totalNeighboursUsingThisChunk;
+
+ if (now == 1) {
+ this.checkUnload();
+ }
+ }
+
+ // holds schedule lock
+ public void removeNeighbourUsingChunk() {
+ final int now = --this.totalNeighboursUsingThisChunk;
+
+ if (now == 0) {
+ this.checkUnload();
+ }
+
+ if (now < 0) {
+ throw new IllegalStateException("Neighbours using this chunk cannot be negative");
+ }
+ }
+
+ // must hold scheduling lock
+ // returns string reason for why chunk should remain loaded, null otherwise
+ public final String isSafeToUnload() {
+ // is ticket level below threshold?
+ if (this.oldTicketLevel <= ChunkHolderManager.MAX_TICKET_LEVEL) {
+ return "ticket_level";
+ }
+
+ // are we being used by another chunk for generation?
+ if (this.totalNeighboursUsingThisChunk != 0) {
+ return "neighbours_generating";
+ }
+
+ // are we going to be used by another chunk for generation?
+ if (!this.neighboursWaitingForUs.isEmpty()) {
+ return "neighbours_waiting";
+ }
+
+ // chunk must be marked inaccessible (i.e unloaded to plugins)
+ if (this.getChunkStatus() != ChunkHolder.FullChunkStatus.INACCESSIBLE) {
+ return "fullchunkstatus";
+ }
+
+ // are we currently generating anything, or have requested generation?
+ if (this.generationTask != null) {
+ return "generating";
+ }
+ if (this.requestedGenStatus != null) {
+ return "requested_generation";
+ }
+
+ // entity data requested?
+ if (this.entityDataLoadTask != null) {
+ return "entity_data_requested";
+ }
+
+ // poi data requested?
+ if (this.poiDataLoadTask != null) {
+ return "poi_data_requested";
+ }
+
+ // are we pending serialization?
+ if (this.entityDataUnload != null) {
+ return "entity_serialization";
+ }
+ if (this.poiDataUnload != null) {
+ return "poi_serialization";
+ }
+ if (this.chunkDataUnload != null) {
+ return "chunk_serialization";
+ }
+
+ // Note: light tasks do not need a check, as they add a ticket.
+
+ // nothing is using this chunk, so it should be unloaded
+ return null;
+ }
+
+ /** Unloaded from chunk map */
+ boolean killed;
+
+ // must hold scheduling lock
+ private void checkUnload() {
+ if (this.killed) {
+ return;
+ }
+ if (this.isSafeToUnload() == null) {
+ // ensure in unload queue
+ this.scheduler.chunkHolderManager.unloadQueue.add(this);
+ } else {
+ // ensure not in unload queue
+ this.scheduler.chunkHolderManager.unloadQueue.remove(this);
+ }
+ }
+
+ static final record UnloadState(NewChunkHolder holder, ChunkAccess chunk, ChunkEntitySlices entityChunk, PoiChunk poiChunk) {};
+
+ // note: these are completed with null to indicate that no write occurred
+ // they are also completed with null to indicate a null write occurred
+ private UnloadTask chunkDataUnload;
+ private UnloadTask entityDataUnload;
+ private UnloadTask poiDataUnload;
+
+ public static final record UnloadTask(Completable<CompoundTag> completable, DelayedPrioritisedTask task) {}
+
+ public UnloadTask getUnloadTask(final RegionFileIOThread.RegionFileType type) {
+ switch (type) {
+ case CHUNK_DATA:
+ return this.chunkDataUnload;
+ case ENTITY_DATA:
+ return this.entityDataUnload;
+ case POI_DATA:
+ return this.poiDataUnload;
+ default:
+ throw new IllegalStateException("Unknown regionfile type " + type);
+ }
+ }
+
+ private UnloadState unloadState;
+
+ // holds schedule lock
+ UnloadState unloadStage1() {
+ // because we hold the scheduling lock, we cannot actually unload anything
+ // so we need to null this chunk's state
+ ChunkAccess chunk = this.currentChunk;
+ ChunkEntitySlices entityChunk = this.entityChunk;
+ PoiChunk poiChunk = this.poiChunk;
+ // chunk state
+ this.currentChunk = null;
+ this.currentGenStatus = null;
+ this.wrappedChunkForNeighbour = null;
+ this.lastChunkCompletion = null;
+ // entity chunk state
+ this.entityChunk = null;
+ this.pendingEntityChunk = null;
+
+ // poi chunk state
+ this.poiChunk = null;
+
+ // priority state
+ this.priorityLocked = false;
+
+ if (chunk != null) {
+ this.chunkDataUnload = new UnloadTask(new Completable<>(), new DelayedPrioritisedTask(PrioritisedExecutor.Priority.NORMAL));
+ }
+ if (poiChunk != null) {
+ this.poiDataUnload = new UnloadTask(new Completable<>(), null);
+ }
+ if (entityChunk != null) {
+ this.entityDataUnload = new UnloadTask(new Completable<>(), null);
+ }
+
+ return this.unloadState = (chunk != null || entityChunk != null || poiChunk != null) ? new UnloadState(this, chunk, entityChunk, poiChunk) : null;
+ }
+
+ // data is null if failed or does not need to be saved
+ void completeAsyncChunkDataSave(final CompoundTag data) {
+ if (data != null) {
+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, data, RegionFileIOThread.RegionFileType.CHUNK_DATA);
+ }
+ this.chunkDataUnload.completable().complete(data);
+ this.scheduler.schedulingLock.lock();
+ try {
+ // can only write to these fields while holding the schedule lock
+ this.chunkDataUnload = null;
+ this.checkUnload();
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+ }
+
+ void unloadStage2(final UnloadState state) {
+ this.unloadState = null;
+ final ChunkAccess chunk = state.chunk();
+ final ChunkEntitySlices entityChunk = state.entityChunk();
+ final PoiChunk poiChunk = state.poiChunk();
+
+ final boolean shouldLevelChunkNotSave = (chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave);
+
+ // unload chunk data
+ if (chunk != null) {
+ if (chunk instanceof LevelChunk levelChunk) {
+ levelChunk.setLoaded(false);
+ }
+
+ if (!shouldLevelChunkNotSave) {
+ this.saveChunk(chunk, true);
+ } else {
+ this.completeAsyncChunkDataSave(null);
+ }
+
+ if (chunk instanceof LevelChunk levelChunk) {
+ this.world.unload(levelChunk);
+ }
+ }
+
+ // unload entity data
+ if (entityChunk != null) {
+ this.saveEntities(entityChunk, true);
+ // yes this is a hack to pass the compound tag through...
+ final CompoundTag lastEntityUnload = this.lastEntityUnload;
+ this.lastEntityUnload = null;
+
+ if (entityChunk.unload()) {
+ this.scheduler.schedulingLock.lock();
+ try {
+ entityChunk.setTransient(true);
+ this.entityChunk = entityChunk;
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+ } else {
+ this.world.getEntityLookup().entitySectionUnload(this.chunkX, this.chunkZ);
+ }
+ // we need to delay the callback until after determining transience, otherwise a potential loader could
+ // set entityChunk before we do
+ this.entityDataUnload.completable().complete(lastEntityUnload);
+ }
+
+ // unload poi data
+ if (poiChunk != null) {
+ if (poiChunk.isDirty() && !shouldLevelChunkNotSave) {
+ this.savePOI(poiChunk, true);
+ } else {
+ this.poiDataUnload.completable().complete(null);
+ }
+
+ if (poiChunk.isLoaded()) {
+ this.world.getPoiManager().onUnload(CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ));
+ }
+ }
+ }
+
+ boolean unloadStage3() {
+ // can only write to these while holding the schedule lock, and we instantly complete them in stage2
+ this.poiDataUnload = null;
+ this.entityDataUnload = null;
+
+ // we need to check if anything has been loaded in the meantime (or if we have transient entities)
+ if (this.entityChunk != null || this.poiChunk != null || this.currentChunk != null) {
+ return false;
+ }
+
+ return this.isSafeToUnload() == null;
+ }
+
+ private void cancelGenTask() {
+ if (this.generationTask != null) {
+ this.generationTask.cancel();
+ } else {
+ // otherwise, we are blocking on neighbours, so remove them
+ if (!this.neighboursBlockingGenTask.isEmpty()) {
+ for (final NewChunkHolder neighbour : this.neighboursBlockingGenTask) {
+ if (neighbour.neighboursWaitingForUs.remove(this) == null) {
+ throw new IllegalStateException("Corrupt state");
+ }
+ if (neighbour.neighboursWaitingForUs.isEmpty()) {
+ neighbour.checkUnload();
+ }
+ }
+ this.neighboursBlockingGenTask.clear();
+ this.checkUnload();
+ }
+ }
+ }
+
+ // holds: ticket level update lock
+ // holds: schedule lock
+ public void processTicketLevelUpdate(final List<ChunkProgressionTask> scheduledTasks, final List<NewChunkHolder> changedLoadStatus) {
+ final int oldLevel = this.oldTicketLevel;
+ final int newLevel = this.currentTicketLevel;
+
+ if (oldLevel == newLevel) {
+ return;
+ }
+
+ this.oldTicketLevel = newLevel;
+
+ final ChunkHolder.FullChunkStatus oldState = ChunkHolder.getFullChunkStatus(oldLevel);
+ final ChunkHolder.FullChunkStatus newState = ChunkHolder.getFullChunkStatus(newLevel);
+ final boolean oldUnloaded = oldLevel > ChunkHolderManager.MAX_TICKET_LEVEL;
+ final boolean newUnloaded = newLevel > ChunkHolderManager.MAX_TICKET_LEVEL;
+
+ final ChunkStatus maxGenerationStatusOld = ChunkHolder.getStatus(oldLevel);
+ final ChunkStatus maxGenerationStatusNew = ChunkHolder.getStatus(newLevel);
+
+ // check for cancellations from downgrading ticket level
+ if (this.requestedGenStatus != null && !newState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && newLevel > oldLevel) {
+ // note: cancel() may invoke onChunkGenComplete synchronously here
+ if (newUnloaded) {
+ // need to cancel all tasks
+ // note: requested status must be set to null here before cancellation, to indicate to the
+ // completion logic that we do not want rescheduling to occur
+ this.requestedGenStatus = null;
+ this.cancelGenTask();
+ } else {
+ final ChunkStatus toCancel = maxGenerationStatusNew.getNextStatus();
+ final ChunkStatus currentRequestedStatus = this.requestedGenStatus;
+
+ if (currentRequestedStatus.isOrAfter(toCancel)) {
+ // we do have to cancel something here
+ // clamp requested status to the maximum
+ if (this.currentGenStatus != null && this.currentGenStatus.isOrAfter(maxGenerationStatusNew)) {
+ // already generated to status, so we must cancel
+ this.requestedGenStatus = null;
+ this.cancelGenTask();
+ } else {
+ // not generated to status, so we may have to cancel
+ // note: gen task is always 1 status above current gen status if not null
+ this.requestedGenStatus = maxGenerationStatusNew;
+ if (this.generationTaskStatus != null && this.generationTaskStatus.isOrAfter(toCancel)) {
+ // TOOD is this even possible? i don't think so
+ throw new IllegalStateException("?????");
+ }
+ }
+ }
+ }
+ }
+
+ if (newState != oldState) {
+ if (newState.isOrAfter(oldState)) {
+ // status upgrade
+ if (!oldState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && newState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ // may need to schedule full load
+ if (this.currentGenStatus != ChunkStatus.FULL) {
+ if (this.requestedGenStatus != null) {
+ this.requestedGenStatus = ChunkStatus.FULL;
+ } else {
+ this.scheduler.schedule(
+ this.chunkX, this.chunkZ, ChunkStatus.FULL, this, scheduledTasks
+ );
+ }
+ } else {
+ // now we are fully loaded
+ this.queueBorderFullStatus(true, changedLoadStatus);
+ }
+ }
+ } else {
+ // status downgrade
+ if (!newState.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING) && oldState.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING)) {
+ this.completeFullStatusConsumers(ChunkHolder.FullChunkStatus.ENTITY_TICKING, null);
+ }
+
+ if (!newState.isOrAfter(ChunkHolder.FullChunkStatus.TICKING) && oldState.isOrAfter(ChunkHolder.FullChunkStatus.TICKING)) {
+ this.completeFullStatusConsumers(ChunkHolder.FullChunkStatus.TICKING, null);
+ }
+
+ if (!newState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && oldState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ this.completeFullStatusConsumers(ChunkHolder.FullChunkStatus.BORDER, null);
+ }
+ }
+ }
+
+ if (oldState != newState) {
+ if (this.onTicketUpdate(oldState, newState)) {
+ changedLoadStatus.add(this);
+ }
+ }
+
+ if (oldUnloaded != newUnloaded) {
+ this.checkUnload();
+ }
+ }
+
+ /*
+ For full chunks, vanilla just loads chunks around it up to FEATURES, 1 radius
+
+ For ticking chunks, it updates the persistent entity manager (soon to be completely nuked by EntitySliceManager, which
+ will also need to be updated but with far less implications)
+ It also shoves the scheduled block ticks into the tick scheduler
+
+ For entity ticking chunks, updates the entity manager (see above)
+ */
+
+ static final int NEIGHBOUR_RADIUS = 2;
+ private long fullNeighbourChunksLoadedBitset;
+
+ private static int getFullNeighbourIndex(final int relativeX, final int relativeZ) {
+ // index = (relativeX + NEIGHBOUR_CACHE_RADIUS) + (relativeZ + NEIGHBOUR_CACHE_RADIUS) * (NEIGHBOUR_CACHE_RADIUS * 2 + 1)
+ // optimised variant of the above by moving some of the ops to compile time
+ return relativeX + (relativeZ * (NEIGHBOUR_RADIUS * 2 + 1)) + (NEIGHBOUR_RADIUS + NEIGHBOUR_RADIUS * ((NEIGHBOUR_RADIUS * 2 + 1)));
+ }
+ public final boolean isNeighbourFullLoaded(final int relativeX, final int relativeZ) {
+ return (this.fullNeighbourChunksLoadedBitset & (1L << getFullNeighbourIndex(relativeX, relativeZ))) != 0;
+ }
+
+ // returns true if this chunk changed full status
+ public final boolean setNeighbourFullLoaded(final int relativeX, final int relativeZ) {
+ final long before = this.fullNeighbourChunksLoadedBitset;
+ final int index = getFullNeighbourIndex(relativeX, relativeZ);
+ this.fullNeighbourChunksLoadedBitset |= (1L << index);
+ return this.onNeighbourChange(before, this.fullNeighbourChunksLoadedBitset);
+ }
+
+ // returns true if this chunk changed full status
+ public final boolean setNeighbourFullUnloaded(final int relativeX, final int relativeZ) {
+ final long before = this.fullNeighbourChunksLoadedBitset;
+ final int index = getFullNeighbourIndex(relativeX, relativeZ);
+ this.fullNeighbourChunksLoadedBitset &= ~(1L << index);
+ return this.onNeighbourChange(before, this.fullNeighbourChunksLoadedBitset);
+ }
+
+ public static boolean areNeighboursFullLoaded(final long bitset, final int radius) {
+ // index = relativeX + (relativeZ * (NEIGHBOUR_CACHE_RADIUS * 2 + 1)) + (NEIGHBOUR_CACHE_RADIUS + NEIGHBOUR_CACHE_RADIUS * ((NEIGHBOUR_CACHE_RADIUS * 2 + 1)))
+ switch (radius) {
+ case 0: {
+ return (bitset & (1L << getFullNeighbourIndex(0, 0))) != 0L;
+ }
+ case 1: {
+ long mask = 0L;
+ for (int dx = -1; dx <= 1; ++dx) {
+ for (int dz = -1; dz <= 1; ++dz) {
+ mask |= (1L << getFullNeighbourIndex(dx, dz));
+ }
+ }
+ return (bitset & mask) == mask;
+ }
+ case 2: {
+ long mask = 0L;
+ for (int dx = -2; dx <= 2; ++dx) {
+ for (int dz = -2; dz <= 2; ++dz) {
+ mask |= (1L << getFullNeighbourIndex(dx, dz));
+ }
+ }
+ return (bitset & mask) == mask;
+ }
+
+ default: {
+ throw new IllegalArgumentException("Radius not recognized: " + radius);
+ }
+ }
+ }
+
+ // upper 16 bits are pending status, lower 16 bits are current status
+ private volatile long chunkStatus;
+ private static final long PENDING_STATUS_MASK = Long.MIN_VALUE >> 31;
+ private static final ChunkHolder.FullChunkStatus[] CHUNK_STATUS_BY_ID = ChunkHolder.FullChunkStatus.values();
+ private static final VarHandle CHUNK_STATUS_HANDLE = ConcurrentUtil.getVarHandle(NewChunkHolder.class, "chunkStatus", long.class);
+
+ public static ChunkHolder.FullChunkStatus getCurrentChunkStatus(final long encoded) {
+ return CHUNK_STATUS_BY_ID[(int)encoded];
+ }
+
+ public static ChunkHolder.FullChunkStatus getPendingChunkStatus(final long encoded) {
+ return CHUNK_STATUS_BY_ID[(int)(encoded >>> 32)];
+ }
+
+ public ChunkHolder.FullChunkStatus getChunkStatus() {
+ return getCurrentChunkStatus(((long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this)));
+ }
+
+ public boolean isEntityTickingReady() {
+ return this.getChunkStatus().isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING);
+ }
+
+ public boolean isTickingReady() {
+ return this.getChunkStatus().isOrAfter(ChunkHolder.FullChunkStatus.TICKING);
+ }
+
+ public boolean isFullChunkReady() {
+ return this.getChunkStatus().isOrAfter(ChunkHolder.FullChunkStatus.BORDER);
+ }
+
+ private static ChunkHolder.FullChunkStatus getStatusForBitset(final long bitset) {
+ if (areNeighboursFullLoaded(bitset, 2)) {
+ return ChunkHolder.FullChunkStatus.ENTITY_TICKING;
+ } else if (areNeighboursFullLoaded(bitset, 1)) {
+ return ChunkHolder.FullChunkStatus.TICKING;
+ } else if (areNeighboursFullLoaded(bitset, 0)) {
+ return ChunkHolder.FullChunkStatus.BORDER;
+ } else {
+ return ChunkHolder.FullChunkStatus.INACCESSIBLE;
+ }
+ }
+
+ // note: only while updating ticket level, so holds ticket update lock + scheduling lock
+ protected final boolean onTicketUpdate(final ChunkHolder.FullChunkStatus oldState, final ChunkHolder.FullChunkStatus newState) {
+ if (oldState == newState) {
+ return false;
+ }
+
+ // preserve border request after full status complete, as it does not set anything in the bitset
+ ChunkHolder.FullChunkStatus byNeighbours = getStatusForBitset(this.fullNeighbourChunksLoadedBitset);
+ if (byNeighbours == ChunkHolder.FullChunkStatus.INACCESSIBLE && newState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && this.currentGenStatus == ChunkStatus.FULL) {
+ byNeighbours = ChunkHolder.FullChunkStatus.BORDER;
+ }
+
+ final ChunkHolder.FullChunkStatus toSet;
+
+ if (newState.isOrAfter(byNeighbours)) {
+ // must clamp to neighbours level, even though we have the ticket level
+ toSet = byNeighbours;
+ } else {
+ // must clamp to ticket level, even though we have the neighbours
+ toSet = newState;
+ }
+
+ long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);
+
+ if (curr == ((long)toSet.ordinal() | ((long)toSet.ordinal() << 32))) {
+ // nothing to do
+ return false;
+ }
+
+ int failures = 0;
+ for (;;) {
+ final long update = (curr & ~PENDING_STATUS_MASK) | ((long)toSet.ordinal() << 32);
+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) {
+ return true;
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ protected final boolean onNeighbourChange(final long bitsetBefore, final long bitsetAfter) {
+ ChunkHolder.FullChunkStatus oldState = getStatusForBitset(bitsetBefore);
+ ChunkHolder.FullChunkStatus newState = getStatusForBitset(bitsetAfter);
+ final ChunkHolder.FullChunkStatus currStateTicketLevel = ChunkHolder.getFullChunkStatus(this.oldTicketLevel);
+ if (oldState.isOrAfter(currStateTicketLevel)) {
+ oldState = currStateTicketLevel;
+ }
+ if (newState.isOrAfter(currStateTicketLevel)) {
+ newState = currStateTicketLevel;
+ }
+ // preserve border request after full status complete, as it does not set anything in the bitset
+ if (newState == ChunkHolder.FullChunkStatus.INACCESSIBLE && currStateTicketLevel.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && this.currentGenStatus == ChunkStatus.FULL) {
+ newState = ChunkHolder.FullChunkStatus.BORDER;
+ }
+
+ if (oldState == newState) {
+ return false;
+ }
+
+ int failures = 0;
+ for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) {
+ final long update = (curr & ~PENDING_STATUS_MASK) | ((long)newState.ordinal() << 32);
+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) {
+ return true;
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ private boolean queueBorderFullStatus(final boolean loaded, final List<NewChunkHolder> changedFullStatus) {
+ final ChunkHolder.FullChunkStatus toStatus = loaded ? ChunkHolder.FullChunkStatus.BORDER : ChunkHolder.FullChunkStatus.INACCESSIBLE;
+
+ int failures = 0;
+ for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) {
+ final ChunkHolder.FullChunkStatus currPending = getPendingChunkStatus(curr);
+ if (loaded && currPending != ChunkHolder.FullChunkStatus.INACCESSIBLE) {
+ throw new IllegalStateException("Expected " + ChunkHolder.FullChunkStatus.INACCESSIBLE + " for pending, but got " + currPending);
+ }
+
+ final long update = (curr & ~PENDING_STATUS_MASK) | ((long)toStatus.ordinal() << 32);
+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) {
+ if ((int)(update) != (int)(update >>> 32)) {
+ changedFullStatus.add(this);
+ return true;
+ }
+ return false;
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ // only call on main thread, must hold ticket level and scheduling lock
+ private void onFullChunkLoadChange(final boolean loaded, final List<NewChunkHolder> changedFullStatus) {
+ for (int dz = -NEIGHBOUR_RADIUS; dz <= NEIGHBOUR_RADIUS; ++dz) {
+ for (int dx = -NEIGHBOUR_RADIUS; dx <= NEIGHBOUR_RADIUS; ++dx) {
+ final NewChunkHolder holder = (dx | dz) == 0 ? this : this.scheduler.chunkHolderManager.getChunkHolder(dx + this.chunkX, dz + this.chunkZ);
+ if (loaded) {
+ if (holder.setNeighbourFullLoaded(-dx, -dz)) {
+ changedFullStatus.add(holder);
+ }
+ } else {
+ if (holder != null && holder.setNeighbourFullUnloaded(-dx, -dz)) {
+ changedFullStatus.add(holder);
+ }
+ }
+ }
+ }
+ }
+
+ private ChunkHolder.FullChunkStatus updateCurrentState(final ChunkHolder.FullChunkStatus to) {
+ int failures = 0;
+ for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) {
+ final long update = (curr & PENDING_STATUS_MASK) | (long)to.ordinal();
+ if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) {
+ return getPendingChunkStatus(curr);
+ }
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ private void changeEntityChunkStatus(final ChunkHolder.FullChunkStatus toStatus) {
+ this.world.getEntityLookup().chunkStatusChange(this.chunkX, this.chunkZ, toStatus);
+ }
+
+ private boolean processingFullStatus = false;
+
+ // only to be called on the main thread, no locks need to be held
+ public boolean handleFullStatusChange(final List<NewChunkHolder> changedFullStatus) {
+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot update full status thread off-main");
+
+ boolean ret = false;
+
+ if (this.processingFullStatus) {
+ // we cannot process updates recursively
+ return ret;
+ }
+
+ // note: use opaque reads for chunk status read since we need it to be atomic
+
+ // test if anything changed
+ final long statusCheck = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this);
+ if ((int)statusCheck == (int)(statusCheck >>> 32)) {
+ // nothing changed
+ return ret;
+ }
+
+ final ChunkTaskScheduler scheduler = this.scheduler;
+ final ChunkHolderManager holderManager = scheduler.chunkHolderManager;
+ final int ticketKeep;
+ final Long ticketId;
+ holderManager.ticketLock.lock();
+ try {
+ ticketKeep = this.currentTicketLevel;
+ ticketId = Long.valueOf(holderManager.getNextStatusUpgradeId());
+ holderManager.addTicketAtLevel(TicketType.STATUS_UPGRADE, this.chunkX, this.chunkZ, ticketKeep, ticketId);
+ } finally {
+ holderManager.ticketLock.unlock();
+ }
+
+ this.processingFullStatus = true;
+ try {
+ for (;;) {
+ final long currStateEncoded = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this);
+ final ChunkHolder.FullChunkStatus currState = getCurrentChunkStatus(currStateEncoded);
+ ChunkHolder.FullChunkStatus nextState = getPendingChunkStatus(currStateEncoded);
+ if (currState == nextState) {
+ if (nextState == ChunkHolder.FullChunkStatus.INACCESSIBLE) {
+ this.scheduler.schedulingLock.lock();
+ try {
+ this.checkUnload();
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+ }
+ break;
+ }
+
+ // chunks cannot downgrade state while status is pending a change
+ final LevelChunk chunk = (LevelChunk)this.currentChunk;
+
+ // Note: we assume that only load/unload contain plugin logic
+ // plugin logic is anything stupid enough to possibly change the chunk status while it is already
+ // being changed (i.e during load it is possible it will try to set to full ticking)
+ // in order to allow this change, we also need this plugin logic to be contained strictly after all
+ // of the chunk system load callbacks are invoked
+ if (nextState.isOrAfter(currState)) {
+ // state upgrade
+ if (!currState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && nextState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ nextState = this.updateCurrentState(ChunkHolder.FullChunkStatus.BORDER);
+ holderManager.ensureInAutosave(this);
+ chunk.pushChunkIntoLoadedMap();
+ this.changeEntityChunkStatus(ChunkHolder.FullChunkStatus.BORDER);
+ chunk.onChunkLoad(this);
+ this.onFullChunkLoadChange(true, changedFullStatus);
+ this.completeFullStatusConsumers(ChunkHolder.FullChunkStatus.BORDER, chunk);
+ }
+
+ if (!currState.isOrAfter(ChunkHolder.FullChunkStatus.TICKING) && nextState.isOrAfter(ChunkHolder.FullChunkStatus.TICKING)) {
+ nextState = this.updateCurrentState(ChunkHolder.FullChunkStatus.TICKING);
+ this.changeEntityChunkStatus(ChunkHolder.FullChunkStatus.TICKING);
+ chunk.onChunkTicking(this);
+ this.completeFullStatusConsumers(ChunkHolder.FullChunkStatus.TICKING, chunk);
+ }
+
+ if (!currState.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING) && nextState.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING)) {
+ nextState = this.updateCurrentState(ChunkHolder.FullChunkStatus.ENTITY_TICKING);
+ this.changeEntityChunkStatus(ChunkHolder.FullChunkStatus.ENTITY_TICKING);
+ chunk.onChunkEntityTicking(this);
+ this.completeFullStatusConsumers(ChunkHolder.FullChunkStatus.ENTITY_TICKING, chunk);
+ }
+ } else {
+ if (currState.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING) && !nextState.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING)) {
+ this.changeEntityChunkStatus(ChunkHolder.FullChunkStatus.TICKING);
+ chunk.onChunkNotEntityTicking(this);
+ nextState = this.updateCurrentState(ChunkHolder.FullChunkStatus.TICKING);
+ }
+
+ if (currState.isOrAfter(ChunkHolder.FullChunkStatus.TICKING) && !nextState.isOrAfter(ChunkHolder.FullChunkStatus.TICKING)) {
+ this.changeEntityChunkStatus(ChunkHolder.FullChunkStatus.BORDER);
+ chunk.onChunkNotTicking(this);
+ nextState = this.updateCurrentState(ChunkHolder.FullChunkStatus.BORDER);
+ }
+
+ if (currState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && !nextState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ this.onFullChunkLoadChange(false, changedFullStatus);
+ this.changeEntityChunkStatus(ChunkHolder.FullChunkStatus.INACCESSIBLE);
+ chunk.onChunkUnload(this);
+ nextState = this.updateCurrentState(ChunkHolder.FullChunkStatus.INACCESSIBLE);
+ }
+ }
+
+ ret = true;
+ }
+ } finally {
+ this.processingFullStatus = false;
+ holderManager.removeTicketAtLevel(TicketType.STATUS_UPGRADE, this.chunkX, this.chunkZ, ticketKeep, ticketId);
+ }
+
+ return ret;
+ }
+
+ // note: must hold scheduling lock
+ // rets true if the current requested gen status is not null (effectively, whether further scheduling is not needed)
+ boolean upgradeGenTarget(final ChunkStatus toStatus) {
+ if (toStatus == null) {
+ throw new NullPointerException("toStatus cannot be null");
+ }
+ if (this.requestedGenStatus == null && this.generationTask == null) {
+ return false;
+ }
+ if (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(toStatus)) {
+ this.requestedGenStatus = toStatus;
+ }
+ return true;
+ }
+
+ public void setGenerationTarget(final ChunkStatus toStatus) {
+ this.requestedGenStatus = toStatus;
+ }
+
+ public boolean hasGenerationTask() {
+ return this.generationTask != null;
+ }
+
+ public ChunkStatus getCurrentGenStatus() {
+ return this.currentGenStatus;
+ }
+
+ public ChunkStatus getRequestedGenStatus() {
+ return this.requestedGenStatus;
+ }
+
+ private final Reference2ObjectOpenHashMap<ChunkStatus, List<Consumer<ChunkAccess>>> statusWaiters = new Reference2ObjectOpenHashMap<>();
+
+ void addStatusConsumer(final ChunkStatus status, final Consumer<ChunkAccess> consumer) {
+ this.statusWaiters.computeIfAbsent(status, (final ChunkStatus keyInMap) -> {
+ return new ArrayList<>(4);
+ }).add(consumer);
+ }
+
+ private void completeStatusConsumers(ChunkStatus status, final ChunkAccess chunk) {
+ // need to tell future statuses to complete if cancelled
+ do {
+ this.completeStatusConsumers0(status, chunk);
+ } while (chunk == null && status != (status = status.getNextStatus()));
+ }
+
+ private void completeStatusConsumers0(final ChunkStatus status, final ChunkAccess chunk) {
+ final List<Consumer<ChunkAccess>> consumers;
+ consumers = this.statusWaiters.remove(status);
+
+ if (consumers == null) {
+ return;
+ }
+
+ // must be scheduled to main, we do not trust the callback to not do anything stupid
+ this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> {
+ for (final Consumer<ChunkAccess> consumer : consumers) {
+ try {
+ consumer.accept(chunk);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to process chunk status callback", thr);
+ }
+ }
+ }, PrioritisedExecutor.Priority.HIGHEST);
+ }
+
+ private final Reference2ObjectOpenHashMap<ChunkHolder.FullChunkStatus, List<Consumer<LevelChunk>>> fullStatusWaiters = new Reference2ObjectOpenHashMap<>();
+
+ void addFullStatusConsumer(final ChunkHolder.FullChunkStatus status, final Consumer<LevelChunk> consumer) {
+ this.fullStatusWaiters.computeIfAbsent(status, (final ChunkHolder.FullChunkStatus keyInMap) -> {
+ return new ArrayList<>(4);
+ }).add(consumer);
+ }
+
+ private void completeFullStatusConsumers(ChunkHolder.FullChunkStatus status, final LevelChunk chunk) {
+ // need to tell future statuses to complete if cancelled
+ final ChunkHolder.FullChunkStatus max = CHUNK_STATUS_BY_ID[CHUNK_STATUS_BY_ID.length - 1];
+
+ for (;;) {
+ this.completeFullStatusConsumers0(status, chunk);
+ if (chunk != null || status == max) {
+ break;
+ }
+ status = CHUNK_STATUS_BY_ID[status.ordinal() + 1];
+ }
+ }
+
+ private void completeFullStatusConsumers0(final ChunkHolder.FullChunkStatus status, final LevelChunk chunk) {
+ final List<Consumer<LevelChunk>> consumers;
+ consumers = this.fullStatusWaiters.remove(status);
+
+ if (consumers == null) {
+ return;
+ }
+
+ // must be scheduled to main, we do not trust the callback to not do anything stupid
+ this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> {
+ for (final Consumer<LevelChunk> consumer : consumers) {
+ try {
+ consumer.accept(chunk);
+ } catch (final ThreadDeath thr) {
+ throw thr;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to process chunk status callback", thr);
+ }
+ }
+ }, PrioritisedExecutor.Priority.HIGHEST);
+ }
+
+ // note: must hold scheduling lock
+ private void onChunkGenComplete(final ChunkAccess newChunk, final ChunkStatus newStatus,
+ final List<ChunkProgressionTask> scheduleList, final List<NewChunkHolder> changedLoadStatus) {
+ if (!this.neighboursBlockingGenTask.isEmpty()) {
+ throw new IllegalStateException("Cannot have neighbours blocking this gen task");
+ }
+ if (newChunk != null || (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(newStatus))) {
+ this.completeStatusConsumers(newStatus, newChunk);
+ }
+ // done now, clear state (must be done before scheduling new tasks)
+ this.generationTask = null;
+ this.generationTaskStatus = null;
+ if (newChunk == null) {
+ // task was cancelled
+ // should be careful as this could be called while holding the schedule lock and/or inside the
+ // ticket level update
+ // while a task may be cancelled, it is possible for it to be later re-scheduled
+ // however, because generationTask is only set to null on _completion_, the scheduler leaves
+ // the rescheduling logic to us here
+ final ChunkStatus requestedGenStatus = this.requestedGenStatus;
+ this.requestedGenStatus = null;
+ if (requestedGenStatus != null) {
+ // it looks like it has been requested, so we must reschedule
+ if (!this.neighboursWaitingForUs.isEmpty()) {
+ for (final Iterator<Reference2ObjectMap.Entry<NewChunkHolder, ChunkStatus>> iterator = this.neighboursWaitingForUs.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) {
+ final Reference2ObjectMap.Entry<NewChunkHolder, ChunkStatus> entry = iterator.next();
+
+ final NewChunkHolder chunkHolder = entry.getKey();
+ final ChunkStatus toStatus = entry.getValue();
+
+ if (!requestedGenStatus.isOrAfter(toStatus)) {
+ // if we were cancelled, we are responsible for removing the waiter
+ if (!chunkHolder.neighboursBlockingGenTask.remove(this)) {
+ throw new IllegalStateException("Corrupt state");
+ }
+ if (chunkHolder.neighboursBlockingGenTask.isEmpty()) {
+ chunkHolder.checkUnload();
+ }
+ iterator.remove();
+ continue;
+ }
+ }
+ }
+
+ // note: only after generationTask -> null, generationTaskStatus -> null, and requestedGenStatus -> null
+ this.scheduler.schedule(
+ this.chunkX, this.chunkZ, requestedGenStatus, this, scheduleList
+ );
+
+ // return, can't do anything further
+ return;
+ }
+
+ if (!this.neighboursWaitingForUs.isEmpty()) {
+ for (final NewChunkHolder chunkHolder : this.neighboursWaitingForUs.keySet()) {
+ if (!chunkHolder.neighboursBlockingGenTask.remove(this)) {
+ throw new IllegalStateException("Corrupt state");
+ }
+ if (chunkHolder.neighboursBlockingGenTask.isEmpty()) {
+ chunkHolder.checkUnload();
+ }
+ }
+ this.neighboursWaitingForUs.clear();
+ }
+ // reset priority, we have nothing left to generate to
+ this.setPriority(PrioritisedExecutor.Priority.NORMAL);
+ this.checkUnload();
+ return;
+ }
+
+ this.currentChunk = newChunk;
+ this.currentGenStatus = newStatus;
+ this.lastChunkCompletion = new ChunkCompletion(newChunk, newStatus);
+
+ final ChunkStatus requestedGenStatus = this.requestedGenStatus;
+
+ List<NewChunkHolder> needsScheduling = null;
+ boolean recalculatePriority = false;
+ for (final Iterator<Reference2ObjectMap.Entry<NewChunkHolder, ChunkStatus>> iterator
+ = this.neighboursWaitingForUs.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) {
+ final Reference2ObjectMap.Entry<NewChunkHolder, ChunkStatus> entry = iterator.next();
+ final NewChunkHolder neighbour = entry.getKey();
+ final ChunkStatus requiredStatus = entry.getValue();
+
+ if (!newStatus.isOrAfter(requiredStatus)) {
+ if (requestedGenStatus == null || !requestedGenStatus.isOrAfter(requiredStatus)) {
+ // if we're cancelled, still need to clear this map
+ if (!neighbour.neighboursBlockingGenTask.remove(this)) {
+ throw new IllegalStateException("Neighbour is not waiting for us?");
+ }
+ if (neighbour.neighboursBlockingGenTask.isEmpty()) {
+ neighbour.checkUnload();
+ }
+
+ iterator.remove();
+ }
+ continue;
+ }
+
+ // doesn't matter what isCancelled is here, we need to schedule if we can
+
+ recalculatePriority = true;
+ if (!neighbour.neighboursBlockingGenTask.remove(this)) {
+ throw new IllegalStateException("Neighbour is not waiting for us?");
+ }
+
+ if (neighbour.neighboursBlockingGenTask.isEmpty()) {
+ if (neighbour.requestedGenStatus != null) {
+ if (needsScheduling == null) {
+ needsScheduling = new ArrayList<>();
+ }
+ needsScheduling.add(neighbour);
+ } else {
+ neighbour.checkUnload();
+ }
+ }
+
+ // remove last; access to entry will throw if removed
+ iterator.remove();
+ }
+
+ if (newStatus == ChunkStatus.FULL) {
+ this.lockPriority();
+ // must use oldTicketLevel, we hold the schedule lock but not the ticket level lock
+ // however, schedule lock needs to be held for ticket level callback, so we're fine here
+ if (ChunkHolder.getFullChunkStatus(this.oldTicketLevel).isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
+ this.queueBorderFullStatus(true, changedLoadStatus);
+ }
+ }
+
+ if (recalculatePriority) {
+ this.recalculateNeighbourRequestedPriority();
+ }
+
+ if (requestedGenStatus != null && !newStatus.isOrAfter(requestedGenStatus)) {
+ this.scheduleNeighbours(needsScheduling, scheduleList);
+
+ // we need to schedule more tasks now
+ this.scheduler.schedule(
+ this.chunkX, this.chunkZ, requestedGenStatus, this, scheduleList
+ );
+ } else {
+ // we're done now
+ if (requestedGenStatus != null) {
+ this.requestedGenStatus = null;
+ }
+ // reached final stage, so stop scheduling now
+ this.setPriority(PrioritisedExecutor.Priority.NORMAL);
+ this.checkUnload();
+
+ this.scheduleNeighbours(needsScheduling, scheduleList);
+ }
+ }
+
+ private void scheduleNeighbours(final List<NewChunkHolder> needsScheduling, final List<ChunkProgressionTask> scheduleList) {
+ if (needsScheduling != null) {
+ for (int i = 0, len = needsScheduling.size(); i < len; ++i) {
+ final NewChunkHolder neighbour = needsScheduling.get(i);
+
+ this.scheduler.schedule(
+ neighbour.chunkX, neighbour.chunkZ, neighbour.requestedGenStatus, neighbour, scheduleList
+ );
+ }
+ }
+ }
+
+ public void setGenerationTask(final ChunkProgressionTask generationTask, final ChunkStatus taskStatus,
+ final List<NewChunkHolder> neighbours) {
+ if (this.generationTask != null || (this.currentGenStatus != null && this.currentGenStatus.isOrAfter(taskStatus))) {
+ throw new IllegalStateException("Currently generating or provided task is trying to generate to a level we are already at!");
+ }
+ if (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(taskStatus)) {
+ throw new IllegalStateException("Cannot schedule generation task when not requested");
+ }
+ this.generationTask = generationTask;
+ this.generationTaskStatus = taskStatus;
+
+ for (int i = 0, len = neighbours.size(); i < len; ++i) {
+ neighbours.get(i).addNeighbourUsingChunk();
+ }
+
+ this.checkUnload();
+
+ generationTask.onComplete((final ChunkAccess access, final Throwable thr) -> {
+ if (generationTask != this.generationTask) {
+ throw new IllegalStateException(
+ "Cannot complete generation task '" + generationTask + "' because we are waiting on '" + this.generationTask + "' instead!"
+ );
+ }
+ if (thr != null) {
+ if (this.genTaskException != null) {
+ // first one is probably the TRUE problem
+ return;
+ }
+ // don't set generation task to null, so that scheduling will not attempt to create another task and it
+ // will automatically block any further scheduling usage of this chunk as it will wait forever for a failed
+ // task to complete
+ this.genTaskException = thr;
+ this.failedGenStatus = taskStatus;
+ this.genTaskFailedThread = Thread.currentThread();
+
+ this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of(
+ "Generation task", ChunkTaskScheduler.stringIfNull(generationTask),
+ "Task to status", ChunkTaskScheduler.stringIfNull(taskStatus)
+ ), thr);
+ return;
+ }
+
+ final boolean scheduleTasks;
+ List<ChunkProgressionTask> tasks = ChunkHolderManager.getCurrentTicketUpdateScheduling();
+ if (tasks == null) {
+ scheduleTasks = true;
+ tasks = new ArrayList<>();
+ } else {
+ scheduleTasks = false;
+ // we are currently updating ticket levels, so we already hold the schedule lock
+ // this means we have to leave the ticket level update to handle the scheduling
+ }
+ final List<NewChunkHolder> changedLoadStatus = new ArrayList<>();
+ this.scheduler.schedulingLock.lock();
+ try {
+ for (int i = 0, len = neighbours.size(); i < len; ++i) {
+ neighbours.get(i).removeNeighbourUsingChunk();
+ }
+ this.onChunkGenComplete(access, taskStatus, tasks, changedLoadStatus);
+ } finally {
+ this.scheduler.schedulingLock.unlock();
+ }
+ this.scheduler.chunkHolderManager.addChangedStatuses(changedLoadStatus);
+
+ if (scheduleTasks) {
+ // can't hold the lock while scheduling, so we have to build the tasks and then schedule after
+ for (int i = 0, len = tasks.size(); i < len; ++i) {
+ tasks.get(i).schedule();
+ }
+ }
+ });
+ }
+
+ public PoiChunk getPoiChunk() {
+ return this.poiChunk;
+ }
+
+ public ChunkEntitySlices getEntityChunk() {
+ return this.entityChunk;
+ }
+
+ public long lastAutoSave;
+
+ public boolean save(final boolean shutdown, final boolean unloading) {
+ TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot save data off-main");
+
+ ChunkAccess chunk = this.getCurrentChunk();
+ PoiChunk poi = this.getPoiChunk();
+ ChunkEntitySlices entities = this.getEntityChunk();
+ boolean executedUnloadTask = false;
+
+ if (shutdown) {
+ // make sure that the async unloads complete
+ if (this.unloadState != null) {
+ // must have errored during unload
+ chunk = this.unloadState.chunk();
+ poi = this.unloadState.poiChunk();
+ entities = this.unloadState.entityChunk();
+ }
+ final UnloadTask chunkUnloadTask = this.chunkDataUnload;
+ final DelayedPrioritisedTask chunkDataUnloadTask = chunkUnloadTask == null ? null : chunkUnloadTask.task();
+ if (chunkDataUnloadTask != null) {
+ final PrioritisedExecutor.PrioritisedTask unloadTask = chunkDataUnloadTask.getTask();
+ if (unloadTask != null) {
+ executedUnloadTask = unloadTask.execute();
+ }
+ }
+ }
+
+ boolean canSaveChunk = !(chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave) &&
+ (chunk != null && ((shutdown || chunk instanceof LevelChunk) && chunk.isUnsaved()));
+ boolean canSavePOI = !(chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave) && (poi != null && poi.isDirty());
+ boolean canSaveEntities = entities != null;
+
+ try (co.aikar.timings.Timing ignored = this.world.timings.chunkSave.startTiming()) { // Paper
+ if (canSaveChunk) {
+ canSaveChunk = this.saveChunk(chunk, unloading);
+ }
+ if (canSavePOI) {
+ canSavePOI = this.savePOI(poi, unloading);
+ }
+ if (canSaveEntities) {
+ // on shutdown, we need to force transient entity chunks to save
+ canSaveEntities = this.saveEntities(entities, unloading || shutdown);
+ if (unloading || shutdown) {
+ this.lastEntityUnload = null;
+ }
+ }
+ }
+
+ return executedUnloadTask | canSaveChunk | canSaveEntities | canSavePOI;
+ }
+
+ static final class AsyncChunkSerializeTask implements Runnable {
+
+ private final ServerLevel world;
+ private final ChunkAccess chunk;
+ private final ChunkSerializer.AsyncSaveData asyncSaveData;
+ private final NewChunkHolder toComplete;
+
+ public AsyncChunkSerializeTask(final ServerLevel world, final ChunkAccess chunk, final ChunkSerializer.AsyncSaveData asyncSaveData,
+ final NewChunkHolder toComplete) {
+ this.world = world;
+ this.chunk = chunk;
+ this.asyncSaveData = asyncSaveData;
+ this.toComplete = toComplete;
+ }
+
+ @Override
+ public void run() {
+ final CompoundTag toSerialize;
+ try {
+ toSerialize = ChunkSerializer.saveChunk(this.world, this.chunk, this.asyncSaveData);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable throwable) {
+ LOGGER.error("Failed to asynchronously save chunk " + this.chunk.getPos() + " for world '" + this.world.getWorld().getName() + "', falling back to synchronous save", throwable);
+ this.world.chunkTaskScheduler.scheduleChunkTask(this.chunk.locX, this.chunk.locZ, () -> {
+ final CompoundTag synchronousSave;
+ try {
+ synchronousSave = ChunkSerializer.saveChunk(AsyncChunkSerializeTask.this.world, AsyncChunkSerializeTask.this.chunk, AsyncChunkSerializeTask.this.asyncSaveData);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable throwable2) {
+ LOGGER.error("Failed to synchronously save chunk " + AsyncChunkSerializeTask.this.chunk.getPos() + " for world '" + AsyncChunkSerializeTask.this.world.getWorld().getName() + "', chunk data will be lost", throwable2);
+ AsyncChunkSerializeTask.this.toComplete.completeAsyncChunkDataSave(null);
+ return;
+ }
+
+ AsyncChunkSerializeTask.this.toComplete.completeAsyncChunkDataSave(synchronousSave);
+ LOGGER.info("Successfully serialized chunk " + AsyncChunkSerializeTask.this.chunk.getPos() + " for world '" + AsyncChunkSerializeTask.this.world.getWorld().getName() + "' synchronously");
+
+ }, PrioritisedExecutor.Priority.HIGHEST);
+ return;
+ }
+ this.toComplete.completeAsyncChunkDataSave(toSerialize);
+ }
+
+ @Override
+ public String toString() {
+ return "AsyncChunkSerializeTask{" +
+ "chunk={pos=" + this.chunk.getPos() + ",world=\"" + this.world.getWorld().getName() + "\"}" +
+ "}";
+ }
+ }
+
+ private boolean saveChunk(final ChunkAccess chunk, final boolean unloading) {
+ if (!chunk.isUnsaved()) {
+ if (unloading) {
+ this.completeAsyncChunkDataSave(null);
+ }
+ return false;
+ }
+ boolean completing = false;
+ try {
+ if (unloading) {
+ try {
+ final ChunkSerializer.AsyncSaveData asyncSaveData = ChunkSerializer.getAsyncSaveData(this.world, chunk);
+
+ final PrioritisedExecutor.PrioritisedTask task = this.scheduler.loadExecutor.createTask(new AsyncChunkSerializeTask(this.world, chunk, asyncSaveData, this));
+
+ this.chunkDataUnload.task().setTask(task);
+
+ task.queue();
+
+ chunk.setUnsaved(false);
+
+ return true;
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to prepare async chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "', falling back to synchronous save", thr);
+ // fall through to synchronous save
+ }
+ }
+
+ final CompoundTag save = ChunkSerializer.saveChunk(this.world, chunk, null);
+
+ if (unloading) {
+ completing = true;
+ this.completeAsyncChunkDataSave(save);
+ LOGGER.info("Successfully serialized chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "' synchronously");
+ } else {
+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.CHUNK_DATA);
+ }
+ chunk.setUnsaved(false);
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to save chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'");
+ if (unloading && !completing) {
+ this.completeAsyncChunkDataSave(null);
+ }
+ }
+
+ return true;
+ }
+
+ private boolean lastEntitySaveNull;
+ private CompoundTag lastEntityUnload;
+ private boolean saveEntities(final ChunkEntitySlices entities, final boolean unloading) {
+ try {
+ CompoundTag mergeFrom = null;
+ if (entities.isTransient()) {
+ if (!unloading) {
+ // if we're a transient chunk, we cannot save until unloading because otherwise a double save will
+ // result in double adding the entities
+ return false;
+ }
+ try {
+ mergeFrom = RegionFileIOThread.loadData(this.world, this.chunkX, this.chunkZ, RegionFileIOThread.RegionFileType.ENTITY_DATA, PrioritisedExecutor.Priority.BLOCKING);
+ } catch (final Exception ex) {
+ LOGGER.error("Cannot merge transient entities for chunk (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "', data on disk will be replaced", ex);
+ }
+ }
+
+ final CompoundTag save = entities.save();
+ if (mergeFrom != null) {
+ if (save == null) {
+ // don't override the data on disk with nothing
+ return false;
+ } else {
+ EntityStorage.copyEntities(mergeFrom, save);
+ }
+ }
+ if (save == null && this.lastEntitySaveNull) {
+ return false;
+ }
+
+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.ENTITY_DATA);
+ this.lastEntitySaveNull = save == null;
+ if (unloading) {
+ this.lastEntityUnload = save;
+ }
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to save entity data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'");
+ }
+
+ return true;
+ }
+
+ private boolean lastPoiSaveNull;
+ private boolean savePOI(final PoiChunk poi, final boolean unloading) {
+ try {
+ final CompoundTag save = poi.save();
+ poi.setDirty(false);
+ if (save == null && this.lastPoiSaveNull) {
+ if (unloading) {
+ this.poiDataUnload.completable().complete(null);
+ }
+ return false;
+ }
+
+ RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.POI_DATA);
+ this.lastPoiSaveNull = save == null;
+ if (unloading) {
+ this.poiDataUnload.completable().complete(save);
+ }
+ } catch (final ThreadDeath death) {
+ throw death;
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to save poi data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'");
+ }
+
+ return true;
+ }
+
+ @Override
+ public String toString() {
+ final ChunkCompletion lastCompletion = this.lastChunkCompletion;
+ final ChunkEntitySlices entityChunk = this.entityChunk;
+ final long chunkStatus = this.chunkStatus;
+ final int fullChunkStatus = (int)chunkStatus;
+ final int pendingChunkStatus = (int)(chunkStatus >>> 32);
+ final ChunkHolder.FullChunkStatus currentFullStatus = fullChunkStatus < 0 || fullChunkStatus >= CHUNK_STATUS_BY_ID.length ? null : CHUNK_STATUS_BY_ID[fullChunkStatus];
+ final ChunkHolder.FullChunkStatus pendingFullStatus = pendingChunkStatus < 0 || pendingChunkStatus >= CHUNK_STATUS_BY_ID.length ? null : CHUNK_STATUS_BY_ID[pendingChunkStatus];
+ return "NewChunkHolder{" +
+ "world=" + this.world.getWorld().getName() +
+ ", chunkX=" + this.chunkX +
+ ", chunkZ=" + this.chunkZ +
+ ", entityChunkFromDisk=" + (entityChunk != null && !entityChunk.isTransient()) +
+ ", lastChunkCompletion={chunk_class=" + (lastCompletion == null || lastCompletion.chunk() == null ? "null" : lastCompletion.chunk().getClass().getName()) + ",status=" + (lastCompletion == null ? "null" : lastCompletion.genStatus()) + "}" +
+ ", currentGenStatus=" + this.currentGenStatus +
+ ", requestedGenStatus=" + this.requestedGenStatus +
+ ", generationTask=" + this.generationTask +
+ ", generationTaskStatus=" + this.generationTaskStatus +
+ ", priority=" + this.priority +
+ ", priorityLocked=" + this.priorityLocked +
+ ", neighbourRequestedPriority=" + this.neighbourRequestedPriority +
+ ", effective_priority=" + this.getEffectivePriority() +
+ ", oldTicketLevel=" + this.oldTicketLevel +
+ ", currentTicketLevel=" + this.currentTicketLevel +
+ ", totalNeighboursUsingThisChunk=" + this.totalNeighboursUsingThisChunk +
+ ", fullNeighbourChunksLoadedBitset=" + this.fullNeighbourChunksLoadedBitset +
+ ", chunkStatusRaw=" + chunkStatus +
+ ", currentChunkStatus=" + currentFullStatus +
+ ", pendingChunkStatus=" + pendingFullStatus +
+ ", is_unload_safe=" + this.isSafeToUnload() +
+ ", killed=" + this.killed +
+ '}';
+ }
+
+ private static JsonElement serializeCompletable(final Completable<?> completable) {
+ if (completable == null) {
+ return new JsonPrimitive("null");
+ }
+
+ final JsonObject ret = new JsonObject();
+ final boolean isCompleted = completable.isCompleted();
+ ret.addProperty("completed", Boolean.valueOf(isCompleted));
+
+ if (isCompleted) {
+ ret.addProperty("completed_exceptionally", Boolean.valueOf(completable.getThrowable() != null));
+ }
+
+ return ret;
+ }
+
+ // holds ticket and scheduling lock
+ public JsonObject getDebugJson() {
+ final JsonObject ret = new JsonObject();
+
+ final ChunkCompletion lastCompletion = this.lastChunkCompletion;
+ final ChunkEntitySlices slices = this.entityChunk;
+ final PoiChunk poiChunk = this.poiChunk;
+
+ ret.addProperty("chunkX", Integer.valueOf(this.chunkX));
+ ret.addProperty("chunkZ", Integer.valueOf(this.chunkZ));
+ ret.addProperty("entity_chunk", slices == null ? "null" : "transient=" + slices.isTransient());
+ ret.addProperty("poi_chunk", "null=" + (poiChunk == null));
+ ret.addProperty("completed_chunk_class", lastCompletion == null ? "null" : lastCompletion.chunk().getClass().getName());
+ ret.addProperty("completed_gen_status", lastCompletion == null ? "null" : lastCompletion.genStatus().toString());
+ ret.addProperty("priority", Objects.toString(this.priority));
+ ret.addProperty("neighbour_requested_priority", Objects.toString(this.neighbourRequestedPriority));
+ ret.addProperty("generation_task", Objects.toString(this.generationTask));
+ ret.addProperty("is_safe_unload", Objects.toString(this.isSafeToUnload()));
+ ret.addProperty("old_ticket_level", Integer.valueOf(this.oldTicketLevel));
+ ret.addProperty("current_ticket_level", Integer.valueOf(this.currentTicketLevel));
+ ret.addProperty("neighbours_using_chunk", Integer.valueOf(this.totalNeighboursUsingThisChunk));
+
+ final JsonObject neighbourWaitState = new JsonObject();
+ ret.add("neighbour_state", neighbourWaitState);
+
+ final JsonArray blockingGenNeighbours = new JsonArray();
+ neighbourWaitState.add("blocking_gen_task", blockingGenNeighbours);
+ for (final NewChunkHolder blockingGenNeighbour : this.neighboursBlockingGenTask) {
+ final JsonObject neighbour = new JsonObject();
+ blockingGenNeighbours.add(neighbour);
+
+ neighbour.addProperty("chunkX", Integer.valueOf(blockingGenNeighbour.chunkX));
+ neighbour.addProperty("chunkZ", Integer.valueOf(blockingGenNeighbour.chunkZ));
+ }
+
+ final JsonArray neighboursWaitingForUs = new JsonArray();
+ neighbourWaitState.add("neighbours_waiting_on_us", neighboursWaitingForUs);
+ for (final Reference2ObjectMap.Entry<NewChunkHolder, ChunkStatus> entry : this.neighboursWaitingForUs.reference2ObjectEntrySet()) {
+ final NewChunkHolder holder = entry.getKey();
+ final ChunkStatus status = entry.getValue();
+
+ final JsonObject neighbour = new JsonObject();
+ neighboursWaitingForUs.add(neighbour);
+
+
+ neighbour.addProperty("chunkX", Integer.valueOf(holder.chunkX));
+ neighbour.addProperty("chunkZ", Integer.valueOf(holder.chunkZ));
+ neighbour.addProperty("waiting_for", Objects.toString(status));
+ }
+
+ ret.addProperty("fullchunkstatus", Objects.toString(this.getChunkStatus()));
+ ret.addProperty("fullchunkstatus_raw", Long.valueOf(this.chunkStatus));
+ ret.addProperty("generation_task", Objects.toString(this.generationTask));
+ ret.addProperty("requested_generation", Objects.toString(this.requestedGenStatus));
+ ret.addProperty("has_entity_load_task", Boolean.valueOf(this.entityDataLoadTask != null));
+ ret.addProperty("has_poi_load_task", Boolean.valueOf(this.poiDataLoadTask != null));
+
+ final UnloadTask entityDataUnload = this.entityDataUnload;
+ final UnloadTask poiDataUnload = this.poiDataUnload;
+ final UnloadTask chunkDataUnload = this.chunkDataUnload;
+
+ ret.add("entity_unload_completable", serializeCompletable(entityDataUnload == null ? null : entityDataUnload.completable()));
+ ret.add("poi_unload_completable", serializeCompletable(poiDataUnload == null ? null : poiDataUnload.completable()));
+ ret.add("chunk_unload_completable", serializeCompletable(chunkDataUnload == null ? null : chunkDataUnload.completable()));
+
+ final DelayedPrioritisedTask unloadTask = chunkDataUnload == null ? null : chunkDataUnload.task();
+ if (unloadTask == null) {
+ ret.addProperty("unload_task_priority", "null");
+ ret.addProperty("unload_task_priority_raw", "null");
+ } else {
+ ret.addProperty("unload_task_priority", Objects.toString(unloadTask.getPriority()));
+ ret.addProperty("unload_task_priority_raw", Integer.valueOf(unloadTask.getPriorityInternal()));
+ }
+
+ ret.addProperty("killed", Boolean.valueOf(this.killed));
+
+ return ret;
+ }
+}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java
new file mode 100644
index 0000000000000000000000000000000000000000..b4c56bf12dc8dd17452210ece4fd67411cc6b2fd
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java
@@ -0,0 +1,215 @@
+package io.papermc.paper.chunk.system.scheduling;
+
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import java.lang.invoke.VarHandle;
+
+public abstract class PriorityHolder {
+
+ protected volatile int priority;
+ protected static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(PriorityHolder.class, "priority", int.class);
+
+ protected static final int PRIORITY_SCHEDULED = Integer.MIN_VALUE >>> 0;
+ protected static final int PRIORITY_EXECUTED = Integer.MIN_VALUE >>> 1;
+
+ protected final int getPriorityVolatile() {
+ return (int)PRIORITY_HANDLE.getVolatile((PriorityHolder)this);
+ }
+
+ protected final int compareAndExchangePriorityVolatile(final int expect, final int update) {
+ return (int)PRIORITY_HANDLE.compareAndExchange((PriorityHolder)this, (int)expect, (int)update);
+ }
+
+ protected final int getAndOrPriorityVolatile(final int val) {
+ return (int)PRIORITY_HANDLE.getAndBitwiseOr((PriorityHolder)this, (int)val);
+ }
+
+ protected final void setPriorityPlain(final int val) {
+ PRIORITY_HANDLE.set((PriorityHolder)this, (int)val);
+ }
+
+ protected PriorityHolder(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+ this.setPriorityPlain(priority.priority);
+ }
+
+ // used only for debug json
+ public boolean isScheduled() {
+ return (this.getPriorityVolatile() & PRIORITY_SCHEDULED) != 0;
+ }
+
+ // returns false if cancelled
+ protected boolean markExecuting() {
+ return (this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) == 0;
+ }
+
+ protected boolean isMarkedExecuted() {
+ return (this.getPriorityVolatile() & PRIORITY_EXECUTED) != 0;
+ }
+
+ public void cancel() {
+ if ((this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) != 0) {
+ // cancelled already
+ return;
+ }
+ this.cancelScheduled();
+ }
+
+ public void schedule() {
+ int priority = this.getPriorityVolatile();
+
+ if ((priority & PRIORITY_SCHEDULED) != 0) {
+ throw new IllegalStateException("schedule() called twice");
+ }
+
+ if ((priority & PRIORITY_EXECUTED) != 0) {
+ // cancelled
+ return;
+ }
+
+ this.scheduleTask(PrioritisedExecutor.Priority.getPriority(priority));
+
+ int failures = 0;
+ for (;;) {
+ if (priority == (priority = this.compareAndExchangePriorityVolatile(priority, priority | PRIORITY_SCHEDULED))) {
+ return;
+ }
+
+ if ((priority & PRIORITY_SCHEDULED) != 0) {
+ throw new IllegalStateException("schedule() called twice");
+ }
+
+ if ((priority & PRIORITY_EXECUTED) != 0) {
+ // cancelled or executed
+ return;
+ }
+
+ this.setPriorityScheduled(PrioritisedExecutor.Priority.getPriority(priority));
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public final PrioritisedExecutor.Priority getPriority() {
+ final int ret = this.getPriorityVolatile();
+ if ((ret & PRIORITY_EXECUTED) != 0) {
+ return PrioritisedExecutor.Priority.COMPLETING;
+ }
+ if ((ret & PRIORITY_SCHEDULED) != 0) {
+ return this.getScheduledPriority();
+ }
+ return PrioritisedExecutor.Priority.getPriority(ret);
+ }
+
+ public final void lowerPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+
+ int failures = 0;
+ for (int curr = this.getPriorityVolatile();;) {
+ if ((curr & PRIORITY_EXECUTED) != 0) {
+ return;
+ }
+
+ if ((curr & PRIORITY_SCHEDULED) != 0) {
+ this.lowerPriorityScheduled(priority);
+ return;
+ }
+
+ if (!priority.isLowerPriority(curr)) {
+ return;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) {
+ return;
+ }
+
+ // failed, retry
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public final void setPriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+
+ int failures = 0;
+ for (int curr = this.getPriorityVolatile();;) {
+ if ((curr & PRIORITY_EXECUTED) != 0) {
+ return;
+ }
+
+ if ((curr & PRIORITY_SCHEDULED) != 0) {
+ this.setPriorityScheduled(priority);
+ return;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) {
+ return;
+ }
+
+ // failed, retry
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ public final void raisePriority(final PrioritisedExecutor.Priority priority) {
+ if (!PrioritisedExecutor.Priority.isValidPriority(priority)) {
+ throw new IllegalArgumentException("Invalid priority " + priority);
+ }
+
+ int failures = 0;
+ for (int curr = this.getPriorityVolatile();;) {
+ if ((curr & PRIORITY_EXECUTED) != 0) {
+ return;
+ }
+
+ if ((curr & PRIORITY_SCHEDULED) != 0) {
+ this.raisePriorityScheduled(priority);
+ return;
+ }
+
+ if (!priority.isHigherPriority(curr)) {
+ return;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) {
+ return;
+ }
+
+ // failed, retry
+
+ ++failures;
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+ }
+ }
+
+ protected abstract void cancelScheduled();
+
+ protected abstract PrioritisedExecutor.Priority getScheduledPriority();
+
+ protected abstract void scheduleTask(final PrioritisedExecutor.Priority priority);
+
+ protected abstract void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority);
+
+ protected abstract void setPriorityScheduled(final PrioritisedExecutor.Priority priority);
+
+ protected abstract void raisePriorityScheduled(final PrioritisedExecutor.Priority priority);
+}
diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java
index c9a2ac696f7cefc8b0715f53db3fc541f26b62f6..1e9105cf5ab2ff0ee847fafd00b41e1bd47f1d9e 100644
--- a/src/main/java/io/papermc/paper/command/PaperCommand.java
+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java
@@ -1,5 +1,6 @@
package io.papermc.paper.command;
+import io.papermc.paper.command.subcommands.ChunkDebugCommand;
import io.papermc.paper.command.subcommands.EntityCommand;
import io.papermc.paper.command.subcommands.FixLightCommand;
import io.papermc.paper.command.subcommands.HeapDumpCommand;
@@ -42,6 +43,7 @@ public final class PaperCommand extends Command {
commands.put(Set.of("reload"), new ReloadCommand());
commands.put(Set.of("version"), new VersionCommand());
commands.put(Set.of("fixlight"), new FixLightCommand());
+ commands.put(Set.of("debug", "chunkinfo", "holderinfo"), new ChunkDebugCommand());
return commands.entrySet().stream()
.flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue())))
diff --git a/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java
new file mode 100644
index 0000000000000000000000000000000000000000..628c549b1436c3de75071ecd6182a9beadd4840b
--- /dev/null
+++ b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java
@@ -0,0 +1,264 @@
+package io.papermc.paper.command.subcommands;
+
+import io.papermc.paper.command.CommandUtil;
+import io.papermc.paper.command.PaperSubcommand;
+import java.io.File;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+import net.minecraft.server.MCUtil;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ImposterProtoChunk;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.ProtoChunk;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+import static net.kyori.adventure.text.Component.text;
+import static net.kyori.adventure.text.format.NamedTextColor.BLUE;
+import static net.kyori.adventure.text.format.NamedTextColor.DARK_AQUA;
+import static net.kyori.adventure.text.format.NamedTextColor.GREEN;
+import static net.kyori.adventure.text.format.NamedTextColor.RED;
+
+@DefaultQualifier(NonNull.class)
+public final class ChunkDebugCommand implements PaperSubcommand {
+ @Override
+ public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
+ switch (subCommand) {
+ case "debug" -> this.doDebug(sender, args);
+ case "chunkinfo" -> this.doChunkInfo(sender, args);
+ case "holderinfo" -> this.doHolderInfo(sender, args);
+ }
+ return true;
+ }
+
+ @Override
+ public List<String> tabComplete(final CommandSender sender, final String subCommand, final String[] args) {
+ switch (subCommand) {
+ case "debug" -> {
+ if (args.length == 1) {
+ return CommandUtil.getListMatchingLast(sender, args, "help", "chunks");
+ }
+ }
+ case "holderinfo" -> {
+ List<String> worldNames = new ArrayList<>();
+ worldNames.add("*");
+ for (org.bukkit.World world : Bukkit.getWorlds()) {
+ worldNames.add(world.getName());
+ }
+ if (args.length == 1) {
+ return CommandUtil.getListMatchingLast(sender, args, worldNames);
+ }
+ }
+ case "chunkinfo" -> {
+ List<String> worldNames = new ArrayList<>();
+ worldNames.add("*");
+ for (org.bukkit.World world : Bukkit.getWorlds()) {
+ worldNames.add(world.getName());
+ }
+ if (args.length == 1) {
+ return CommandUtil.getListMatchingLast(sender, args, worldNames);
+ }
+ }
+ }
+ return Collections.emptyList();
+ }
+
+ private void doChunkInfo(final CommandSender sender, final String[] args) {
+ List<org.bukkit.World> worlds;
+ if (args.length < 1 || args[0].equals("*")) {
+ worlds = Bukkit.getWorlds();
+ } else {
+ worlds = new ArrayList<>(args.length);
+ for (final String arg : args) {
+ org.bukkit.@Nullable World world = Bukkit.getWorld(arg);
+ if (world == null) {
+ sender.sendMessage(text("World '" + arg + "' is invalid", RED));
+ return;
+ }
+ worlds.add(world);
+ }
+ }
+
+ int accumulatedTotal = 0;
+ int accumulatedInactive = 0;
+ int accumulatedBorder = 0;
+ int accumulatedTicking = 0;
+ int accumulatedEntityTicking = 0;
+
+ for (final org.bukkit.World bukkitWorld : worlds) {
+ final ServerLevel world = ((CraftWorld) bukkitWorld).getHandle();
+
+ int total = 0;
+ int inactive = 0;
+ int border = 0;
+ int ticking = 0;
+ int entityTicking = 0;
+
+ for (final ChunkHolder chunk : net.minecraft.server.ChunkSystem.getVisibleChunkHolders(world)) {
+ if (chunk.getFullChunkNowUnchecked() == null) {
+ continue;
+ }
+
+ ++total;
+
+ ChunkHolder.FullChunkStatus state = chunk.getFullStatus();
+
+ switch (state) {
+ case INACCESSIBLE -> ++inactive;
+ case BORDER -> ++border;
+ case TICKING -> ++ticking;
+ case ENTITY_TICKING -> ++entityTicking;
+ }
+ }
+
+ accumulatedTotal += total;
+ accumulatedInactive += inactive;
+ accumulatedBorder += border;
+ accumulatedTicking += ticking;
+ accumulatedEntityTicking += entityTicking;
+
+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text(bukkitWorld.getName(), GREEN), text(":")));
+ sender.sendMessage(text().color(DARK_AQUA).append(
+ text("Total: ", BLUE), text(total),
+ text(" Inactive: ", BLUE), text(inactive),
+ text(" Border: ", BLUE), text(border),
+ text(" Ticking: ", BLUE), text(ticking),
+ text(" Entity: ", BLUE), text(entityTicking)
+ ));
+ }
+ if (worlds.size() > 1) {
+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text("all listed worlds", GREEN), text(":", DARK_AQUA)));
+ sender.sendMessage(text().color(DARK_AQUA).append(
+ text("Total: ", BLUE), text(accumulatedTotal),
+ text(" Inactive: ", BLUE), text(accumulatedInactive),
+ text(" Border: ", BLUE), text(accumulatedBorder),
+ text(" Ticking: ", BLUE), text(accumulatedTicking),
+ text(" Entity: ", BLUE), text(accumulatedEntityTicking)
+ ));
+ }
+ }
+
+ private void doHolderInfo(final CommandSender sender, final String[] args) {
+ List<org.bukkit.World> worlds;
+ if (args.length < 1 || args[0].equals("*")) {
+ worlds = Bukkit.getWorlds();
+ } else {
+ worlds = new ArrayList<>(args.length);
+ for (final String arg : args) {
+ org.bukkit.@Nullable World world = Bukkit.getWorld(arg);
+ if (world == null) {
+ sender.sendMessage(text("World '" + arg + "' is invalid", RED));
+ return;
+ }
+ worlds.add(world);
+ }
+ }
+
+ int accumulatedTotal = 0;
+ int accumulatedCanUnload = 0;
+ int accumulatedNull = 0;
+ int accumulatedReadOnly = 0;
+ int accumulatedProtoChunk = 0;
+ int accumulatedFullChunk = 0;
+
+ for (final org.bukkit.World bukkitWorld : worlds) {
+ final ServerLevel world = ((CraftWorld) bukkitWorld).getHandle();
+
+ int total = 0;
+ int canUnload = 0;
+ int nullChunks = 0;
+ int readOnly = 0;
+ int protoChunk = 0;
+ int fullChunk = 0;
+
+ for (final ChunkHolder chunk : world.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders()) { // Paper - change updating chunks map
+ final ChunkAccess lastChunk = chunk.getAvailableChunkNow();
+
+ ++total;
+
+ if (lastChunk == null) {
+ ++nullChunks;
+ } else if (lastChunk instanceof ImposterProtoChunk) {
+ ++readOnly;
+ } else if (lastChunk instanceof ProtoChunk) {
+ ++protoChunk;
+ } else if (lastChunk instanceof LevelChunk) {
+ ++fullChunk;
+ }
+
+ if (chunk.newChunkHolder.isSafeToUnload() == null) {
+ ++canUnload;
+ }
+ }
+
+ accumulatedTotal += total;
+ accumulatedCanUnload += canUnload;
+ accumulatedNull += nullChunks;
+ accumulatedReadOnly += readOnly;
+ accumulatedProtoChunk += protoChunk;
+ accumulatedFullChunk += fullChunk;
+
+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text(bukkitWorld.getName(), GREEN), text(":")));
+ sender.sendMessage(text().color(DARK_AQUA).append(
+ text("Total: ", BLUE), text(total),
+ text(" Unloadable: ", BLUE), text(canUnload),
+ text(" Null: ", BLUE), text(nullChunks),
+ text(" ReadOnly: ", BLUE), text(readOnly),
+ text(" Proto: ", BLUE), text(protoChunk),
+ text(" Full: ", BLUE), text(fullChunk)
+ ));
+ }
+ if (worlds.size() > 1) {
+ sender.sendMessage(text().append(text("Chunks in ", BLUE), text("all listed worlds", GREEN), text(":", DARK_AQUA)));
+ sender.sendMessage(text().color(DARK_AQUA).append(
+ text("Total: ", BLUE), text(accumulatedTotal),
+ text(" Unloadable: ", BLUE), text(accumulatedCanUnload),
+ text(" Null: ", BLUE), text(accumulatedNull),
+ text(" ReadOnly: ", BLUE), text(accumulatedReadOnly),
+ text(" Proto: ", BLUE), text(accumulatedProtoChunk),
+ text(" Full: ", BLUE), text(accumulatedFullChunk)
+ ));
+ }
+ }
+
+ private void doDebug(final CommandSender sender, final String[] args) {
+ if (args.length < 1) {
+ sender.sendMessage(text("Use /paper debug [chunks] help for more information on a specific command", RED));
+ return;
+ }
+
+ final String debugType = args[0].toLowerCase(Locale.ENGLISH);
+ switch (debugType) {
+ case "chunks" -> {
+ if (args.length >= 2 && args[1].toLowerCase(Locale.ENGLISH).equals("help")) {
+ sender.sendMessage(text("Use /paper debug chunks [world] to dump loaded chunk information to a file", RED));
+ break;
+ }
+ File file = new File(new File(new File("."), "debug"),
+ "chunks-" + DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(LocalDateTime.now()) + ".txt");
+ sender.sendMessage(text("Writing chunk information dump to " + file, GREEN));
+ try {
+ MCUtil.dumpChunks(file, false);
+ sender.sendMessage(text("Successfully written chunk information!", GREEN));
+ } catch (Throwable thr) {
+ MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr);
+ sender.sendMessage(text("Failed to dump chunk information, see console", RED));
+ }
+ }
+ // "help" & default
+ default -> sender.sendMessage(text("Use /paper debug [chunks] help for more information on a specific command", RED));
+ }
+ }
+
+}
diff --git a/src/main/java/io/papermc/paper/util/TickThread.java b/src/main/java/io/papermc/paper/util/TickThread.java
index d59885ee9c8b29d5bac34dce0597e345e5358c77..fc57850b80303fcade89ca95794f63910404a407 100644
--- a/src/main/java/io/papermc/paper/util/TickThread.java
+++ b/src/main/java/io/papermc/paper/util/TickThread.java
@@ -6,7 +6,7 @@ import net.minecraft.world.entity.Entity;
import org.bukkit.Bukkit;
import java.util.concurrent.atomic.AtomicInteger;
-public final class TickThread extends Thread {
+public class TickThread extends Thread {
public static final boolean STRICT_THREAD_CHECKS = Boolean.getBoolean("paper.strict-thread-checks");
@@ -16,6 +16,10 @@ public final class TickThread extends Thread {
}
}
+ /**
+ * @deprecated
+ */
+ @Deprecated
public static void softEnsureTickThread(final String reason) {
if (!STRICT_THREAD_CHECKS) {
return;
@@ -23,6 +27,10 @@ public final class TickThread extends Thread {
ensureTickThread(reason);
}
+ /**
+ * @deprecated
+ */
+ @Deprecated
public static void ensureTickThread(final String reason) {
if (!isTickThread()) {
MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable());
@@ -66,14 +74,14 @@ public final class TickThread extends Thread {
}
public static boolean isTickThread() {
- return Bukkit.isPrimaryThread();
+ return Thread.currentThread() instanceof TickThread;
}
public static boolean isTickThreadFor(final ServerLevel world, final int chunkX, final int chunkZ) {
- return Bukkit.isPrimaryThread();
+ return Thread.currentThread() instanceof TickThread;
}
public static boolean isTickThreadFor(final Entity entity) {
- return Bukkit.isPrimaryThread();
+ return Thread.currentThread() instanceof TickThread;
}
}
diff --git a/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java b/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java
new file mode 100644
index 0000000000000000000000000000000000000000..f597d65d56964297eeeed6c7e77703764178fee0
--- /dev/null
+++ b/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java
@@ -0,0 +1,601 @@
+package io.papermc.paper.world;
+
+import com.destroystokyo.paper.util.maplist.EntityList;
+import io.papermc.paper.chunk.system.entity.EntityLookup;
+import io.papermc.paper.util.TickThread;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.util.Mth;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.boss.EnderDragonPart;
+import net.minecraft.world.entity.boss.enderdragon.EnderDragon;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.storage.EntityStorage;
+import net.minecraft.world.level.entity.Visibility;
+import net.minecraft.world.phys.AABB;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.function.Predicate;
+
+public final class ChunkEntitySlices {
+
+ protected final int minSection;
+ protected final int maxSection;
+ public final int chunkX;
+ public final int chunkZ;
+ protected final ServerLevel world;
+
+ protected final EntityCollectionBySection allEntities;
+ protected final EntityCollectionBySection hardCollidingEntities;
+ protected final Reference2ObjectOpenHashMap<Class<? extends Entity>, EntityCollectionBySection> entitiesByClass;
+ protected final EntityList entities = new EntityList();
+
+ public ChunkHolder.FullChunkStatus status;
+
+ protected boolean isTransient;
+
+ public boolean isTransient() {
+ return this.isTransient;
+ }
+
+ public void setTransient(final boolean value) {
+ this.isTransient = value;
+ }
+
+ // TODO implement container search optimisations
+
+ public ChunkEntitySlices(final ServerLevel world, final int chunkX, final int chunkZ, final ChunkHolder.FullChunkStatus status,
+ final int minSection, final int maxSection) { // inclusive, inclusive
+ this.minSection = minSection;
+ this.maxSection = maxSection;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.world = world;
+
+ this.allEntities = new EntityCollectionBySection(this);
+ this.hardCollidingEntities = new EntityCollectionBySection(this);
+ this.entitiesByClass = new Reference2ObjectOpenHashMap<>();
+
+ this.status = status;
+ }
+
+ // Paper start - optimise CraftChunk#getEntities
+ public org.bukkit.entity.Entity[] getChunkEntities() {
+ List<org.bukkit.entity.Entity> ret = new java.util.ArrayList<>();
+ final Entity[] entities = this.entities.getRawData();
+ for (int i = 0, size = Math.min(entities.length, this.entities.size()); i < size; ++i) {
+ final Entity entity = entities[i];
+ if (entity == null) {
+ continue;
+ }
+ final org.bukkit.entity.Entity bukkit = entity.getBukkitEntity();
+ if (bukkit != null && bukkit.isValid()) {
+ ret.add(bukkit);
+ }
+ }
+
+ return ret.toArray(new org.bukkit.entity.Entity[0]);
+ }
+
+ public CompoundTag save() {
+ final int len = this.entities.size();
+ if (len == 0) {
+ return null;
+ }
+
+ final Entity[] rawData = this.entities.getRawData();
+ final List<Entity> collectedEntities = new ArrayList<>(len);
+ for (int i = 0; i < len; ++i) {
+ final Entity entity = rawData[i];
+ if (entity.shouldBeSaved()) {
+ collectedEntities.add(entity);
+ }
+ }
+
+ if (collectedEntities.isEmpty()) {
+ return null;
+ }
+
+ return EntityStorage.saveEntityChunk(collectedEntities, new ChunkPos(this.chunkX, this.chunkZ), this.world);
+ }
+
+ // returns true if this chunk has transient entities remaining
+ public boolean unload() {
+ final int len = this.entities.size();
+ final Entity[] collectedEntities = Arrays.copyOf(this.entities.getRawData(), len);
+
+ for (int i = 0; i < len; ++i) {
+ final Entity entity = collectedEntities[i];
+ if (entity.isRemoved()) {
+ // removed by us below
+ continue;
+ }
+ if (entity.shouldBeSaved()) {
+ entity.setRemoved(Entity.RemovalReason.UNLOADED_TO_CHUNK);
+ if (entity.isVehicle()) {
+ // we cannot assume that these entities are contained within this chunk, because entities can
+ // desync - so we need to remove them all
+ for (final Entity passenger : entity.getIndirectPassengers()) {
+ passenger.setRemoved(Entity.RemovalReason.UNLOADED_TO_CHUNK);
+ }
+ }
+ }
+ }
+
+ return this.entities.size() != 0;
+ }
+
+ private List<Entity> getAllEntities() {
+ final int len = this.entities.size();
+ if (len == 0) {
+ return new ArrayList<>();
+ }
+
+ final Entity[] rawData = this.entities.getRawData();
+ final List<Entity> collectedEntities = new ArrayList<>(len);
+ for (int i = 0; i < len; ++i) {
+ collectedEntities.add(rawData[i]);
+ }
+
+ return collectedEntities;
+ }
+
+ public void callEntitiesLoadEvent() {
+ CraftEventFactory.callEntitiesLoadEvent(this.world, new ChunkPos(this.chunkX, this.chunkZ), this.getAllEntities());
+ }
+
+ public void callEntitiesUnloadEvent() {
+ CraftEventFactory.callEntitiesUnloadEvent(this.world, new ChunkPos(this.chunkX, this.chunkZ), this.getAllEntities());
+ }
+ // Paper end - optimise CraftChunk#getEntities
+
+ public boolean isEmpty() {
+ return this.entities.size() == 0;
+ }
+
+ public void mergeInto(final ChunkEntitySlices slices) {
+ final Entity[] entities = this.entities.getRawData();
+ for (int i = 0, size = Math.min(entities.length, this.entities.size()); i < size; ++i) {
+ final Entity entity = entities[i];
+ slices.addEntity(entity, entity.sectionY);
+ }
+ }
+
+ private boolean preventStatusUpdates;
+ public boolean startPreventingStatusUpdates() {
+ final boolean ret = this.preventStatusUpdates;
+ this.preventStatusUpdates = true;
+ return ret;
+ }
+
+ public void stopPreventingStatusUpdates(final boolean prev) {
+ this.preventStatusUpdates = prev;
+ }
+
+ public void updateStatus(final ChunkHolder.FullChunkStatus status, final EntityLookup lookup) {
+ this.status = status;
+
+ final Entity[] entities = this.entities.getRawData();
+
+ for (int i = 0, size = this.entities.size(); i < size; ++i) {
+ final Entity entity = entities[i];
+
+ final Visibility oldVisibility = EntityLookup.getEntityStatus(entity);
+ entity.chunkStatus = status;
+ final Visibility newVisibility = EntityLookup.getEntityStatus(entity);
+
+ lookup.entityStatusChange(entity, this, oldVisibility, newVisibility, false, false, false);
+ }
+ }
+
+ public boolean addEntity(final Entity entity, final int chunkSection) {
+ if (!this.entities.add(entity)) {
+ return false;
+ }
+ entity.chunkStatus = this.status;
+ final int sectionIndex = chunkSection - this.minSection;
+
+ this.allEntities.addEntity(entity, sectionIndex);
+
+ if (entity.hardCollides()) {
+ this.hardCollidingEntities.addEntity(entity, sectionIndex);
+ }
+
+ for (final Iterator<Reference2ObjectMap.Entry<Class<? extends Entity>, EntityCollectionBySection>> iterator =
+ this.entitiesByClass.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) {
+ final Reference2ObjectMap.Entry<Class<? extends Entity>, EntityCollectionBySection> entry = iterator.next();
+
+ if (entry.getKey().isInstance(entity)) {
+ entry.getValue().addEntity(entity, sectionIndex);
+ }
+ }
+
+ return true;
+ }
+
+ public boolean removeEntity(final Entity entity, final int chunkSection) {
+ if (!this.entities.remove(entity)) {
+ return false;
+ }
+ entity.chunkStatus = null;
+ final int sectionIndex = chunkSection - this.minSection;
+
+ this.allEntities.removeEntity(entity, sectionIndex);
+
+ if (entity.hardCollides()) {
+ this.hardCollidingEntities.removeEntity(entity, sectionIndex);
+ }
+
+ for (final Iterator<Reference2ObjectMap.Entry<Class<? extends Entity>, EntityCollectionBySection>> iterator =
+ this.entitiesByClass.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) {
+ final Reference2ObjectMap.Entry<Class<? extends Entity>, EntityCollectionBySection> entry = iterator.next();
+
+ if (entry.getKey().isInstance(entity)) {
+ entry.getValue().removeEntity(entity, sectionIndex);
+ }
+ }
+
+ return true;
+ }
+
+ public void getHardCollidingEntities(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ this.hardCollidingEntities.getEntities(except, box, into, predicate);
+ }
+
+ public void getEntities(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ this.allEntities.getEntitiesWithEnderDragonParts(except, box, into, predicate);
+ }
+
+ public void getEntitiesWithoutDragonParts(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ this.allEntities.getEntities(except, box, into, predicate);
+ }
+
+ public <T extends Entity> void getEntities(final EntityType<?> type, final AABB box, final List<? super T> into,
+ final Predicate<? super T> predicate) {
+ this.allEntities.getEntities(type, box, (List)into, (Predicate)predicate);
+ }
+
+ protected EntityCollectionBySection initClass(final Class<? extends Entity> clazz) {
+ final EntityCollectionBySection ret = new EntityCollectionBySection(this);
+
+ for (int sectionIndex = 0; sectionIndex < this.allEntities.entitiesBySection.length; ++sectionIndex) {
+ final BasicEntityList<Entity> sectionEntities = this.allEntities.entitiesBySection[sectionIndex];
+ if (sectionEntities == null) {
+ continue;
+ }
+
+ final Entity[] storage = sectionEntities.storage;
+
+ for (int i = 0, len = Math.min(storage.length, sectionEntities.size()); i < len; ++i) {
+ final Entity entity = storage[i];
+
+ if (clazz.isInstance(entity)) {
+ ret.addEntity(entity, sectionIndex);
+ }
+ }
+ }
+
+ return ret;
+ }
+
+ public <T extends Entity> void getEntities(final Class<? extends T> clazz, final Entity except, final AABB box, final List<? super T> into,
+ final Predicate<? super T> predicate) {
+ EntityCollectionBySection collection = this.entitiesByClass.get(clazz);
+ if (collection != null) {
+ collection.getEntitiesWithEnderDragonParts(except, clazz, box, (List)into, (Predicate)predicate);
+ } else {
+ this.entitiesByClass.putIfAbsent(clazz, collection = this.initClass(clazz));
+ collection.getEntitiesWithEnderDragonParts(except, clazz, box, (List)into, (Predicate)predicate);
+ }
+ }
+
+ protected static final class BasicEntityList<E extends Entity> {
+
+ protected static final Entity[] EMPTY = new Entity[0];
+ protected static final int DEFAULT_CAPACITY = 4;
+
+ protected E[] storage;
+ protected int size;
+
+ public BasicEntityList() {
+ this(0);
+ }
+
+ public BasicEntityList(final int cap) {
+ this.storage = (E[])(cap <= 0 ? EMPTY : new Entity[cap]);
+ }
+
+ public boolean isEmpty() {
+ return this.size == 0;
+ }
+
+ public int size() {
+ return this.size;
+ }
+
+ private void resize() {
+ if (this.storage == EMPTY) {
+ this.storage = (E[])new Entity[DEFAULT_CAPACITY];
+ } else {
+ this.storage = Arrays.copyOf(this.storage, this.storage.length * 2);
+ }
+ }
+
+ public void add(final E entity) {
+ final int idx = this.size++;
+ if (idx >= this.storage.length) {
+ this.resize();
+ this.storage[idx] = entity;
+ } else {
+ this.storage[idx] = entity;
+ }
+ }
+
+ public int indexOf(final E entity) {
+ final E[] storage = this.storage;
+
+ for (int i = 0, len = Math.min(this.storage.length, this.size); i < len; ++i) {
+ if (storage[i] == entity) {
+ return i;
+ }
+ }
+
+ return -1;
+ }
+
+ public boolean remove(final E entity) {
+ final int idx = this.indexOf(entity);
+ if (idx == -1) {
+ return false;
+ }
+
+ final int size = --this.size;
+ final E[] storage = this.storage;
+ if (idx != size) {
+ System.arraycopy(storage, idx + 1, storage, idx, size - idx);
+ }
+
+ storage[size] = null;
+
+ return true;
+ }
+
+ public boolean has(final E entity) {
+ return this.indexOf(entity) != -1;
+ }
+ }
+
+ protected static final class EntityCollectionBySection {
+
+ protected final ChunkEntitySlices manager;
+ protected final long[] nonEmptyBitset;
+ protected final BasicEntityList<Entity>[] entitiesBySection;
+ protected int count;
+
+ public EntityCollectionBySection(final ChunkEntitySlices manager) {
+ this.manager = manager;
+
+ final int sectionCount = manager.maxSection - manager.minSection + 1;
+
+ this.nonEmptyBitset = new long[(sectionCount + (Long.SIZE - 1)) >>> 6]; // (sectionCount + (Long.SIZE - 1)) / Long.SIZE
+ this.entitiesBySection = new BasicEntityList[sectionCount];
+ }
+
+ public void addEntity(final Entity entity, final int sectionIndex) {
+ BasicEntityList<Entity> list = this.entitiesBySection[sectionIndex];
+
+ if (list != null && list.has(entity)) {
+ return;
+ }
+
+ if (list == null) {
+ this.entitiesBySection[sectionIndex] = list = new BasicEntityList<>();
+ this.nonEmptyBitset[sectionIndex >>> 6] |= (1L << (sectionIndex & (Long.SIZE - 1)));
+ }
+
+ list.add(entity);
+ ++this.count;
+ }
+
+ public void removeEntity(final Entity entity, final int sectionIndex) {
+ final BasicEntityList<Entity> list = this.entitiesBySection[sectionIndex];
+
+ if (list == null || !list.remove(entity)) {
+ return;
+ }
+
+ --this.count;
+
+ if (list.isEmpty()) {
+ this.entitiesBySection[sectionIndex] = null;
+ this.nonEmptyBitset[sectionIndex >>> 6] ^= (1L << (sectionIndex & (Long.SIZE - 1)));
+ }
+ }
+
+ public void getEntities(final Entity except, final AABB box, final List<Entity> into, final Predicate<? super Entity> predicate) {
+ if (this.count == 0) {
+ return;
+ }
+
+ final int minSection = this.manager.minSection;
+ final int maxSection = this.manager.maxSection;
+
+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection);
+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection);
+
+ final BasicEntityList<Entity>[] entitiesBySection = this.entitiesBySection;
+
+ for (int section = min; section <= max; ++section) {
+ final BasicEntityList<Entity> list = entitiesBySection[section - minSection];
+
+ if (list == null) {
+ continue;
+ }
+
+ final Entity[] storage = list.storage;
+
+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) {
+ final Entity entity = storage[i];
+
+ if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) {
+ continue;
+ }
+
+ if (predicate != null && !predicate.test(entity)) {
+ continue;
+ }
+
+ into.add(entity);
+ }
+ }
+ }
+
+ public void getEntitiesWithEnderDragonParts(final Entity except, final AABB box, final List<Entity> into,
+ final Predicate<? super Entity> predicate) {
+ if (this.count == 0) {
+ return;
+ }
+
+ final int minSection = this.manager.minSection;
+ final int maxSection = this.manager.maxSection;
+
+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection);
+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection);
+
+ final BasicEntityList<Entity>[] entitiesBySection = this.entitiesBySection;
+
+ for (int section = min; section <= max; ++section) {
+ final BasicEntityList<Entity> list = entitiesBySection[section - minSection];
+
+ if (list == null) {
+ continue;
+ }
+
+ final Entity[] storage = list.storage;
+
+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) {
+ final Entity entity = storage[i];
+
+ if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) {
+ continue;
+ }
+
+ if (predicate == null || predicate.test(entity)) {
+ into.add(entity);
+ } // else: continue to test the ender dragon parts
+
+ if (entity instanceof EnderDragon) {
+ for (final EnderDragonPart part : ((EnderDragon)entity).subEntities) {
+ if (part == except || !part.getBoundingBox().intersects(box)) {
+ continue;
+ }
+
+ if (predicate != null && !predicate.test(part)) {
+ continue;
+ }
+
+ into.add(part);
+ }
+ }
+ }
+ }
+ }
+
+ public void getEntitiesWithEnderDragonParts(final Entity except, final Class<?> clazz, final AABB box, final List<Entity> into,
+ final Predicate<? super Entity> predicate) {
+ if (this.count == 0) {
+ return;
+ }
+
+ final int minSection = this.manager.minSection;
+ final int maxSection = this.manager.maxSection;
+
+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection);
+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection);
+
+ final BasicEntityList<Entity>[] entitiesBySection = this.entitiesBySection;
+
+ for (int section = min; section <= max; ++section) {
+ final BasicEntityList<Entity> list = entitiesBySection[section - minSection];
+
+ if (list == null) {
+ continue;
+ }
+
+ final Entity[] storage = list.storage;
+
+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) {
+ final Entity entity = storage[i];
+
+ if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) {
+ continue;
+ }
+
+ if (predicate == null || predicate.test(entity)) {
+ into.add(entity);
+ } // else: continue to test the ender dragon parts
+
+ if (entity instanceof EnderDragon) {
+ for (final EnderDragonPart part : ((EnderDragon)entity).subEntities) {
+ if (part == except || !part.getBoundingBox().intersects(box) || !clazz.isInstance(part)) {
+ continue;
+ }
+
+ if (predicate != null && !predicate.test(part)) {
+ continue;
+ }
+
+ into.add(part);
+ }
+ }
+ }
+ }
+ }
+
+ public <T extends Entity> void getEntities(final EntityType<?> type, final AABB box, final List<? super T> into,
+ final Predicate<? super T> predicate) {
+ if (this.count == 0) {
+ return;
+ }
+
+ final int minSection = this.manager.minSection;
+ final int maxSection = this.manager.maxSection;
+
+ final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection);
+ final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection);
+
+ final BasicEntityList<Entity>[] entitiesBySection = this.entitiesBySection;
+
+ for (int section = min; section <= max; ++section) {
+ final BasicEntityList<Entity> list = entitiesBySection[section - minSection];
+
+ if (list == null) {
+ continue;
+ }
+
+ final Entity[] storage = list.storage;
+
+ for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) {
+ final Entity entity = storage[i];
+
+ if (entity == null || (type != null && entity.getType() != type) || !entity.getBoundingBox().intersects(box)) {
+ continue;
+ }
+
+ if (predicate != null && !predicate.test((T)entity)) {
+ continue;
+ }
+
+ into.add((T)entity);
+ }
+ }
+ }
+ }
+}
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
index 9b96d05094c3b83f6388d479fdca8800453ccd1d..b5b10c57401e1b27175b1960839a81382d89b73f 100644
--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
@@ -89,6 +89,28 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
private float averageSentPackets;
private int tickCount;
private boolean handlingFault;
+ // Paper start - add pending task queue
+ private final Queue<Runnable> pendingTasks = new java.util.concurrent.ConcurrentLinkedQueue<>();
+ public void execute(final Runnable run) {
+ if (this.channel == null || !this.channel.isRegistered()) {
+ run.run();
+ return;
+ }
+ final boolean queue = !this.queue.isEmpty();
+ if (!queue) {
+ this.channel.eventLoop().execute(run);
+ } else {
+ this.pendingTasks.add(run);
+ if (this.queue.isEmpty()) {
+ // something flushed async, dump tasks now
+ Runnable r;
+ while ((r = this.pendingTasks.poll()) != null) {
+ this.channel.eventLoop().execute(r);
+ }
+ }
+ }
+ }
+ // Paper end - add pending task queue
public Connection(PacketFlow side) {
this.receiving = side;
@@ -247,6 +269,7 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
}
private void flushQueue() {
+ try { // Paper - add pending task queue
if (this.channel != null && this.channel.isOpen()) {
Queue queue = this.queue;
@@ -259,6 +282,12 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
}
}
+ } finally { // Paper start - add pending task queue
+ Runnable r;
+ while ((r = this.pendingTasks.poll()) != null) {
+ this.channel.eventLoop().execute(r);
+ }
+ } // Paper end - add pending task queue
}
public void tick() {
diff --git a/src/main/java/net/minecraft/network/protocol/game/ServerboundCommandSuggestionPacket.java b/src/main/java/net/minecraft/network/protocol/game/ServerboundCommandSuggestionPacket.java
index a5e438a834826161c52ca9db57d234d9ff80a591..b8bc1b9b8e8a33df90a963f9f9769292bf595642 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ServerboundCommandSuggestionPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ServerboundCommandSuggestionPacket.java
@@ -14,7 +14,7 @@ public class ServerboundCommandSuggestionPacket implements Packet<ServerGamePack
public ServerboundCommandSuggestionPacket(FriendlyByteBuf buf) {
this.id = buf.readVarInt();
- this.command = buf.readUtf(32500);
+ this.command = buf.readUtf(2048);
}
@Override
diff --git a/src/main/java/net/minecraft/server/ChunkSystem.java b/src/main/java/net/minecraft/server/ChunkSystem.java
index c59fca05484c30b28e883f5b5dde0362f294b517..0c6534e64ef023cf613f2c5407c7598c6ed81bc6 100644
--- a/src/main/java/net/minecraft/server/ChunkSystem.java
+++ b/src/main/java/net/minecraft/server/ChunkSystem.java
@@ -31,191 +31,41 @@ public final class ChunkSystem {
}
public static void scheduleChunkTask(final ServerLevel level, final int chunkX, final int chunkZ, final Runnable run, final PrioritisedExecutor.Priority priority) {
- level.chunkSource.mainThreadProcessor.execute(run);
+ level.chunkTaskScheduler.scheduleChunkTask(chunkX, chunkZ, run, priority); // Paper - rewrite chunk system
}
public static void scheduleChunkLoad(final ServerLevel level, final int chunkX, final int chunkZ, final boolean gen,
final ChunkStatus toStatus, final boolean addTicket, final PrioritisedExecutor.Priority priority,
final Consumer<ChunkAccess> onComplete) {
- if (gen) {
- scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
- return;
- }
- scheduleChunkLoad(level, chunkX, chunkZ, ChunkStatus.EMPTY, addTicket, priority, (final ChunkAccess chunk) -> {
- if (chunk == null) {
- onComplete.accept(null);
- } else {
- if (chunk.getStatus().isOrAfter(toStatus)) {
- scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
- } else {
- onComplete.accept(null);
- }
- }
- });
+ level.chunkTaskScheduler.scheduleChunkLoad(chunkX, chunkZ, gen, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system
}
- static final TicketType<Long> CHUNK_LOAD = TicketType.create("chunk_load", Long::compareTo);
-
- private static long chunkLoadCounter = 0L;
+ // Paper - rewrite chunk system
public static void scheduleChunkLoad(final ServerLevel level, final int chunkX, final int chunkZ, final ChunkStatus toStatus,
final boolean addTicket, final PrioritisedExecutor.Priority priority, final Consumer<ChunkAccess> onComplete) {
- if (!Bukkit.isPrimaryThread()) {
- scheduleChunkTask(level, chunkX, chunkZ, () -> {
- scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
- }, priority);
- return;
- }
-
- final int minLevel = 33 + ChunkStatus.getDistance(toStatus);
- final Long chunkReference = addTicket ? Long.valueOf(++chunkLoadCounter) : null;
- final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ);
-
- if (addTicket) {
- level.chunkSource.addTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference);
- }
- level.chunkSource.runDistanceManagerUpdates();
-
- final Consumer<ChunkAccess> loadCallback = (final ChunkAccess chunk) -> {
- try {
- if (onComplete != null) {
- onComplete.accept(chunk);
- }
- } catch (final ThreadDeath death) {
- throw death;
- } catch (final Throwable thr) {
- LOGGER.error("Exception handling chunk load callback", thr);
- SneakyThrow.sneaky(thr);
- } finally {
- if (addTicket) {
- level.chunkSource.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, minLevel, chunkPos);
- level.chunkSource.removeTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference);
- }
- }
- };
-
- final ChunkHolder holder = level.chunkSource.chunkMap.getUpdatingChunkIfPresent(CoordinateUtils.getChunkKey(chunkX, chunkZ));
-
- if (holder == null || holder.getTicketLevel() > minLevel) {
- loadCallback.accept(null);
- return;
- }
-
- final CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> loadFuture = holder.getOrScheduleFuture(toStatus, level.chunkSource.chunkMap);
-
- if (loadFuture.isDone()) {
- loadCallback.accept(loadFuture.join().left().orElse(null));
- return;
- }
-
- loadFuture.whenCompleteAsync((final Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either, final Throwable thr) -> {
- if (thr != null) {
- loadCallback.accept(null);
- return;
- }
- loadCallback.accept(either.left().orElse(null));
- }, (final Runnable r) -> {
- scheduleChunkTask(level, chunkX, chunkZ, r, PrioritisedExecutor.Priority.HIGHEST);
- });
+ level.chunkTaskScheduler.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system
}
public static void scheduleTickingState(final ServerLevel level, final int chunkX, final int chunkZ,
final ChunkHolder.FullChunkStatus toStatus, final boolean addTicket,
final PrioritisedExecutor.Priority priority, final Consumer<LevelChunk> onComplete) {
- if (toStatus == ChunkHolder.FullChunkStatus.INACCESSIBLE) {
- throw new IllegalArgumentException("Cannot wait for INACCESSIBLE status");
- }
-
- if (!Bukkit.isPrimaryThread()) {
- scheduleChunkTask(level, chunkX, chunkZ, () -> {
- scheduleTickingState(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
- }, priority);
- return;
- }
-
- final int minLevel = 33 - (toStatus.ordinal() - 1);
- final int radius = toStatus.ordinal() - 1;
- final Long chunkReference = addTicket ? Long.valueOf(++chunkLoadCounter) : null;
- final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ);
-
- if (addTicket) {
- level.chunkSource.addTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference);
- }
- level.chunkSource.runDistanceManagerUpdates();
-
- final Consumer<LevelChunk> loadCallback = (final LevelChunk chunk) -> {
- try {
- if (onComplete != null) {
- onComplete.accept(chunk);
- }
- } catch (final ThreadDeath death) {
- throw death;
- } catch (final Throwable thr) {
- LOGGER.error("Exception handling chunk load callback", thr);
- SneakyThrow.sneaky(thr);
- } finally {
- if (addTicket) {
- level.chunkSource.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, minLevel, chunkPos);
- level.chunkSource.removeTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference);
- }
- }
- };
-
- final ChunkHolder holder = level.chunkSource.chunkMap.getUpdatingChunkIfPresent(CoordinateUtils.getChunkKey(chunkX, chunkZ));
-
- if (holder == null || holder.getTicketLevel() > minLevel) {
- loadCallback.accept(null);
- return;
- }
-
- final CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> tickingState;
- switch (toStatus) {
- case BORDER: {
- tickingState = holder.getFullChunkFuture();
- break;
- }
- case TICKING: {
- tickingState = holder.getTickingChunkFuture();
- break;
- }
- case ENTITY_TICKING: {
- tickingState = holder.getEntityTickingChunkFuture();
- break;
- }
- default: {
- throw new IllegalStateException("Cannot reach here");
- }
- }
-
- if (tickingState.isDone()) {
- loadCallback.accept(tickingState.join().left().orElse(null));
- return;
- }
-
- tickingState.whenCompleteAsync((final Either<LevelChunk, ChunkHolder.ChunkLoadingFailure> either, final Throwable thr) -> {
- if (thr != null) {
- loadCallback.accept(null);
- return;
- }
- loadCallback.accept(either.left().orElse(null));
- }, (final Runnable r) -> {
- scheduleChunkTask(level, chunkX, chunkZ, r, PrioritisedExecutor.Priority.HIGHEST);
- });
+ level.chunkTaskScheduler.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system
}
public static List<ChunkHolder> getVisibleChunkHolders(final ServerLevel level) {
- return new ArrayList<>(level.chunkSource.chunkMap.visibleChunkMap.values());
+ return level.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders(); // Paper - rewrite chunk system
}
public static List<ChunkHolder> getUpdatingChunkHolders(final ServerLevel level) {
- return new ArrayList<>(level.chunkSource.chunkMap.updatingChunkMap.values());
+ return level.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders(); // Paper - rewrite chunk system
}
public static int getVisibleChunkHolderCount(final ServerLevel level) {
- return level.chunkSource.chunkMap.visibleChunkMap.size();
+ return level.chunkTaskScheduler.chunkHolderManager.size(); // Paper - rewrite chunk system
}
public static int getUpdatingChunkHolderCount(final ServerLevel level) {
- return level.chunkSource.chunkMap.updatingChunkMap.size();
+ return level.chunkTaskScheduler.chunkHolderManager.size(); // Paper - rewrite chunk system
}
public static boolean hasAnyChunkHolders(final ServerLevel level) {
@@ -269,23 +119,15 @@ public final class ChunkSystem {
}
public static int getSendViewDistance(final ServerPlayer player) {
- return getLoadViewDistance(player);
+ return io.papermc.paper.chunk.PlayerChunkLoader.getSendViewDistance(player);
}
public static int getLoadViewDistance(final ServerPlayer player) {
- final ServerLevel level = player.getLevel();
- if (level == null) {
- return Bukkit.getViewDistance() + 1;
- }
- return level.chunkSource.chunkMap.getEffectiveViewDistance() + 1;
+ return io.papermc.paper.chunk.PlayerChunkLoader.getLoadViewDistance(player);
}
public static int getTickViewDistance(final ServerPlayer player) {
- final ServerLevel level = player.getLevel();
- if (level == null) {
- return Bukkit.getSimulationDistance();
- }
- return level.chunkSource.chunkMap.distanceManager.getSimulationDistance();
+ return io.papermc.paper.chunk.PlayerChunkLoader.getTickViewDistance(player);
}
private ChunkSystem() {
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
index 9db975e84609956b2206076e30f17a350adb77d6..f99929c0c5652dedf94b7e34ba599cedf5daf508 100644
--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -1,15 +1,28 @@
package net.minecraft.server;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import com.google.gson.internal.Streams;
+import com.google.gson.stream.JsonWriter;
+import com.mojang.datafixers.util.Either;
import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet;
import java.lang.ref.Cleaner;
+import it.unimi.dsi.fastutil.objects.ReferenceArrayList;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ChunkMap;
+import net.minecraft.server.level.DistanceManager;
import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.Ticket;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.level.ChunkPos;
import net.minecraft.world.level.ClipContext;
import net.minecraft.world.level.Level;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.bukkit.Location;
import org.bukkit.block.BlockFace;
@@ -19,8 +32,11 @@ import org.spigotmc.AsyncCatcher;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Queue;
+import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.LinkedBlockingQueue;
@@ -505,6 +521,100 @@ public final class MCUtil {
}
}
+ public static ChunkStatus getChunkStatus(ChunkHolder chunk) {
+ return chunk.getChunkHolderStatus();
+ }
+
+ public static void dumpChunks(File file, boolean watchdog) throws IOException {
+ file.getParentFile().mkdirs();
+ file.createNewFile();
+ ReferenceArrayList<org.bukkit.World> worlds = new ReferenceArrayList<>(org.bukkit.Bukkit.getWorlds());
+ ReferenceArrayList<org.bukkit.World> loadedWorlds = new ReferenceArrayList<>(worlds);
+ JsonObject data = new JsonObject();
+
+ data.addProperty("server-version", org.bukkit.Bukkit.getVersion());
+ data.addProperty("data-version", 1);
+
+ {
+ JsonArray players = new JsonArray();
+ data.add("all-players", players);
+ List<ServerPlayer> playerList = MinecraftServer.getServer().getPlayerList().players;
+ for (ServerPlayer player : playerList) {
+ JsonObject playerData = new JsonObject();
+ players.add(playerData);
+
+ Level playerWorld = player.getLevel();
+ org.bukkit.World craftWorld = playerWorld.getWorld();
+ Entity.RemovalReason removalReason = player.getRemovalReason();
+
+ playerData.addProperty("name", player.getScoreboardName());
+ playerData.addProperty("x", player.getX());
+ playerData.addProperty("y", player.getY());
+ playerData.addProperty("z", player.getZ());
+ playerData.addProperty("world", playerWorld == null ? "null world" : craftWorld.getName());
+ playerData.addProperty("removalReason", removalReason == null ? "null" : removalReason.name());
+
+ if (!worlds.contains(craftWorld)) {
+ worlds.add(craftWorld);
+ }
+ }
+ }
+
+ JsonArray chunkWaitInformation = new JsonArray();
+ data.add("chunk-wait-infos", chunkWaitInformation);
+
+ for (io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.ChunkInfo chunkInfo : io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.getChunkInfos()) {
+ chunkWaitInformation.add(chunkInfo.toString());
+ }
+
+ JsonArray worldsData = new JsonArray();
+
+ for (org.bukkit.World bukkitWorld : worlds) {
+ JsonObject worldData = new JsonObject();
+
+ ServerLevel world = ((org.bukkit.craftbukkit.CraftWorld)bukkitWorld).getHandle();
+ List<ServerPlayer> players = world.players;
+
+ worldData.addProperty("is-loaded", loadedWorlds.contains(bukkitWorld));
+ worldData.addProperty("name", world.getWorld().getName());
+ worldData.addProperty("view-distance", world.getChunkSource().chunkMap.playerChunkManager.getTargetNoTickViewDistance()); // Paper - replace chunk loader system
+ worldData.addProperty("tick-view-distance", world.getChunkSource().chunkMap.playerChunkManager.getTargetTickViewDistance()); // Paper - replace chunk loader system
+ worldData.addProperty("keep-spawn-loaded", world.keepSpawnInMemory);
+ worldData.addProperty("keep-spawn-loaded-range", world.paperConfig().spawn.keepSpawnLoadedRange * 16);
+
+ JsonArray playersData = new JsonArray();
+
+ for (ServerPlayer player : players) {
+ JsonObject playerData = new JsonObject();
+
+ playerData.addProperty("name", player.getScoreboardName());
+ playerData.addProperty("x", player.getX());
+ playerData.addProperty("y", player.getY());
+ playerData.addProperty("z", player.getZ());
+
+ playersData.add(playerData);
+ }
+
+ worldData.add("players", playersData);
+ worldData.add("chunk-data", watchdog ? world.chunkTaskScheduler.chunkHolderManager.getDebugJsonForWatchdog() : world.chunkTaskScheduler.chunkHolderManager.getDebugJson());
+ worldsData.add(worldData);
+ }
+
+ data.add("worlds", worldsData);
+
+ StringWriter stringWriter = new StringWriter();
+ JsonWriter jsonWriter = new JsonWriter(stringWriter);
+ jsonWriter.setIndent(" ");
+ jsonWriter.setLenient(false);
+ Streams.write(data, jsonWriter);
+
+ String fileData = stringWriter.toString();
+
+ try (PrintStream out = new PrintStream(new FileOutputStream(file), false, StandardCharsets.UTF_8)) {
+ out.print(fileData);
+ }
+ }
+
public static int getTicketLevelFor(net.minecraft.world.level.chunk.ChunkStatus status) {
return net.minecraft.server.level.ChunkMap.MAX_VIEW_DISTANCE + net.minecraft.world.level.chunk.ChunkStatus.getDistance(status);
}
diff --git a/src/main/java/net/minecraft/server/Main.java b/src/main/java/net/minecraft/server/Main.java
index 4dd3af1416cbdad330365a19ad664079f3598c15..45db9f1b1d19319e7f92bd4e61be9ea9b06dd5e5 100644
--- a/src/main/java/net/minecraft/server/Main.java
+++ b/src/main/java/net/minecraft/server/Main.java
@@ -262,6 +262,7 @@ public class Main {
convertable_conversionsession.saveDataTag(iregistrycustom_dimension, savedata);
*/
+ Class.forName(net.minecraft.world.entity.npc.VillagerTrades.class.getName());// Paper - load this sync so it won't fail later async
final DedicatedServer dedicatedserver = (DedicatedServer) MinecraftServer.spin((thread) -> {
DedicatedServer dedicatedserver1 = new DedicatedServer(optionset, config.get(), ops.get(), thread, convertable_conversionsession, resourcepackrepository, worldstem, dedicatedserversettings, DataFixers.getDataFixer(), services, LoggerChunkProgressListener::new);
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 53be6189d3fa6a65a09996683913fbbf5133dcb7..317cd6f68c2368b2f70dfb809db3e418de040f05 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -287,7 +287,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
public static <S extends MinecraftServer> S spin(Function<Thread, S> serverFactory) {
AtomicReference<S> atomicreference = new AtomicReference();
- Thread thread = new Thread(() -> {
+ Thread thread = new io.papermc.paper.util.TickThread(() -> { // Paper - rewrite chunk system
((MinecraftServer) atomicreference.get()).runServer();
}, "Server thread");
@@ -576,7 +576,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
this.forceDifficulty();
for (ServerLevel worldserver : this.getAllLevels()) {
this.prepareLevels(worldserver.getChunkSource().chunkMap.progressListener, worldserver);
- worldserver.entityManager.tick(); // SPIGOT-6526: Load pending entities so they are available to the API
+ //worldserver.entityManager.tick(); // SPIGOT-6526: Load pending entities so they are available to the API // Paper - rewrite chunk system, not required to "tick" anything
this.server.getPluginManager().callEvent(new org.bukkit.event.world.WorldLoadEvent(worldserver.getWorld()));
}
@@ -776,6 +776,12 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
public abstract boolean shouldRconBroadcast();
public boolean saveAllChunks(boolean suppressLogs, boolean flush, boolean force) {
+ // Paper start - rewrite chunk system - add close param
+ // This allows us to avoid double saving chunks by closing instead of saving then closing
+ return this.saveAllChunks(suppressLogs, flush, force, false);
+ }
+ public boolean saveAllChunks(boolean suppressLogs, boolean flush, boolean force, boolean close) {
+ // Paper end - rewrite chunk system - add close param
boolean flag3 = false;
for (Iterator iterator = this.getAllLevels().iterator(); iterator.hasNext(); flag3 = true) {
@@ -784,8 +790,12 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
if (!suppressLogs) {
MinecraftServer.LOGGER.info("Saving chunks for level '{}'/{}", worldserver, worldserver.dimension().location());
}
-
- worldserver.save((ProgressListener) null, flush, worldserver.noSave && !force);
+ // Paper start - rewrite chunk system
+ worldserver.save((ProgressListener) null, flush, worldserver.noSave && !force, close);
+ if (flush) {
+ MinecraftServer.LOGGER.info("ThreadedAnvilChunkStorage ({}): All chunks are saved", worldserver.getChunkSource().chunkMap.getStorageName());
+ }
+ // Paper end - rewrite chunk system
}
// CraftBukkit start - moved to WorldServer.save
@@ -804,7 +814,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
while (iterator1.hasNext()) {
ServerLevel worldserver2 = (ServerLevel) iterator1.next();
- MinecraftServer.LOGGER.info("ThreadedAnvilChunkStorage ({}): All chunks are saved", worldserver2.getChunkSource().chunkMap.getStorageName());
+ //MinecraftServer.LOGGER.info("ThreadedAnvilChunkStorage ({}): All chunks are saved", worldserver2.getChunkSource().chunkMap.getStorageName()); // Paper - move up
}
MinecraftServer.LOGGER.info("ThreadedAnvilChunkStorage: All dimensions are saved");
@@ -884,36 +894,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
}
- while (this.levels.values().stream().anyMatch((worldserver1) -> {
- return worldserver1.getChunkSource().chunkMap.hasWork();
- })) {
- this.nextTickTime = Util.getMillis() + 1L;
- iterator = this.getAllLevels().iterator();
-
- while (iterator.hasNext()) {
- worldserver = (ServerLevel) iterator.next();
- worldserver.getChunkSource().removeTicketsOnClosing();
- worldserver.getChunkSource().tick(() -> {
- return true;
- }, false);
- }
-
- this.waitUntilNextTick();
- }
-
- this.saveAllChunks(false, true, false);
- iterator = this.getAllLevels().iterator();
-
- while (iterator.hasNext()) {
- worldserver = (ServerLevel) iterator.next();
- if (worldserver != null) {
- try {
- worldserver.close();
- } catch (IOException ioexception) {
- MinecraftServer.LOGGER.error("Exception closing the level", ioexception);
- }
- }
- }
+ this.saveAllChunks(false, true, false, true); // Paper - rewrite chunk system - move closing into here
this.isSaving = false;
this.resources.close();
@@ -932,7 +913,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
this.getProfileCache().save();
}
// Spigot end
-
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.close(true); // Paper // Paper - rewrite chunk system
}
public String getLocalIp() {
@@ -966,6 +947,8 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
// Spigot End
+ public static volatile RuntimeException chunkSystemCrash; // Paper - rewrite chunk system
+
protected void runServer() {
try {
if (!this.initServer()) {
@@ -983,6 +966,12 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
Arrays.fill( recentTps, 20 );
long curTime, tickSection = Util.getMillis(), tickCount = 1;
while (this.running) {
+ // Paper start - rewrite chunk system
+ // guarantee that nothing can stop the server from halting if it can at least still tick
+ if (this.chunkSystemCrash != null) {
+ throw this.chunkSystemCrash;
+ }
+ // Paper end - rewrite chunk system
long i = (curTime = Util.getMillis()) - this.nextTickTime;
if (i > 5000L && this.nextTickTime - this.lastOverloadWarning >= 30000L) { // CraftBukkit
@@ -1095,6 +1084,11 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
private boolean haveTime() {
+ // Paper start
+ if (this.forceTicks) {
+ return true;
+ }
+ // Paper end
// CraftBukkit start
if (isOversleep) return canOversleep();// Paper - because of our changes, this logic is broken
return this.forceTicks || this.runningTask() || Util.getMillis() < (this.mayHaveDelayedTasks ? this.delayedTasksMaxNextTickTime : this.nextTickTime);
@@ -2215,7 +2209,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
// CraftBukkit start
@Override
public boolean isSameThread() {
- return super.isSameThread() || this.isStopped(); // CraftBukkit - MC-142590
+ return io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system
}
public boolean isDebugging() {
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index c905602d23cdf3af1de7ab4419f11856b07da2ba..fa1ab9974859c75075f3090e36e0de58dda3e8e6 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -406,7 +406,34 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
return this.getProperties().allowNether;
}
+ static final java.util.concurrent.atomic.AtomicInteger ASYNC_DEBUG_CHUNKS_COUNT = new java.util.concurrent.atomic.AtomicInteger(); // Paper - rewrite chunk system
+
public void handleConsoleInput(String command, CommandSourceStack commandSource) {
+ // Paper start - rewrite chunk system
+ if (command.equalsIgnoreCase("paper debug chunks --async")) {
+ LOGGER.info("Scheduling async debug chunks");
+ Runnable run = () -> {
+ LOGGER.info("Async debug chunks executing");
+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(false);
+ CommandSender sender = MinecraftServer.getServer().console;
+ java.io.File file = new java.io.File(new java.io.File(new java.io.File("."), "debug"),
+ "chunks-" + java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(java.time.LocalDateTime.now()) + ".txt");
+ sender.sendMessage(net.kyori.adventure.text.Component.text("Writing chunk information dump to " + file, net.kyori.adventure.text.format.NamedTextColor.GREEN));
+ try {
+ net.minecraft.server.MCUtil.dumpChunks(file, true);
+ sender.sendMessage(net.kyori.adventure.text.Component.text("Successfully written chunk information!", net.kyori.adventure.text.format.NamedTextColor.GREEN));
+ } catch (Throwable thr) {
+ MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr);
+ sender.sendMessage(net.kyori.adventure.text.Component.text("Failed to dump chunk information, see console", net.kyori.adventure.text.format.NamedTextColor.RED));
+ }
+ };
+ Thread t = new Thread(run);
+ t.setName("Async debug thread #" + ASYNC_DEBUG_CHUNKS_COUNT.getAndIncrement());
+ t.setDaemon(true);
+ t.start();
+ return;
+ }
+ // Paper end - rewrite chunk system
this.consoleInput.add(new ConsoleInput(command, commandSource));
}
diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java
index 86c33f029ae56fcace51b69763202be9f8bc5f44..2ba3bb4e5670ece798a8882801a856d82851c00a 100644
--- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
@@ -50,17 +50,12 @@ public class ChunkHolder {
private static final List<ChunkStatus> CHUNK_STATUSES = ChunkStatus.getStatusList();
private static final ChunkHolder.FullChunkStatus[] FULL_CHUNK_STATUSES = ChunkHolder.FullChunkStatus.values();
private static final int BLOCKS_BEFORE_RESEND_FUDGE = 64;
- private final AtomicReferenceArray<CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>>> futures;
+ // Paper - rewrite chunk system
private final LevelHeightAccessor levelHeightAccessor;
- private volatile CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> fullChunkFuture; private int fullChunkCreateCount; private volatile boolean isFullChunkReady; // Paper - cache chunk ticking stage
- private volatile CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> tickingChunkFuture; private volatile boolean isTickingReady; // Paper - cache chunk ticking stage
- private volatile CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> entityTickingChunkFuture; private volatile boolean isEntityTickingReady; // Paper - cache chunk ticking stage
- public CompletableFuture<ChunkAccess> chunkToSave; // Paper - public
+ // Paper - rewrite chunk system
@Nullable
private final DebugBuffer<ChunkHolder.ChunkSaveDebug> chunkToSaveHistory;
- public int oldTicketLevel;
- private int ticketLevel;
- private int queueLevel;
+ // Paper - rewrite chunk system
public final ChunkPos pos;
private boolean hasChangedSections;
private final ShortSet[] changedBlocksPerSection;
@@ -69,11 +64,22 @@ public class ChunkHolder {
private final LevelLightEngine lightEngine;
private final ChunkHolder.LevelChangeListener onLevelChange;
public final ChunkHolder.PlayerProvider playerProvider;
- private boolean wasAccessibleSinceLastSave;
+ // Paper - rewrite chunk system
private boolean resendLight;
- private CompletableFuture<Void> pendingFullStateConfirmation;
+ // Paper - rewrite chunk system
private final ChunkMap chunkMap; // Paper
+ // Paper start - no-tick view distance
+ public final LevelChunk getSendingChunk() {
+ // it's important that we use getChunkAtIfLoadedImmediately to mirror the chunk sending logic used
+ // in Chunk's neighbour callback
+ LevelChunk ret = this.chunkMap.level.getChunkSource().getChunkAtIfLoadedImmediately(this.pos.x, this.pos.z);
+ if (ret != null && ret.areNeighboursLoaded(1)) {
+ return ret;
+ }
+ return null;
+ }
+ // Paper end - no-tick view distance
// Paper start
public void onChunkAdd() {
@@ -85,148 +91,106 @@ public class ChunkHolder {
}
// Paper end
- public ChunkHolder(ChunkPos pos, int level, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.LevelChangeListener levelUpdateListener, ChunkHolder.PlayerProvider playersWatchingChunkProvider) {
- this.futures = new AtomicReferenceArray(ChunkHolder.CHUNK_STATUSES.size());
- this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
- this.tickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
- this.entityTickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
- this.chunkToSave = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error
+ public final io.papermc.paper.chunk.system.scheduling.NewChunkHolder newChunkHolder; // Paper - rewrite chunk system
+
+ public ChunkHolder(ChunkPos pos, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.PlayerProvider playersWatchingChunkProvider, io.papermc.paper.chunk.system.scheduling.NewChunkHolder newChunkHolder) { // Paper - rewrite chunk system
+ this.newChunkHolder = newChunkHolder; // Paper - rewrite chunk system
this.chunkToSaveHistory = null;
this.blockChangedLightSectionFilter = new BitSet();
this.skyChangedLightSectionFilter = new BitSet();
- this.pendingFullStateConfirmation = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error
+ // Paper - rewrite chunk system
this.pos = pos;
this.levelHeightAccessor = world;
this.lightEngine = lightingProvider;
- this.onLevelChange = levelUpdateListener;
+ this.onLevelChange = null; // Paper - rewrite chunk system
this.playerProvider = playersWatchingChunkProvider;
- this.oldTicketLevel = ChunkMap.MAX_CHUNK_DISTANCE + 1;
- this.ticketLevel = this.oldTicketLevel;
- this.queueLevel = this.oldTicketLevel;
- this.setTicketLevel(level);
+ // Paper - rewrite chunk system
this.changedBlocksPerSection = new ShortSet[world.getSectionsCount()];
this.chunkMap = (ChunkMap)playersWatchingChunkProvider; // Paper
}
// Paper start
public @Nullable ChunkAccess getAvailableChunkNow() {
- // TODO can we just getStatusFuture(EMPTY)?
- for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getParent(); curr != next; curr = next, next = next.getParent()) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> future = this.getFutureIfPresentUnchecked(curr);
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = future.getNow(null);
- if (either == null || either.left().isEmpty()) {
- continue;
- }
- return either.left().get();
- }
- return null;
+ return this.newChunkHolder.getCurrentChunk(); // Paper - rewrite chunk system
}
// Paper end
// CraftBukkit start
public LevelChunk getFullChunkNow() {
- // Note: We use the oldTicketLevel for isLoaded checks.
- if (!ChunkHolder.getFullChunkStatus(this.oldTicketLevel).isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) return null;
- return this.getFullChunkNowUnchecked();
+ // Paper start - rewrite chunk system
+ ChunkAccess chunk = this.getAvailableChunkNow();
+ if (!this.isFullChunkReady() || !(chunk instanceof LevelChunk)) return null; // instanceof to avoid a race condition on off-main threads
+ return (LevelChunk)chunk;
+ // Paper end - rewrite chunk system
}
public LevelChunk getFullChunkNowUnchecked() {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> statusFuture = this.getFutureIfPresentUnchecked(ChunkStatus.FULL);
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = (Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>) statusFuture.getNow(null);
- return (either == null) ? null : (LevelChunk) either.left().orElse(null);
+ // Paper start - rewrite chunk system
+ ChunkAccess chunk = this.getAvailableChunkNow();
+ return chunk instanceof LevelChunk ? (LevelChunk)chunk : null;
+ // Paper end - rewrite chunk system
}
// CraftBukkit end
public CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getFutureIfPresentUnchecked(ChunkStatus leastStatus) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = (CompletableFuture) this.futures.get(leastStatus.getIndex());
-
- return completablefuture == null ? ChunkHolder.UNLOADED_CHUNK_FUTURE : completablefuture;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getFutureIfPresent(ChunkStatus leastStatus) {
- return ChunkHolder.getStatus(this.ticketLevel).isOrAfter(leastStatus) ? this.getFutureIfPresentUnchecked(leastStatus) : ChunkHolder.UNLOADED_CHUNK_FUTURE;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public final CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> getTickingChunkFuture() { // Paper - final for inline
- return this.tickingChunkFuture;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public final CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> getEntityTickingChunkFuture() { // Paper - final for inline
- return this.entityTickingChunkFuture;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public final CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> getFullChunkFuture() { // Paper - final for inline
- return this.fullChunkFuture;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
@Nullable
public final LevelChunk getTickingChunk() { // Paper - final for inline
- CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getTickingChunkFuture();
- Either<LevelChunk, ChunkHolder.ChunkLoadingFailure> either = (Either) completablefuture.getNow(null); // CraftBukkit - decompile error
-
- return either == null ? null : (LevelChunk) either.left().orElse(null); // CraftBukkit - decompile error
+ // Paper start - rewrite chunk system
+ if (!this.isTickingReady()) {
+ return null;
+ }
+ return (LevelChunk)this.getAvailableChunkNow();
+ // Paper end - rewrite chunk system
}
@Nullable
public final LevelChunk getFullChunk() { // Paper - final for inline
- CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getFullChunkFuture();
- Either<LevelChunk, ChunkHolder.ChunkLoadingFailure> either = (Either) completablefuture.getNow(null); // CraftBukkit - decompile error
-
- return either == null ? null : (LevelChunk) either.left().orElse(null); // CraftBukkit - decompile error
+ // Paper start - rewrite chunk system
+ if (!this.isFullChunkReady()) {
+ return null;
+ }
+ return (LevelChunk)this.getAvailableChunkNow();
+ // Paper end - rewrite chunk system
}
@Nullable
public ChunkStatus getLastAvailableStatus() {
- for (int i = ChunkHolder.CHUNK_STATUSES.size() - 1; i >= 0; --i) {
- ChunkStatus chunkstatus = (ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i);
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getFutureIfPresentUnchecked(chunkstatus);
-
- if (((Either) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).left().isPresent()) {
- return chunkstatus;
- }
- }
-
- return null;
+ return this.newChunkHolder.getCurrentGenStatus(); // Paper - rewrite chunk system
}
// Paper start
public ChunkStatus getChunkHolderStatus() {
- for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getParent(); curr != next; curr = next, next = next.getParent()) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> future = this.getFutureIfPresentUnchecked(curr);
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = future.getNow(null);
- if (either == null || !either.left().isPresent()) {
- continue;
- }
- return curr;
- }
-
- return null;
+ return this.newChunkHolder.getCurrentGenStatus(); // Paper - rewrite chunk system
}
// Paper end
@Nullable
public ChunkAccess getLastAvailable() {
- for (int i = ChunkHolder.CHUNK_STATUSES.size() - 1; i >= 0; --i) {
- ChunkStatus chunkstatus = (ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i);
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getFutureIfPresentUnchecked(chunkstatus);
-
- if (!completablefuture.isCompletedExceptionally()) {
- Optional<ChunkAccess> optional = ((Either) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).left();
-
- if (optional.isPresent()) {
- return (ChunkAccess) optional.get();
- }
- }
- }
-
- return null;
+ return this.newChunkHolder.getCurrentChunk(); // Paper - rewrite chunk system
}
- public final CompletableFuture<ChunkAccess> getChunkToSave() { // Paper - final for inline
- return this.chunkToSave;
- }
+ // Paper - rewrite chunk system
public void blockChanged(BlockPos pos) {
- LevelChunk chunk = this.getTickingChunk();
+ LevelChunk chunk = this.getSendingChunk(); // Paper - no-tick view distance
if (chunk != null) {
int i = this.levelHeightAccessor.getSectionIndex(pos.getY());
@@ -242,14 +206,15 @@ public class ChunkHolder {
}
public void sectionLightChanged(LightLayer lightType, int y) {
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = (Either) this.getFutureIfPresent(ChunkStatus.FEATURES).getNow(null); // CraftBukkit - decompile error
+ // Paper start - no-tick view distance
- if (either != null) {
- ChunkAccess ichunkaccess = (ChunkAccess) either.left().orElse(null); // CraftBukkit - decompile error
+ if (true) {
+ ChunkAccess ichunkaccess = this.getAvailableChunkNow();
if (ichunkaccess != null) {
ichunkaccess.setUnsaved(true);
- LevelChunk chunk = this.getTickingChunk();
+ LevelChunk chunk = this.getSendingChunk();
+ // Paper end - no-tick view distance
if (chunk != null) {
int j = this.lightEngine.getMinLightSection();
@@ -340,66 +305,32 @@ public class ChunkHolder {
}
public void broadcast(Packet<?> packet, boolean onlyOnWatchDistanceEdge) {
- this.playerProvider.getPlayers(this.pos, onlyOnWatchDistanceEdge).forEach((entityplayer) -> {
- entityplayer.connection.send(packet);
- });
- }
-
- public CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getOrScheduleFuture(ChunkStatus targetStatus, ChunkMap chunkStorage) {
- int i = targetStatus.getIndex();
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = (CompletableFuture) this.futures.get(i);
-
- if (completablefuture != null) {
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = (Either) completablefuture.getNow(ChunkHolder.NOT_DONE_YET);
-
- if (either == null) {
- String s = "value in future for status: " + targetStatus + " was incorrectly set to null at chunk: " + this.pos;
+ // Paper start - per player view distance
+ // there can be potential desync with player's last mapped section and the view distance map, so use the
+ // view distance map here.
+ com.destroystokyo.paper.util.misc.PlayerAreaMap viewDistanceMap = this.chunkMap.playerChunkManager.broadcastMap; // Paper - replace old player chunk manager
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> players = viewDistanceMap.getObjectsInRange(this.pos);
+ if (players == null) {
+ return;
+ }
- throw chunkStorage.debugFuturesAndCreateReportedException(new IllegalStateException("null value previously set for chunk status"), s);
+ Object[] backingSet = players.getBackingSet();
+ for (int i = 0, len = backingSet.length; i < len; ++i) {
+ if (!(backingSet[i] instanceof ServerPlayer player)) {
+ continue;
}
-
- if (either == ChunkHolder.NOT_DONE_YET || either.right().isEmpty()) {
- return completablefuture;
+ if (!this.chunkMap.playerChunkManager.isChunkSent(player, this.pos.x, this.pos.z, onlyOnWatchDistanceEdge)) {
+ continue;
}
+ player.connection.send(packet);
}
-
- if (ChunkHolder.getStatus(this.ticketLevel).isOrAfter(targetStatus)) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture1 = chunkStorage.schedule(this, targetStatus);
-
- this.updateChunkToSave(completablefuture1, "schedule " + targetStatus);
- this.futures.set(i, completablefuture1);
- return completablefuture1;
- } else {
- return completablefuture == null ? ChunkHolder.UNLOADED_CHUNK_FUTURE : completablefuture;
- }
+ // Paper end - per player view distance
}
- protected void addSaveDependency(String thenDesc, CompletableFuture<?> then) {
- if (this.chunkToSaveHistory != null) {
- this.chunkToSaveHistory.push(new ChunkHolder.ChunkSaveDebug(Thread.currentThread(), then, thenDesc));
- }
-
- this.chunkToSave = this.chunkToSave.thenCombine(then, (ichunkaccess, object) -> {
- return ichunkaccess;
- });
- }
-
- private void updateChunkToSave(CompletableFuture<? extends Either<? extends ChunkAccess, ChunkHolder.ChunkLoadingFailure>> then, String thenDesc) {
- if (this.chunkToSaveHistory != null) {
- this.chunkToSaveHistory.push(new ChunkHolder.ChunkSaveDebug(Thread.currentThread(), then, thenDesc));
- }
-
- this.chunkToSave = this.chunkToSave.thenCombine(then, (ichunkaccess, either) -> {
- return (ChunkAccess) either.map((ichunkaccess1) -> {
- return ichunkaccess1;
- }, (playerchunk_failure) -> {
- return ichunkaccess;
- });
- });
- }
+ // Paper - rewrite chunk system
public ChunkHolder.FullChunkStatus getFullStatus() {
- return ChunkHolder.getFullChunkStatus(this.ticketLevel);
+ return this.newChunkHolder.getChunkStatus(); // Paper - rewrite chunk system
}
public final ChunkPos getPos() { // Paper - final for inline
@@ -407,207 +338,10 @@ public class ChunkHolder {
}
public final int getTicketLevel() { // Paper - final for inline
- return this.ticketLevel;
- }
-
- public int getQueueLevel() {
- return this.queueLevel;
- }
-
- private void setQueueLevel(int level) {
- this.queueLevel = level;
- }
-
- public void setTicketLevel(int level) {
- this.ticketLevel = level;
- }
-
- private void scheduleFullChunkPromotion(ChunkMap playerchunkmap, CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> completablefuture, Executor executor, ChunkHolder.FullChunkStatus playerchunk_state) {
- this.pendingFullStateConfirmation.cancel(false);
- CompletableFuture<Void> completablefuture1 = new CompletableFuture();
-
- completablefuture1.thenRunAsync(() -> {
- playerchunkmap.onFullChunkStatusChange(this.pos, playerchunk_state);
- }, executor);
- this.pendingFullStateConfirmation = completablefuture1;
- completablefuture.thenAccept((either) -> {
- either.ifLeft((chunk) -> {
- completablefuture1.complete(null); // CraftBukkit - decompile error
- });
- });
+ return this.newChunkHolder.getTicketLevel(); // Paper - rewrite chunk system
}
- private void demoteFullChunk(ChunkMap playerchunkmap, ChunkHolder.FullChunkStatus playerchunk_state) {
- this.pendingFullStateConfirmation.cancel(false);
- playerchunkmap.onFullChunkStatusChange(this.pos, playerchunk_state);
- }
-
- protected void updateFutures(ChunkMap chunkStorage, Executor executor) {
- ChunkStatus chunkstatus = ChunkHolder.getStatus(this.oldTicketLevel);
- ChunkStatus chunkstatus1 = ChunkHolder.getStatus(this.ticketLevel);
- boolean flag = this.oldTicketLevel <= ChunkMap.MAX_CHUNK_DISTANCE;
- boolean flag1 = this.ticketLevel <= ChunkMap.MAX_CHUNK_DISTANCE;
- ChunkHolder.FullChunkStatus playerchunk_state = ChunkHolder.getFullChunkStatus(this.oldTicketLevel);
- ChunkHolder.FullChunkStatus playerchunk_state1 = ChunkHolder.getFullChunkStatus(this.ticketLevel);
- // CraftBukkit start
- // ChunkUnloadEvent: Called before the chunk is unloaded: isChunkLoaded is still true and chunk can still be modified by plugins.
- if (playerchunk_state.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && !playerchunk_state1.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
- this.getFutureIfPresentUnchecked(ChunkStatus.FULL).thenAccept((either) -> {
- LevelChunk chunk = (LevelChunk)either.left().orElse(null);
- if (chunk != null) {
- chunkStorage.callbackExecutor.execute(() -> {
- // Minecraft will apply the chunks tick lists to the world once the chunk got loaded, and then store the tick
- // lists again inside the chunk once the chunk becomes inaccessible and set the chunk's needsSaving flag.
- // These actions may however happen deferred, so we manually set the needsSaving flag already here.
- chunk.setUnsaved(true);
- chunk.unloadCallback();
- });
- }
- }).exceptionally((throwable) -> {
- // ensure exceptions are printed, by default this is not the case
- MinecraftServer.LOGGER.error("Failed to schedule unload callback for chunk " + ChunkHolder.this.pos, throwable);
- return null;
- });
-
- // Run callback right away if the future was already done
- chunkStorage.callbackExecutor.run();
- }
- // CraftBukkit end
-
- if (flag) {
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = Either.right(new ChunkHolder.ChunkLoadingFailure() {
- public String toString() {
- return "Unloaded ticket level " + ChunkHolder.this.pos;
- }
- });
-
- for (int i = flag1 ? chunkstatus1.getIndex() + 1 : 0; i <= chunkstatus.getIndex(); ++i) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = (CompletableFuture) this.futures.get(i);
-
- if (completablefuture == null) {
- this.futures.set(i, CompletableFuture.completedFuture(either));
- }
- }
- }
-
- boolean flag2 = playerchunk_state.isOrAfter(ChunkHolder.FullChunkStatus.BORDER);
- boolean flag3 = playerchunk_state1.isOrAfter(ChunkHolder.FullChunkStatus.BORDER);
-
- this.wasAccessibleSinceLastSave |= flag3;
- if (!flag2 && flag3) {
- int expectCreateCount = ++this.fullChunkCreateCount; // Paper
- this.fullChunkFuture = chunkStorage.prepareAccessibleChunk(this);
- this.scheduleFullChunkPromotion(chunkStorage, this.fullChunkFuture, executor, ChunkHolder.FullChunkStatus.BORDER);
- // Paper start - cache ticking ready status
- this.fullChunkFuture.thenAccept(either -> {
- final Optional<LevelChunk> left = either.left();
- if (left.isPresent() && ChunkHolder.this.fullChunkCreateCount == expectCreateCount) {
- LevelChunk fullChunk = either.left().get();
- ChunkHolder.this.isFullChunkReady = true;
- net.minecraft.server.ChunkSystem.onChunkBorder(fullChunk, this);
- }
- });
- this.updateChunkToSave(this.fullChunkFuture, "full");
- }
-
- if (flag2 && !flag3) {
- // Paper start
- if (this.isFullChunkReady) {
- net.minecraft.server.ChunkSystem.onChunkNotBorder(this.fullChunkFuture.join().left().get(), this); // Paper
- }
- // Paper end
- this.fullChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK);
- this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
- ++this.fullChunkCreateCount; // Paper - cache ticking ready status
- this.isFullChunkReady = false; // Paper - cache ticking ready status
- }
-
- boolean flag4 = playerchunk_state.isOrAfter(ChunkHolder.FullChunkStatus.TICKING);
- boolean flag5 = playerchunk_state1.isOrAfter(ChunkHolder.FullChunkStatus.TICKING);
-
- if (!flag4 && flag5) {
- this.tickingChunkFuture = chunkStorage.prepareTickingChunk(this);
- this.scheduleFullChunkPromotion(chunkStorage, this.tickingChunkFuture, executor, ChunkHolder.FullChunkStatus.TICKING);
- // Paper start - cache ticking ready status
- this.tickingChunkFuture.thenAccept(either -> {
- either.ifLeft(chunk -> {
- // note: Here is a very good place to add callbacks to logic waiting on this.
- ChunkHolder.this.isTickingReady = true;
- net.minecraft.server.ChunkSystem.onChunkTicking(chunk, this);
- });
- });
- // Paper end
- this.updateChunkToSave(this.tickingChunkFuture, "ticking");
- }
-
- if (flag4 && !flag5) {
- // Paper start
- if (this.isTickingReady) {
- net.minecraft.server.ChunkSystem.onChunkNotTicking(this.tickingChunkFuture.join().left().get(), this); // Paper
- }
- // Paper end
- this.tickingChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); this.isTickingReady = false; // Paper - cache chunk ticking stage
- this.tickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
- }
-
- boolean flag6 = playerchunk_state.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING);
- boolean flag7 = playerchunk_state1.isOrAfter(ChunkHolder.FullChunkStatus.ENTITY_TICKING);
-
- if (!flag6 && flag7) {
- if (this.entityTickingChunkFuture != ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE) {
- throw (IllegalStateException) Util.pauseInIde(new IllegalStateException());
- }
-
- this.entityTickingChunkFuture = chunkStorage.prepareEntityTickingChunk(this.pos);
- this.scheduleFullChunkPromotion(chunkStorage, this.entityTickingChunkFuture, executor, ChunkHolder.FullChunkStatus.ENTITY_TICKING);
- // Paper start - cache ticking ready status
- this.entityTickingChunkFuture.thenAccept(either -> {
- either.ifLeft(chunk -> {
- ChunkHolder.this.isEntityTickingReady = true;
- net.minecraft.server.ChunkSystem.onChunkEntityTicking(chunk, this);
- });
- });
- // Paper end
- this.updateChunkToSave(this.entityTickingChunkFuture, "entity ticking");
- }
-
- if (flag6 && !flag7) {
- // Paper start
- if (this.isEntityTickingReady) {
- net.minecraft.server.ChunkSystem.onChunkNotEntityTicking(this.entityTickingChunkFuture.join().left().get(), this);
- }
- // Paper end
- this.entityTickingChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); this.isEntityTickingReady = false; // Paper - cache chunk ticking stage
- this.entityTickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
- }
-
- if (!playerchunk_state1.isOrAfter(playerchunk_state)) {
- this.demoteFullChunk(chunkStorage, playerchunk_state1);
- }
-
- this.onLevelChange.onLevelChange(this.pos, this::getQueueLevel, this.ticketLevel, this::setQueueLevel);
- this.oldTicketLevel = this.ticketLevel;
- // CraftBukkit start
- // ChunkLoadEvent: Called after the chunk is loaded: isChunkLoaded returns true and chunk is ready to be modified by plugins.
- if (!playerchunk_state.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && playerchunk_state1.isOrAfter(ChunkHolder.FullChunkStatus.BORDER)) {
- this.getFutureIfPresentUnchecked(ChunkStatus.FULL).thenAccept((either) -> {
- LevelChunk chunk = (LevelChunk)either.left().orElse(null);
- if (chunk != null) {
- chunkStorage.callbackExecutor.execute(() -> {
- chunk.loadCallback();
- });
- }
- }).exceptionally((throwable) -> {
- // ensure exceptions are printed, by default this is not the case
- MinecraftServer.LOGGER.error("Failed to schedule load callback for chunk " + ChunkHolder.this.pos, throwable);
- return null;
- });
-
- // Run callback right away if the future was already done
- chunkStorage.callbackExecutor.run();
- }
- // CraftBukkit end
- }
+ // Paper - rewrite chunk system
public static ChunkStatus getStatus(int level) {
return level < 33 ? ChunkStatus.FULL : ChunkStatus.getStatusAroundFullChunk(level - 33);
@@ -617,38 +351,14 @@ public class ChunkHolder {
return ChunkHolder.FULL_CHUNK_STATUSES[Mth.clamp(33 - distance + 1, (int) 0, ChunkHolder.FULL_CHUNK_STATUSES.length - 1)];
}
- public boolean wasAccessibleSinceLastSave() {
- return this.wasAccessibleSinceLastSave;
- }
-
- public void refreshAccessibility() {
- this.wasAccessibleSinceLastSave = ChunkHolder.getFullChunkStatus(this.ticketLevel).isOrAfter(ChunkHolder.FullChunkStatus.BORDER);
- }
+ // Paper - rewrite chunk system
public void replaceProtoChunk(ImposterProtoChunk chunk) {
- for (int i = 0; i < this.futures.length(); ++i) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = (CompletableFuture) this.futures.get(i);
-
- if (completablefuture != null) {
- Optional<ChunkAccess> optional = ((Either) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).left();
-
- if (!optional.isEmpty() && optional.get() instanceof ProtoChunk) {
- this.futures.set(i, CompletableFuture.completedFuture(Either.left(chunk)));
- }
- }
- }
-
- this.updateChunkToSave(CompletableFuture.completedFuture(Either.left(chunk.getWrapped())), "replaceProto");
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public List<Pair<ChunkStatus, CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>>>> getAllFutures() {
- List<Pair<ChunkStatus, CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>>>> list = new ArrayList();
-
- for (int i = 0; i < ChunkHolder.CHUNK_STATUSES.size(); ++i) {
- list.add(Pair.of((ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i), (CompletableFuture) this.futures.get(i)));
- }
-
- return list;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
@FunctionalInterface
@@ -697,15 +407,15 @@ public class ChunkHolder {
// Paper start
public final boolean isEntityTickingReady() {
- return this.isEntityTickingReady;
+ return this.newChunkHolder.isEntityTickingReady(); // Paper - rewrite chunk system
}
public final boolean isTickingReady() {
- return this.isTickingReady;
+ return this.newChunkHolder.isTickingReady(); // Paper - rewrite chunk system
}
public final boolean isFullChunkReady() {
- return this.isFullChunkReady;
+ return this.newChunkHolder.isFullChunkReady(); // Paper - rewrite chunk system
}
// Paper end
}
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index cbd4e749574c55c6e52f42b62dd6da8cfcca97f9..13814643e28e36c72173d0d62b9271a7f6113f6a 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -122,10 +122,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
public static final int MAX_VIEW_DISTANCE = 33;
public static final int MAX_CHUNK_DISTANCE = 33 + ChunkStatus.maxDistance();
public static final int FORCED_TICKET_LEVEL = 31;
- public final Long2ObjectLinkedOpenHashMap<ChunkHolder> updatingChunkMap = new Long2ObjectLinkedOpenHashMap();
- public volatile Long2ObjectLinkedOpenHashMap<ChunkHolder> visibleChunkMap;
- private final Long2ObjectLinkedOpenHashMap<ChunkHolder> pendingUnloads;
- public final LongSet entitiesInLevel;
+ // Paper - rewrite chunk system
public final ServerLevel level;
private final ThreadedLevelLightEngine lightEngine;
public final BlockableEventLoop<Runnable> mainThreadExecutor; // Paper - public
@@ -133,16 +130,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
private RandomState randomState;
public final Supplier<DimensionDataStorage> overworldDataStorage;
private final PoiManager poiManager;
- public final LongSet toDrop;
+ // Paper - rewrite chunk system
private boolean modified;
- private final ChunkTaskPriorityQueueSorter queueSorter;
- private final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> worldgenMailbox;
- public final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> mainThreadMailbox;
+ // Paper - rewrite chunk system
public final ChunkProgressListener progressListener;
private final ChunkStatusUpdateListener chunkStatusListener;
public final ChunkMap.ChunkDistanceManager distanceManager;
private final AtomicInteger tickingGenerated;
- private final StructureTemplateManager structureTemplateManager;
+ public final StructureTemplateManager structureTemplateManager; // Paper - rewrite chunk system
private final String storageName;
private final PlayerMap playerMap;
public final Int2ObjectMap<ChunkMap.TrackedEntity> entityMap;
@@ -151,37 +146,21 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
private final Queue<Runnable> unloadQueue;
int viewDistance;
- // CraftBukkit start - recursion-safe executor for Chunk loadCallback() and unloadCallback()
- public final CallbackExecutor callbackExecutor = new CallbackExecutor();
- public static final class CallbackExecutor implements java.util.concurrent.Executor, Runnable {
-
- private final java.util.Queue<Runnable> queue = new java.util.ArrayDeque<>();
-
- @Override
- public void execute(Runnable runnable) {
- this.queue.add(runnable);
- }
-
- @Override
- public void run() {
- Runnable task;
- while ((task = this.queue.poll()) != null) {
- task.run();
- }
- }
- };
- // CraftBukkit end
+ // Paper - rewrite chunk system
// Paper start - distance maps
private final com.destroystokyo.paper.util.misc.PooledLinkedHashSets<ServerPlayer> pooledLinkedPlayerHashSets = new com.destroystokyo.paper.util.misc.PooledLinkedHashSets<>();
+ public final io.papermc.paper.chunk.PlayerChunkLoader playerChunkManager = new io.papermc.paper.chunk.PlayerChunkLoader(this, this.pooledLinkedPlayerHashSets); // Paper - replace chunk loader
void addPlayerToDistanceMaps(ServerPlayer player) {
+ this.playerChunkManager.addPlayer(player); // Paper - replace chunk loader
int chunkX = MCUtil.getChunkCoordinate(player.getX());
int chunkZ = MCUtil.getChunkCoordinate(player.getZ());
// Note: players need to be explicitly added to distance maps before they can be updated
}
void removePlayerFromDistanceMaps(ServerPlayer player) {
+ this.playerChunkManager.removePlayer(player); // Paper - replace chunk loader
}
@@ -189,6 +168,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
int chunkX = MCUtil.getChunkCoordinate(player.getX());
int chunkZ = MCUtil.getChunkCoordinate(player.getZ());
// Note: players need to be explicitly added to distance maps before they can be updated
+ this.playerChunkManager.updatePlayer(player); // Paper - replace chunk loader
}
// Paper end
// Paper start
@@ -218,16 +198,13 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
public final ChunkHolder getUnloadingChunkHolder(int chunkX, int chunkZ) {
- return this.pendingUnloads.get(io.papermc.paper.util.CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ return null; // Paper - rewrite chunk system
}
// Paper end
public ChunkMap(ServerLevel world, LevelStorageSource.LevelStorageAccess session, DataFixer dataFixer, StructureTemplateManager structureTemplateManager, Executor executor, BlockableEventLoop<Runnable> mainThreadExecutor, LightChunkGetter chunkProvider, ChunkGenerator chunkGenerator, ChunkProgressListener worldGenerationProgressListener, ChunkStatusUpdateListener chunkStatusChangeListener, Supplier<DimensionDataStorage> persistentStateManagerFactory, int viewDistance, boolean dsync) {
super(session.getDimensionPath(world.dimension()).resolve("region"), dataFixer, dsync);
- this.visibleChunkMap = this.updatingChunkMap.clone();
- this.pendingUnloads = new Long2ObjectLinkedOpenHashMap();
- this.entitiesInLevel = new LongOpenHashSet();
- this.toDrop = new LongOpenHashSet();
+ // Paper - rewrite chunk system
this.tickingGenerated = new AtomicInteger();
this.playerMap = new PlayerMap();
this.entityMap = new Int2ObjectOpenHashMap();
@@ -254,19 +231,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
this.mainThreadExecutor = mainThreadExecutor;
- ProcessorMailbox<Runnable> threadedmailbox = ProcessorMailbox.create(executor, "worldgen");
+ // Paper - rewrite chunk system
Objects.requireNonNull(mainThreadExecutor);
- ProcessorHandle<Runnable> mailbox = ProcessorHandle.of("main", mainThreadExecutor::tell);
+ // Paper - rewrite chunk system
this.progressListener = worldGenerationProgressListener;
this.chunkStatusListener = chunkStatusChangeListener;
- ProcessorMailbox<Runnable> threadedmailbox1 = ProcessorMailbox.create(executor, "light");
+ // Paper - rewrite chunk system
- this.queueSorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(threadedmailbox, mailbox, threadedmailbox1), executor, Integer.MAX_VALUE);
- this.worldgenMailbox = this.queueSorter.getProcessor(threadedmailbox, false);
- this.mainThreadMailbox = this.queueSorter.getProcessor(mailbox, false);
- this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), threadedmailbox1, this.queueSorter.getProcessor(threadedmailbox1, false));
+ // Paper - rewrite chunk system
+ this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), null, null); // Paper - rewrite chunk system
this.distanceManager = new ChunkMap.ChunkDistanceManager(executor, mainThreadExecutor);
this.overworldDataStorage = persistentStateManagerFactory;
this.poiManager = new PoiManager(path.resolve("poi"), dataFixer, dsync, world.registryAccess(), world);
@@ -327,20 +302,22 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@Nullable
public ChunkHolder getUpdatingChunkIfPresent(long pos) {
- return (ChunkHolder) this.updatingChunkMap.get(pos);
+ // Paper start - rewrite chunk system
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder holder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(pos);
+ return holder == null ? null : holder.vanillaChunkHolder;
+ // Paper end - rewrite chunk system
}
@Nullable
public ChunkHolder getVisibleChunkIfPresent(long pos) {
- return (ChunkHolder) this.visibleChunkMap.get(pos);
+ // Paper start - rewrite chunk system
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder holder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(pos);
+ return holder == null ? null : holder.vanillaChunkHolder;
+ // Paper end - rewrite chunk system
}
protected IntSupplier getChunkQueueLevel(long pos) {
- return () -> {
- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos);
-
- return playerchunk == null ? ChunkTaskPriorityQueue.PRIORITY_LEVEL_COUNT - 1 : Math.min(playerchunk.getQueueLevel(), ChunkTaskPriorityQueue.PRIORITY_LEVEL_COUNT - 1);
- };
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public String getChunkDebugData(ChunkPos chunkPos) {
@@ -377,75 +354,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
// Paper end
private CompletableFuture<Either<List<ChunkAccess>, ChunkHolder.ChunkLoadingFailure>> getChunkRangeFuture(ChunkPos centerChunk, int margin, IntFunction<ChunkStatus> distanceToStatus) {
- List<CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>>> list = new ArrayList();
- List<ChunkHolder> list1 = new ArrayList();
- int j = centerChunk.x;
- int k = centerChunk.z;
-
- for (int l = -margin; l <= margin; ++l) {
- for (int i1 = -margin; i1 <= margin; ++i1) {
- int j1 = Math.max(Math.abs(i1), Math.abs(l));
- final ChunkPos chunkcoordintpair1 = new ChunkPos(j + i1, k + l);
- long k1 = chunkcoordintpair1.toLong();
- ChunkHolder playerchunk = this.getUpdatingChunkIfPresent(k1);
-
- if (playerchunk == null) {
- return CompletableFuture.completedFuture(Either.right(new ChunkHolder.ChunkLoadingFailure() {
- public String toString() {
- return "Unloaded " + chunkcoordintpair1;
- }
- }));
- }
-
- ChunkStatus chunkstatus = (ChunkStatus) distanceToStatus.apply(j1);
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = playerchunk.getOrScheduleFuture(chunkstatus, this);
-
- list1.add(playerchunk);
- list.add(completablefuture);
- }
- }
-
- CompletableFuture<List<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>>> completablefuture1 = Util.sequence(list);
- CompletableFuture<Either<List<ChunkAccess>, ChunkHolder.ChunkLoadingFailure>> completablefuture2 = completablefuture1.thenApply((list2) -> {
- List<ChunkAccess> list3 = Lists.newArrayList();
- // CraftBukkit start - decompile error
- int cnt = 0;
-
- for (Iterator iterator = list2.iterator(); iterator.hasNext(); ++cnt) {
- final int l1 = cnt;
- // CraftBukkit end
- final Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = (Either) iterator.next();
-
- if (either == null) {
- throw this.debugFuturesAndCreateReportedException(new IllegalStateException("At least one of the chunk futures were null"), "n/a");
- }
-
- Optional<ChunkAccess> optional = either.left();
-
- if (!optional.isPresent()) {
- return Either.right(new ChunkHolder.ChunkLoadingFailure() {
- public String toString() {
- ChunkPos chunkcoordintpair2 = new ChunkPos(j + l1 % (margin * 2 + 1), k + l1 / (margin * 2 + 1));
-
- return "Unloaded " + chunkcoordintpair2 + " " + either.right().get();
- }
- });
- }
-
- list3.add((ChunkAccess) optional.get());
- }
-
- return Either.left(list3);
- });
- Iterator iterator = list1.iterator();
-
- while (iterator.hasNext()) {
- ChunkHolder playerchunk1 = (ChunkHolder) iterator.next();
-
- playerchunk1.addSaveDependency("getChunkRangeFuture " + centerChunk + " " + margin, completablefuture2);
- }
-
- return completablefuture2;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public ReportedException debugFuturesAndCreateReportedException(IllegalStateException exception, String details) {
@@ -475,261 +384,72 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
public CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> prepareEntityTickingChunk(ChunkPos pos) {
- return this.getChunkRangeFuture(pos, 2, (i) -> {
- return ChunkStatus.FULL;
- }).thenApplyAsync((either) -> {
- return either.mapLeft((list) -> {
- return (LevelChunk) list.get(list.size() / 2);
- });
- }, this.mainThreadExecutor);
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
@Nullable
ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k) {
- if (k > ChunkMap.MAX_CHUNK_DISTANCE && level > ChunkMap.MAX_CHUNK_DISTANCE) {
- return holder;
- } else {
- if (holder != null) {
- holder.setTicketLevel(level);
- }
-
- if (holder != null) {
- if (level > ChunkMap.MAX_CHUNK_DISTANCE) {
- this.toDrop.add(pos);
- } else {
- this.toDrop.remove(pos);
- }
- }
-
- if (level <= ChunkMap.MAX_CHUNK_DISTANCE && holder == null) {
- holder = (ChunkHolder) this.pendingUnloads.remove(pos);
- if (holder != null) {
- holder.setTicketLevel(level);
- } else {
- holder = new ChunkHolder(new ChunkPos(pos), level, this.level, this.lightEngine, this.queueSorter, this);
- // Paper start
- net.minecraft.server.ChunkSystem.onChunkHolderCreate(this.level, holder);
- // Paper end
- }
-
- // Paper start
- holder.onChunkAdd();
- // Paper end
- this.updatingChunkMap.put(pos, holder);
- this.modified = true;
- }
-
- return holder;
- }
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
@Override
public void close() throws IOException {
- try {
- this.queueSorter.close();
- this.poiManager.close();
- } finally {
- super.close();
- }
+ throw new UnsupportedOperationException("Use ServerChunkCache#close"); // Paper - rewrite chunk system
+ }
+ // Paper start - rewrite chunk system
+ protected void saveIncrementally() {
+ this.level.chunkTaskScheduler.chunkHolderManager.autoSave(); // Paper - rewrite chunk system
}
+ // Paper end - - rewrite chunk system
protected void saveAllChunks(boolean flush) {
- if (flush) {
- List<ChunkHolder> list = (List) net.minecraft.server.ChunkSystem.getVisibleChunkHolders(this.level).stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).collect(Collectors.toList()); // Paper
- MutableBoolean mutableboolean = new MutableBoolean();
-
- do {
- mutableboolean.setFalse();
- list.stream().map((playerchunk) -> {
- CompletableFuture completablefuture;
-
- do {
- completablefuture = playerchunk.getChunkToSave();
- BlockableEventLoop iasynctaskhandler = this.mainThreadExecutor;
-
- Objects.requireNonNull(completablefuture);
- iasynctaskhandler.managedBlock(completablefuture::isDone);
- } while (completablefuture != playerchunk.getChunkToSave());
-
- return (ChunkAccess) completablefuture.join();
- }).filter((ichunkaccess) -> {
- return ichunkaccess instanceof ImposterProtoChunk || ichunkaccess instanceof LevelChunk;
- }).filter(this::save).forEach((ichunkaccess) -> {
- mutableboolean.setTrue();
- });
- } while (mutableboolean.isTrue());
-
- this.processUnloads(() -> {
- return true;
- });
- this.flushWorker();
- } else {
- net.minecraft.server.ChunkSystem.getVisibleChunkHolders(this.level).forEach(this::saveChunkIfNeeded);
- }
-
+ this.level.chunkTaskScheduler.chunkHolderManager.saveAllChunks(flush, false, false); // Paper - rewrite chunk system
}
protected void tick(BooleanSupplier shouldKeepTicking) {
ProfilerFiller gameprofilerfiller = this.level.getProfiler();
+ try (Timing ignored = this.level.timings.poiUnload.startTiming()) { // Paper
gameprofilerfiller.push("poi");
this.poiManager.tick(shouldKeepTicking);
+ } // Paper
gameprofilerfiller.popPush("chunk_unload");
if (!this.level.noSave()) {
+ try (Timing ignored = this.level.timings.chunkUnload.startTiming()) { // Paper
this.processUnloads(shouldKeepTicking);
+ } // Paper
}
gameprofilerfiller.pop();
}
public boolean hasWork() {
- return this.lightEngine.hasLightWork() || !this.pendingUnloads.isEmpty() || net.minecraft.server.ChunkSystem.hasAnyChunkHolders(this.level) || this.poiManager.hasWork() || !this.toDrop.isEmpty() || !this.unloadQueue.isEmpty() || this.queueSorter.hasWork() || this.distanceManager.hasTickets(); // Paper
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
private void processUnloads(BooleanSupplier shouldKeepTicking) {
- LongIterator longiterator = this.toDrop.iterator();
-
- for (int i = 0; longiterator.hasNext() && (shouldKeepTicking.getAsBoolean() || i < 200 || this.toDrop.size() > 2000); longiterator.remove()) {
- long j = longiterator.nextLong();
- ChunkHolder playerchunk = (ChunkHolder) this.updatingChunkMap.remove(j);
-
- if (playerchunk != null) {
- playerchunk.onChunkRemove(); // Paper
- this.pendingUnloads.put(j, playerchunk);
- this.modified = true;
- ++i;
- this.scheduleUnload(j, playerchunk);
- }
- }
-
- int k = Math.max(0, this.unloadQueue.size() - 2000);
-
- Runnable runnable;
-
- while ((shouldKeepTicking.getAsBoolean() || k > 0) && (runnable = (Runnable) this.unloadQueue.poll()) != null) {
- --k;
- runnable.run();
- }
-
- int l = 0;
- Iterator objectiterator = net.minecraft.server.ChunkSystem.getVisibleChunkHolders(this.level).iterator(); // Paper
-
- while (l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) {
- if (this.saveChunkIfNeeded((ChunkHolder) objectiterator.next())) {
- ++l;
- }
- }
+ this.level.chunkTaskScheduler.chunkHolderManager.processUnloads(); // Paper - rewrite chunk system
}
private void scheduleUnload(long pos, ChunkHolder holder) {
- CompletableFuture<ChunkAccess> completablefuture = holder.getChunkToSave();
- Consumer<ChunkAccess> consumer = (ichunkaccess) -> { // CraftBukkit - decompile error
- CompletableFuture<ChunkAccess> completablefuture1 = holder.getChunkToSave();
-
- if (completablefuture1 != completablefuture) {
- this.scheduleUnload(pos, holder);
- } else {
- // Paper start
- boolean removed;
- if ((removed = this.pendingUnloads.remove(pos, holder)) && ichunkaccess != null) {
- net.minecraft.server.ChunkSystem.onChunkHolderDelete(this.level, holder);
- // Paper end
- if (ichunkaccess instanceof LevelChunk) {
- ((LevelChunk) ichunkaccess).setLoaded(false);
- }
-
- this.save(ichunkaccess);
- if (this.entitiesInLevel.remove(pos) && ichunkaccess instanceof LevelChunk) {
- LevelChunk chunk = (LevelChunk) ichunkaccess;
-
- this.level.unload(chunk);
- }
-
- this.lightEngine.updateChunkStatus(ichunkaccess.getPos());
- this.lightEngine.tryScheduleUpdate();
- this.progressListener.onStatusChange(ichunkaccess.getPos(), (ChunkStatus) null);
- this.chunkSaveCooldowns.remove(ichunkaccess.getPos().toLong());
- } else if (removed) { // Paper start
- net.minecraft.server.ChunkSystem.onChunkHolderDelete(this.level, holder);
- } // Paper end
-
- }
- };
- Queue queue = this.unloadQueue;
-
- Objects.requireNonNull(this.unloadQueue);
- completablefuture.thenAcceptAsync(consumer, queue::add).whenComplete((ovoid, throwable) -> {
- if (throwable != null) {
- ChunkMap.LOGGER.error("Failed to save chunk {}", holder.getPos(), throwable);
- }
-
- });
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
protected boolean promoteChunkMap() {
- if (!this.modified) {
- return false;
- } else {
- this.visibleChunkMap = this.updatingChunkMap.clone();
- this.modified = false;
- return true;
- }
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> schedule(ChunkHolder holder, ChunkStatus requiredStatus) {
- ChunkPos chunkcoordintpair = holder.getPos();
-
- if (requiredStatus == ChunkStatus.EMPTY) {
- return this.scheduleChunkLoad(chunkcoordintpair);
- } else {
- if (requiredStatus == ChunkStatus.LIGHT) {
- this.distanceManager.addTicket(TicketType.LIGHT, chunkcoordintpair, 33 + ChunkStatus.getDistance(ChunkStatus.LIGHT), chunkcoordintpair);
- }
-
- Optional<ChunkAccess> optional = ((Either) holder.getOrScheduleFuture(requiredStatus.getParent(), this).getNow(ChunkHolder.UNLOADED_CHUNK)).left();
-
- if (optional.isPresent() && ((ChunkAccess) optional.get()).getStatus().isOrAfter(requiredStatus)) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = requiredStatus.load(this.level, this.structureTemplateManager, this.lightEngine, (ichunkaccess) -> {
- return this.protoChunkToFullChunk(holder);
- }, (ChunkAccess) optional.get());
-
- this.progressListener.onStatusChange(chunkcoordintpair, requiredStatus);
- return completablefuture;
- } else {
- return this.scheduleChunkGeneration(holder, requiredStatus);
- }
- }
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
private CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> scheduleChunkLoad(ChunkPos pos) {
- return this.readChunk(pos).thenApply((optional) -> {
- return optional.filter((nbttagcompound) -> {
- boolean flag = ChunkMap.isChunkDataValid(nbttagcompound);
-
- if (!flag) {
- ChunkMap.LOGGER.error("Chunk file at {} is missing level data, skipping", pos);
- }
-
- return flag;
- });
- }).thenApplyAsync((optional) -> {
- this.level.getProfiler().incrementCounter("chunkLoad");
- if (optional.isPresent()) {
- ProtoChunk protochunk = ChunkSerializer.read(this.level, this.poiManager, pos, (CompoundTag) optional.get());
-
- this.markPosition(pos, protochunk.getStatus().getChunkType());
- return Either.<ChunkAccess, ChunkHolder.ChunkLoadingFailure>left(protochunk); // CraftBukkit - decompile error
- } else {
- return Either.<ChunkAccess, ChunkHolder.ChunkLoadingFailure>left(this.createEmptyChunk(pos)); // CraftBukkit - decompile error
- }
- }, this.mainThreadExecutor).exceptionallyAsync((throwable) -> {
- return this.handleChunkLoadFailure(throwable, pos);
- }, this.mainThreadExecutor);
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
- private static boolean isChunkDataValid(CompoundTag nbt) {
+ public static boolean isChunkDataValid(CompoundTag nbt) { // Paper - async chunk loading
return nbt.contains("Status", 8);
}
@@ -765,45 +485,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
private CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> scheduleChunkGeneration(ChunkHolder holder, ChunkStatus requiredStatus) {
- ChunkPos chunkcoordintpair = holder.getPos();
- CompletableFuture<Either<List<ChunkAccess>, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getChunkRangeFuture(chunkcoordintpair, requiredStatus.getRange(), (i) -> {
- return this.getDependencyStatus(requiredStatus, i);
- });
-
- this.level.getProfiler().incrementCounter(() -> {
- return "chunkGenerate " + requiredStatus.getName();
- });
- Executor executor = (runnable) -> {
- this.worldgenMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable));
- };
-
- return completablefuture.thenComposeAsync((either) -> {
- return (CompletionStage) either.map((list) -> {
- try {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture1 = requiredStatus.generate(executor, this.level, this.generator, this.structureTemplateManager, this.lightEngine, (ichunkaccess) -> {
- return this.protoChunkToFullChunk(holder);
- }, list, false);
-
- this.progressListener.onStatusChange(chunkcoordintpair, requiredStatus);
- return completablefuture1;
- } catch (Exception exception) {
- exception.getStackTrace();
- CrashReport crashreport = CrashReport.forThrowable(exception, "Exception generating new chunk");
- CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Chunk to be generated");
-
- crashreportsystemdetails.setDetail("Location", (Object) String.format(Locale.ROOT, "%d,%d", chunkcoordintpair.x, chunkcoordintpair.z));
- crashreportsystemdetails.setDetail("Position hash", (Object) ChunkPos.asLong(chunkcoordintpair.x, chunkcoordintpair.z));
- crashreportsystemdetails.setDetail("Generator", (Object) this.generator);
- this.mainThreadExecutor.execute(() -> {
- throw new ReportedException(crashreport);
- });
- throw new ReportedException(crashreport);
- }
- }, (playerchunk_failure) -> {
- this.releaseLightTicket(chunkcoordintpair);
- return CompletableFuture.completedFuture(Either.right(playerchunk_failure));
- });
- }, executor);
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
protected void releaseLightTicket(ChunkPos pos) {
@@ -814,7 +496,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}));
}
- private ChunkStatus getDependencyStatus(ChunkStatus centerChunkTargetStatus, int distance) {
+ public static ChunkStatus getDependencyStatus(ChunkStatus centerChunkTargetStatus, int distance) { // Paper -> public, static
ChunkStatus chunkstatus1;
if (distance == 0) {
@@ -826,7 +508,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
return chunkstatus1;
}
- private static void postLoadProtoChunk(ServerLevel world, List<CompoundTag> nbt) {
+ public static void postLoadProtoChunk(ServerLevel world, List<CompoundTag> nbt) { // Paper - public
if (!nbt.isEmpty()) {
// CraftBukkit start - these are spawned serialized (DefinedStructure) and we don't call an add event below at the moment due to ordering complexities
world.addWorldGenChunkEntities(EntityType.loadEntitiesRecursive(nbt, world).filter((entity) -> {
@@ -848,91 +530,15 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
private CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> protoChunkToFullChunk(ChunkHolder chunkHolder) {
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = chunkHolder.getFutureIfPresentUnchecked(ChunkStatus.FULL.getParent());
-
- return completablefuture.thenApplyAsync((either) -> {
- ChunkStatus chunkstatus = ChunkHolder.getStatus(chunkHolder.getTicketLevel());
-
- return !chunkstatus.isOrAfter(ChunkStatus.FULL) ? ChunkHolder.UNLOADED_CHUNK : either.mapLeft((ichunkaccess) -> {
- try (Timing ignored = level.timings.chunkPostLoad.startTimingIfSync()) { // Paper
- ChunkPos chunkcoordintpair = chunkHolder.getPos();
- ProtoChunk protochunk = (ProtoChunk) ichunkaccess;
- LevelChunk chunk;
-
- if (protochunk instanceof ImposterProtoChunk) {
- chunk = ((ImposterProtoChunk) protochunk).getWrapped();
- } else {
- chunk = new LevelChunk(this.level, protochunk, (chunk1) -> {
- ChunkMap.postLoadProtoChunk(this.level, protochunk.getEntities());
- });
- chunkHolder.replaceProtoChunk(new ImposterProtoChunk(chunk, false));
- }
-
- chunk.setFullStatus(() -> {
- return ChunkHolder.getFullChunkStatus(chunkHolder.getTicketLevel());
- });
- chunk.runPostLoad();
- if (this.entitiesInLevel.add(chunkcoordintpair.toLong())) {
- chunk.setLoaded(true);
- chunk.registerAllBlockEntitiesAfterLevelLoad();
- chunk.registerTickContainerInLevel(this.level);
- }
-
- return chunk;
- } // Paper
- });
- }, (runnable) -> {
- ProcessorHandle mailbox = this.mainThreadMailbox;
- long i = chunkHolder.getPos().toLong();
-
- Objects.requireNonNull(chunkHolder);
- mailbox.tell(ChunkTaskPriorityQueueSorter.message(runnable, i, chunkHolder::getTicketLevel));
- });
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> prepareTickingChunk(ChunkHolder holder) {
- ChunkPos chunkcoordintpair = holder.getPos();
- CompletableFuture<Either<List<ChunkAccess>, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getChunkRangeFuture(chunkcoordintpair, 1, (i) -> {
- return ChunkStatus.FULL;
- });
- CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> completablefuture1 = completablefuture.thenApplyAsync((either) -> {
- return either.mapLeft((list) -> {
- return (LevelChunk) list.get(list.size() / 2);
- });
- }, (runnable) -> {
- this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable));
- }).thenApplyAsync((either) -> {
- return either.ifLeft((chunk) -> {
- chunk.postProcessGeneration();
- this.level.startTickingChunk(chunk);
- });
- }, this.mainThreadExecutor);
-
- completablefuture1.thenAcceptAsync((either) -> {
- either.ifLeft((chunk) -> {
- this.tickingGenerated.getAndIncrement();
- MutableObject<ClientboundLevelChunkWithLightPacket> mutableobject = new MutableObject();
-
- this.getPlayers(chunkcoordintpair, false).forEach((entityplayer) -> {
- this.playerLoadedChunk(entityplayer, mutableobject, chunk);
- });
- });
- }, (runnable) -> {
- this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable));
- });
- return completablefuture1;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> prepareAccessibleChunk(ChunkHolder holder) {
- return this.getChunkRangeFuture(holder.getPos(), 1, ChunkStatus::getStatusAroundFullChunk).thenApplyAsync((either) -> {
- return either.mapLeft((list) -> {
- LevelChunk chunk = (LevelChunk) list.get(list.size() / 2);
-
- return chunk;
- });
- }, (runnable) -> {
- this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable));
- });
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public int getTickingGenerated() {
@@ -940,94 +546,22 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
private boolean saveChunkIfNeeded(ChunkHolder chunkHolder) {
- if (!chunkHolder.wasAccessibleSinceLastSave()) {
- return false;
- } else {
- ChunkAccess ichunkaccess = (ChunkAccess) chunkHolder.getChunkToSave().getNow(null); // CraftBukkit - decompile error
-
- if (!(ichunkaccess instanceof ImposterProtoChunk) && !(ichunkaccess instanceof LevelChunk)) {
- return false;
- } else {
- long i = ichunkaccess.getPos().toLong();
- long j = this.chunkSaveCooldowns.getOrDefault(i, -1L);
- long k = System.currentTimeMillis();
-
- if (k < j) {
- return false;
- } else {
- boolean flag = this.save(ichunkaccess);
-
- chunkHolder.refreshAccessibility();
- if (flag) {
- this.chunkSaveCooldowns.put(i, k + 10000L);
- }
-
- return flag;
- }
- }
- }
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public boolean save(ChunkAccess chunk) {
- this.poiManager.flush(chunk.getPos());
- if (!chunk.isUnsaved()) {
- return false;
- } else {
- chunk.setUnsaved(false);
- ChunkPos chunkcoordintpair = chunk.getPos();
-
- try {
- ChunkStatus chunkstatus = chunk.getStatus();
-
- if (chunkstatus.getChunkType() != ChunkStatus.ChunkType.LEVELCHUNK) {
- if (this.isExistingChunkFull(chunkcoordintpair)) {
- return false;
- }
-
- if (chunkstatus == ChunkStatus.EMPTY && chunk.getAllStarts().values().stream().noneMatch(StructureStart::isValid)) {
- return false;
- }
- }
-
- this.level.getProfiler().incrementCounter("chunkSave");
- CompoundTag nbttagcompound = ChunkSerializer.write(this.level, chunk);
-
- this.write(chunkcoordintpair, nbttagcompound);
- this.markPosition(chunkcoordintpair, chunkstatus.getChunkType());
- return true;
- } catch (Exception exception) {
- ChunkMap.LOGGER.error("Failed to save chunk {},{}", new Object[]{chunkcoordintpair.x, chunkcoordintpair.z, exception});
- return false;
- }
- }
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
private boolean isExistingChunkFull(ChunkPos pos) {
- byte b0 = this.chunkTypeCache.get(pos.toLong());
-
- if (b0 != 0) {
- return b0 == 1;
- } else {
- CompoundTag nbttagcompound;
-
- try {
- nbttagcompound = (CompoundTag) ((Optional) this.readChunk(pos).join()).orElse((Object) null);
- if (nbttagcompound == null) {
- this.markPositionReplaceable(pos);
- return false;
- }
- } catch (Exception exception) {
- ChunkMap.LOGGER.error("Failed to read chunk {}", pos, exception);
- this.markPositionReplaceable(pos);
- return false;
- }
-
- ChunkStatus.ChunkType chunkstatus_type = ChunkSerializer.getChunkTypeFromTag(nbttagcompound);
-
- return this.markPosition(pos, chunkstatus_type) == 1;
- }
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
+ // Paper start - replace player loader system
+ public void setTickViewDistance(int distance) {
+ this.playerChunkManager.setTickDistance(distance);
+ }
+ // Paper end - replace player loader system
public void setViewDistance(int watchDistance) {
int j = Mth.clamp(watchDistance + 1, (int) 3, (int) 33);
@@ -1035,33 +569,18 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
int k = this.viewDistance;
this.viewDistance = j;
- this.distanceManager.updatePlayerTickets(this.viewDistance + 1);
- Iterator objectiterator = net.minecraft.server.ChunkSystem.getUpdatingChunkHolders(this.level).iterator(); // Paper
-
- while (objectiterator.hasNext()) {
- ChunkHolder playerchunk = (ChunkHolder) objectiterator.next();
- ChunkPos chunkcoordintpair = playerchunk.getPos();
- MutableObject<ClientboundLevelChunkWithLightPacket> mutableobject = new MutableObject();
-
- this.getPlayers(chunkcoordintpair, false).forEach((entityplayer) -> {
- SectionPos sectionposition = entityplayer.getLastSectionPos();
- boolean flag = ChunkMap.isChunkInRange(chunkcoordintpair.x, chunkcoordintpair.z, sectionposition.x(), sectionposition.z(), k);
- boolean flag1 = ChunkMap.isChunkInRange(chunkcoordintpair.x, chunkcoordintpair.z, sectionposition.x(), sectionposition.z(), this.viewDistance);
-
- this.updateChunkTracking(entityplayer, chunkcoordintpair, mutableobject, flag, flag1);
- });
- }
+ this.playerChunkManager.setLoadDistance(this.viewDistance); // Paper - replace player loader system
}
}
- protected void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<ClientboundLevelChunkWithLightPacket> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) {
+ public void updateChunkTracking(ServerPlayer player, ChunkPos pos, MutableObject<ClientboundLevelChunkWithLightPacket> packet, boolean oldWithinViewDistance, boolean newWithinViewDistance) { // Paper - public
if (player.level == this.level) {
if (newWithinViewDistance && !oldWithinViewDistance) {
ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos.toLong());
if (playerchunk != null) {
- LevelChunk chunk = playerchunk.getTickingChunk();
+ LevelChunk chunk = playerchunk.getSendingChunk(); // Paper - replace chunk loader system
if (chunk != null) {
this.playerLoadedChunk(player, packet, chunk);
@@ -1091,30 +610,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
void dumpChunks(Writer writer) throws IOException {
- CsvOutput csvwriter = CsvOutput.builder().addColumn("x").addColumn("z").addColumn("level").addColumn("in_memory").addColumn("status").addColumn("full_status").addColumn("accessible_ready").addColumn("ticking_ready").addColumn("entity_ticking_ready").addColumn("ticket").addColumn("spawning").addColumn("block_entity_count").addColumn("ticking_ticket").addColumn("ticking_level").addColumn("block_ticks").addColumn("fluid_ticks").build(writer);
- TickingTracker tickingtracker = this.distanceManager.tickingTracker();
- Iterator<ChunkHolder> objectbidirectionaliterator = net.minecraft.server.ChunkSystem.getVisibleChunkHolders(this.level).iterator(); // Paper
-
- while (objectbidirectionaliterator.hasNext()) {
- ChunkHolder playerchunk = objectbidirectionaliterator.next(); // Paper
- long i = playerchunk.pos.toLong(); // Paper
- ChunkPos chunkcoordintpair = new ChunkPos(i);
- // Paper
- Optional<ChunkAccess> optional = Optional.ofNullable(playerchunk.getLastAvailable());
- Optional<LevelChunk> optional1 = optional.flatMap((ichunkaccess) -> {
- return ichunkaccess instanceof LevelChunk ? Optional.of((LevelChunk) ichunkaccess) : Optional.empty();
- });
-
- // CraftBukkit - decompile error
- csvwriter.writeRow(chunkcoordintpair.x, chunkcoordintpair.z, playerchunk.getTicketLevel(), optional.isPresent(), optional.map(ChunkAccess::getStatus).orElse(null), optional1.map(LevelChunk::getFullStatus).orElse(null), ChunkMap.printFuture(playerchunk.getFullChunkFuture()), ChunkMap.printFuture(playerchunk.getTickingChunkFuture()), ChunkMap.printFuture(playerchunk.getEntityTickingChunkFuture()), this.distanceManager.getTicketDebugString(i), this.anyPlayerCloseEnoughForSpawning(chunkcoordintpair), optional1.map((chunk) -> {
- return chunk.getBlockEntities().size();
- }).orElse(0), tickingtracker.getTicketDebugString(i), tickingtracker.getLevel(i), optional1.map((chunk) -> {
- return chunk.getBlockTicks().count();
- }).orElse(0), optional1.map((chunk) -> {
- return chunk.getFluidTicks().count();
- }).orElse(0));
- }
-
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
private static String printFuture(CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> future) {
@@ -1133,6 +629,35 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
}
+ // Paper start - Asynchronous chunk io
+ @Nullable
+ @Override
+ public CompoundTag readSync(ChunkPos chunkcoordintpair) throws IOException {
+ // Paper start - rewrite chunk system
+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) {
+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData(
+ this.level, chunkcoordintpair.x, chunkcoordintpair.z, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA,
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread()
+ );
+ }
+ // Paper end - rewrite chunk system
+ return super.readSync(chunkcoordintpair);
+ }
+
+ @Override
+ public void write(ChunkPos chunkcoordintpair, CompoundTag nbttagcompound) throws IOException {
+ // Paper start - rewrite chunk system
+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) {
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave(
+ this.level, chunkcoordintpair.x, chunkcoordintpair.z, nbttagcompound,
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA);
+ return;
+ }
+ // Paper end - rewrite chunk system
+ super.write(chunkcoordintpair, nbttagcompound);
+ }
+ // Paper end
+
private CompletableFuture<Optional<CompoundTag>> readChunk(ChunkPos chunkPos) {
return this.read(chunkPos).thenApplyAsync((optional) -> {
return optional.map((nbttagcompound) -> this.upgradeChunkTag(nbttagcompound, chunkPos)); // CraftBukkit
@@ -1236,15 +761,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
this.removePlayerFromDistanceMaps(player); // Paper - distance maps
}
- for (int k = i - this.viewDistance - 1; k <= i + this.viewDistance + 1; ++k) {
- for (int l = j - this.viewDistance - 1; l <= j + this.viewDistance + 1; ++l) {
- if (ChunkMap.isChunkInRange(k, l, i, j, this.viewDistance)) {
- ChunkPos chunkcoordintpair = new ChunkPos(k, l);
-
- this.updateChunkTracking(player, chunkcoordintpair, new MutableObject(), !added, added);
- }
- }
- }
+ // Paper - handled by player chunk loader
}
@@ -1252,7 +769,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
SectionPos sectionposition = SectionPos.of((EntityAccess) player);
player.setLastSectionPos(sectionposition);
- player.connection.send(new ClientboundSetChunkCacheCenterPacket(sectionposition.x(), sectionposition.z()));
+ //player.connection.send(new ClientboundSetChunkCacheCenterPacket(sectionposition.x(), sectionposition.z())); // Paper - handled by player chunk loader
return sectionposition;
}
@@ -1307,65 +824,38 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
int k1;
int l1;
- if (Math.abs(i1 - i) <= this.viewDistance * 2 && Math.abs(j1 - j) <= this.viewDistance * 2) {
- k1 = Math.min(i, i1) - this.viewDistance - 1;
- l1 = Math.min(j, j1) - this.viewDistance - 1;
- int i2 = Math.max(i, i1) + this.viewDistance + 1;
- int j2 = Math.max(j, j1) + this.viewDistance + 1;
-
- for (int k2 = k1; k2 <= i2; ++k2) {
- for (int l2 = l1; l2 <= j2; ++l2) {
- boolean flag3 = ChunkMap.isChunkInRange(k2, l2, i1, j1, this.viewDistance);
- boolean flag4 = ChunkMap.isChunkInRange(k2, l2, i, j, this.viewDistance);
-
- this.updateChunkTracking(player, new ChunkPos(k2, l2), new MutableObject(), flag3, flag4);
- }
- }
- } else {
- boolean flag5;
- boolean flag6;
-
- for (k1 = i1 - this.viewDistance - 1; k1 <= i1 + this.viewDistance + 1; ++k1) {
- for (l1 = j1 - this.viewDistance - 1; l1 <= j1 + this.viewDistance + 1; ++l1) {
- if (ChunkMap.isChunkInRange(k1, l1, i1, j1, this.viewDistance)) {
- flag5 = true;
- flag6 = false;
- this.updateChunkTracking(player, new ChunkPos(k1, l1), new MutableObject(), true, false);
- }
- }
- }
-
- for (k1 = i - this.viewDistance - 1; k1 <= i + this.viewDistance + 1; ++k1) {
- for (l1 = j - this.viewDistance - 1; l1 <= j + this.viewDistance + 1; ++l1) {
- if (ChunkMap.isChunkInRange(k1, l1, i, j, this.viewDistance)) {
- flag5 = false;
- flag6 = true;
- this.updateChunkTracking(player, new ChunkPos(k1, l1), new MutableObject(), false, true);
- }
- }
- }
- }
+ // Paper - replaced by PlayerChunkLoader
this.updateMaps(player); // Paper - distance maps
+ this.playerChunkManager.updatePlayer(player); // Paper - respond to movement immediately
}
@Override
public List<ServerPlayer> getPlayers(ChunkPos chunkPos, boolean onlyOnWatchDistanceEdge) {
- Set<ServerPlayer> set = this.playerMap.getPlayers(chunkPos.toLong());
- Builder<ServerPlayer> builder = ImmutableList.builder();
- Iterator iterator = set.iterator();
+ // Paper start - per player view distance
+ // there can be potential desync with player's last mapped section and the view distance map, so use the
+ // view distance map here.
+ com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> players = this.playerChunkManager.broadcastMap.getObjectsInRange(chunkPos);
+ if (players == null) {
+ return java.util.Collections.emptyList();
+ }
- while (iterator.hasNext()) {
- ServerPlayer entityplayer = (ServerPlayer) iterator.next();
- SectionPos sectionposition = entityplayer.getLastSectionPos();
+ List<ServerPlayer> ret = new java.util.ArrayList<>(players.size());
- if (onlyOnWatchDistanceEdge && ChunkMap.isChunkOnRangeBorder(chunkPos.x, chunkPos.z, sectionposition.x(), sectionposition.z(), this.viewDistance) || !onlyOnWatchDistanceEdge && ChunkMap.isChunkInRange(chunkPos.x, chunkPos.z, sectionposition.x(), sectionposition.z(), this.viewDistance)) {
- builder.add(entityplayer);
+ Object[] backingSet = players.getBackingSet();
+ for (int i = 0, len = backingSet.length; i < len; ++i) {
+ if (!(backingSet[i] instanceof ServerPlayer player)) {
+ continue;
+ }
+ if (!this.playerChunkManager.isChunkSent(player, chunkPos.x, chunkPos.z, onlyOnWatchDistanceEdge)) {
+ continue;
}
+ ret.add(player);
}
- return builder.build();
+ return ret;
+ // Paper end - per player view distance
}
public void addEntity(Entity entity) {
@@ -1560,7 +1050,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@Override
protected boolean isChunkToRemove(long pos) {
- return ChunkMap.this.toDrop.contains(pos);
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
@Nullable
@@ -1641,7 +1131,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
org.spigotmc.AsyncCatcher.catchOp("player tracker update"); // Spigot
if (player != this.entity) {
Vec3 vec3d = player.position().subtract(this.entity.position());
- double d0 = (double) Math.min(this.getEffectiveRange(), (ChunkMap.this.viewDistance - 1) * 16);
+ double d0 = (double) Math.min(this.getEffectiveRange(), io.papermc.paper.chunk.PlayerChunkLoader.getSendViewDistance(player) * 16); // Paper - per player view distance
double d1 = vec3d.x * vec3d.x + vec3d.z * vec3d.z;
double d2 = d0 * d0;
boolean flag = d1 <= d2 && this.entity.broadcastToPlayer(player);
diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java
index d38ad1b1eee92a6dbd2b79b4fcdb8959cdb4007d..ffa1e457decf8502c3283352bf5be94d419ff165 100644
--- a/src/main/java/net/minecraft/server/level/DistanceManager.java
+++ b/src/main/java/net/minecraft/server/level/DistanceManager.java
@@ -40,6 +40,12 @@ import org.slf4j.Logger;
public abstract class DistanceManager {
+ // Paper start - rewrite chunk system
+ public io.papermc.paper.chunk.system.scheduling.ChunkHolderManager getChunkHolderManager() {
+ return this.chunkMap.level.chunkTaskScheduler.chunkHolderManager;
+ }
+ // Paper end - rewrite chunk system
+
static final Logger LOGGER = LogUtils.getLogger();
private static final int ENTITY_TICKING_RANGE = 2;
static final int PLAYER_TICKET_LEVEL = 33 + ChunkStatus.getDistance(ChunkStatus.FULL) - 2;
@@ -47,61 +53,20 @@ public abstract class DistanceManager {
private static final int ENTITY_TICKING_LEVEL_THRESHOLD = 32;
private static final int BLOCK_TICKING_LEVEL_THRESHOLD = 33;
final Long2ObjectMap<ObjectSet<ServerPlayer>> playersPerChunk = new Long2ObjectOpenHashMap();
- public final Long2ObjectOpenHashMap<SortedArraySet<Ticket<?>>> tickets = new Long2ObjectOpenHashMap();
- private final DistanceManager.ChunkTicketTracker ticketTracker = new DistanceManager.ChunkTicketTracker();
+ // Paper - rewrite chunk system
private final DistanceManager.FixedPlayerDistanceChunkTracker naturalSpawnChunkCounter = new DistanceManager.FixedPlayerDistanceChunkTracker(8);
- private final TickingTracker tickingTicketsTracker = new TickingTracker();
- private final DistanceManager.PlayerTicketTracker playerTicketManager = new DistanceManager.PlayerTicketTracker(33);
- final Set<ChunkHolder> chunksToUpdateFutures = Sets.newHashSet();
- final ChunkTaskPriorityQueueSorter ticketThrottler;
- final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> ticketThrottlerInput;
- final ProcessorHandle<ChunkTaskPriorityQueueSorter.Release> ticketThrottlerReleaser;
- final LongSet ticketsToRelease = new LongOpenHashSet();
- final Executor mainThreadExecutor;
- private long ticketTickCounter;
- private int simulationDistance = 10;
+ //private final TickingTracker tickingTicketsTracker = new TickingTracker(); // Paper - no longer used
+ //private final DistanceManager.PlayerTicketTracker playerTicketManager = new DistanceManager.PlayerTicketTracker(33); // Paper - no longer used
+ // Paper - rewrite chunk system
private final ChunkMap chunkMap; // Paper
protected DistanceManager(Executor workerExecutor, Executor mainThreadExecutor, ChunkMap chunkMap) {
- Objects.requireNonNull(mainThreadExecutor);
- ProcessorHandle<Runnable> mailbox = ProcessorHandle.of("player ticket throttler", mainThreadExecutor::execute);
- ChunkTaskPriorityQueueSorter chunktaskqueuesorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(mailbox), workerExecutor, 4);
-
- this.ticketThrottler = chunktaskqueuesorter;
- this.ticketThrottlerInput = chunktaskqueuesorter.getProcessor(mailbox, true);
- this.ticketThrottlerReleaser = chunktaskqueuesorter.getReleaseProcessor(mailbox);
- this.mainThreadExecutor = mainThreadExecutor;
+ // Paper - rewrite chunk system
this.chunkMap = chunkMap; // Paper
}
protected void purgeStaleTickets() {
- ++this.ticketTickCounter;
- ObjectIterator objectiterator = this.tickets.long2ObjectEntrySet().fastIterator();
-
- while (objectiterator.hasNext()) {
- Entry<SortedArraySet<Ticket<?>>> entry = (Entry) objectiterator.next();
- Iterator<Ticket<?>> iterator = ((SortedArraySet) entry.getValue()).iterator();
- boolean flag = false;
-
- while (iterator.hasNext()) {
- Ticket<?> ticket = (Ticket) iterator.next();
-
- if (ticket.timedOut(this.ticketTickCounter)) {
- iterator.remove();
- flag = true;
- this.tickingTicketsTracker.removeTicket(entry.getLongKey(), ticket);
- }
- }
-
- if (flag) {
- this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt((SortedArraySet) entry.getValue()), false);
- }
-
- if (((SortedArraySet) entry.getValue()).isEmpty()) {
- objectiterator.remove();
- }
- }
-
+ this.getChunkHolderManager().tick(); // Paper - rewrite chunk system
}
private static int getTicketLevelAt(SortedArraySet<Ticket<?>> tickets) {
@@ -117,108 +82,25 @@ public abstract class DistanceManager {
protected abstract ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k);
public boolean runAllUpdates(ChunkMap chunkStorage) {
- this.naturalSpawnChunkCounter.runAllUpdates();
- this.tickingTicketsTracker.runAllUpdates();
- this.playerTicketManager.runAllUpdates();
- int i = Integer.MAX_VALUE - this.ticketTracker.runDistanceUpdates(Integer.MAX_VALUE);
- boolean flag = i != 0;
-
- if (flag) {
- ;
- }
-
- if (!this.chunksToUpdateFutures.isEmpty()) {
- // CraftBukkit start
- // Iterate pending chunk updates with protection against concurrent modification exceptions
- java.util.Iterator<ChunkHolder> iter = this.chunksToUpdateFutures.iterator();
- int expectedSize = this.chunksToUpdateFutures.size();
- do {
- ChunkHolder playerchunk = iter.next();
- iter.remove();
- expectedSize--;
-
- playerchunk.updateFutures(chunkStorage, this.mainThreadExecutor);
-
- // Reset iterator if set was modified using add()
- if (this.chunksToUpdateFutures.size() != expectedSize) {
- expectedSize = this.chunksToUpdateFutures.size();
- iter = this.chunksToUpdateFutures.iterator();
- }
- } while (iter.hasNext());
- // CraftBukkit end
-
- return true;
- } else {
- if (!this.ticketsToRelease.isEmpty()) {
- LongIterator longiterator = this.ticketsToRelease.iterator();
-
- while (longiterator.hasNext()) {
- long j = longiterator.nextLong();
-
- if (this.getTickets(j).stream().anyMatch((ticket) -> {
- return ticket.getType() == TicketType.PLAYER;
- })) {
- ChunkHolder playerchunk = chunkStorage.getUpdatingChunkIfPresent(j);
-
- if (playerchunk == null) {
- throw new IllegalStateException();
- }
-
- CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> completablefuture = playerchunk.getEntityTickingChunkFuture();
-
- completablefuture.thenAccept((either) -> {
- this.mainThreadExecutor.execute(() -> {
- this.ticketThrottlerReleaser.tell(ChunkTaskPriorityQueueSorter.release(() -> {
- }, j, false));
- });
- });
- }
- }
-
- this.ticketsToRelease.clear();
- }
-
- return flag;
- }
+ return this.getChunkHolderManager().processTicketUpdates(); // Paper - rewrite chunk system
}
boolean addTicket(long i, Ticket<?> ticket) { // CraftBukkit - void -> boolean
- SortedArraySet<Ticket<?>> arraysetsorted = this.getTickets(i);
- int j = DistanceManager.getTicketLevelAt(arraysetsorted);
- Ticket<?> ticket1 = (Ticket) arraysetsorted.addOrGet(ticket);
-
- ticket1.setCreatedTick(this.ticketTickCounter);
- if (ticket.getTicketLevel() < j) {
- this.ticketTracker.update(i, ticket.getTicketLevel(), true);
- }
-
- return ticket == ticket1; // CraftBukkit
+ org.spigotmc.AsyncCatcher.catchOp("ChunkMapDistance::addTicket"); // Paper
+ return this.getChunkHolderManager().addTicketAtLevel((TicketType)ticket.getType(), i, ticket.getTicketLevel(), ticket.key); // Paper - rewrite chunk system
}
boolean removeTicket(long i, Ticket<?> ticket) { // CraftBukkit - void -> boolean
- SortedArraySet<Ticket<?>> arraysetsorted = this.getTickets(i);
-
- boolean removed = false; // CraftBukkit
- if (arraysetsorted.remove(ticket)) {
- removed = true; // CraftBukkit
- }
-
- if (arraysetsorted.isEmpty()) {
- this.tickets.remove(i);
- }
-
- this.ticketTracker.update(i, DistanceManager.getTicketLevelAt(arraysetsorted), false);
- return removed; // CraftBukkit
+ org.spigotmc.AsyncCatcher.catchOp("ChunkMapDistance::removeTicket"); // Paper
+ return this.getChunkHolderManager().removeTicketAtLevel((TicketType)ticket.getType(), i, ticket.getTicketLevel(), ticket.key); // Paper - rewrite chunk system
}
public <T> void addTicket(TicketType<T> type, ChunkPos pos, int level, T argument) {
- this.addTicket(pos.toLong(), new Ticket<>(type, level, argument));
+ this.getChunkHolderManager().addTicketAtLevel(type, pos, level, argument); // Paper - rewrite chunk system
}
public <T> void removeTicket(TicketType<T> type, ChunkPos pos, int level, T argument) {
- Ticket<T> ticket = new Ticket<>(type, level, argument);
-
- this.removeTicket(pos.toLong(), ticket);
+ this.getChunkHolderManager().removeTicketAtLevel(type, pos, level, argument); // Paper - rewrite chunk system
}
public <T> void addRegionTicket(TicketType<T> type, ChunkPos pos, int radius, T argument) {
@@ -227,13 +109,7 @@ public abstract class DistanceManager {
}
public <T> boolean addRegionTicketAtDistance(TicketType<T> tickettype, ChunkPos chunkcoordintpair, int i, T t0) {
- // CraftBukkit end
- Ticket<T> ticket = new Ticket<>(tickettype, 33 - i, t0);
- long j = chunkcoordintpair.toLong();
-
- boolean added = this.addTicket(j, ticket); // CraftBukkit
- this.tickingTicketsTracker.addTicket(j, ticket);
- return added; // CraftBukkit
+ return this.getChunkHolderManager().addTicketAtLevel(tickettype, chunkcoordintpair, 33 - i, t0); // Paper - rewrite chunk system
}
public <T> void removeRegionTicket(TicketType<T> type, ChunkPos pos, int radius, T argument) {
@@ -242,31 +118,21 @@ public abstract class DistanceManager {
}
public <T> boolean removeRegionTicketAtDistance(TicketType<T> tickettype, ChunkPos chunkcoordintpair, int i, T t0) {
- // CraftBukkit end
- Ticket<T> ticket = new Ticket<>(tickettype, 33 - i, t0);
- long j = chunkcoordintpair.toLong();
-
- boolean removed = this.removeTicket(j, ticket); // CraftBukkit
- this.tickingTicketsTracker.removeTicket(j, ticket);
- return removed; // CraftBukkit
+ return this.getChunkHolderManager().removeTicketAtLevel(tickettype, chunkcoordintpair, 33 - i, t0); // Paper - rewrite chunk system
}
- private SortedArraySet<Ticket<?>> getTickets(long position) {
- return (SortedArraySet) this.tickets.computeIfAbsent(position, (j) -> {
- return SortedArraySet.create(4);
- });
- }
+ // Paper - rewrite chunk system
protected void updateChunkForced(ChunkPos pos, boolean forced) {
- Ticket<ChunkPos> ticket = new Ticket<>(TicketType.FORCED, 31, pos);
+ Ticket<ChunkPos> ticket = new Ticket<>(TicketType.FORCED, 31, pos, 0L); // Paper - rewrite chunk system
long i = pos.toLong();
if (forced) {
this.addTicket(i, ticket);
- this.tickingTicketsTracker.addTicket(i, ticket);
+ //this.tickingTicketsTracker.addTicket(i, ticket); // Paper - no longer used
} else {
this.removeTicket(i, ticket);
- this.tickingTicketsTracker.removeTicket(i, ticket);
+ //this.tickingTicketsTracker.removeTicket(i, ticket); // Paper - no longer used
}
}
@@ -275,12 +141,10 @@ public abstract class DistanceManager {
ChunkPos chunkcoordintpair = pos.chunk();
long i = chunkcoordintpair.toLong();
- ((ObjectSet) this.playersPerChunk.computeIfAbsent(i, (j) -> {
- return new ObjectOpenHashSet();
- })).add(player);
+ // Paper - no longer used
this.naturalSpawnChunkCounter.update(i, 0, true);
- this.playerTicketManager.update(i, 0, true);
- this.tickingTicketsTracker.addTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair);
+ //this.playerTicketManager.update(i, 0, true); // Paper - no longer used
+ //this.tickingTicketsTracker.addTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); // Paper - no longer used
}
public void removePlayer(SectionPos pos, ServerPlayer player) {
@@ -293,46 +157,44 @@ public abstract class DistanceManager {
if (objectset.isEmpty()) {
this.playersPerChunk.remove(i);
this.naturalSpawnChunkCounter.update(i, Integer.MAX_VALUE, false);
- this.playerTicketManager.update(i, Integer.MAX_VALUE, false);
- this.tickingTicketsTracker.removeTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair);
+ //this.playerTicketManager.update(i, Integer.MAX_VALUE, false); // Paper - no longer used
+ //this.tickingTicketsTracker.removeTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); // Paper - no longer used
}
}
- private int getPlayerTicketLevel() {
- return Math.max(0, 31 - this.simulationDistance);
- }
+ // Paper - rewrite chunk system
public boolean inEntityTickingRange(long chunkPos) {
- return this.tickingTicketsTracker.getLevel(chunkPos) < 32;
+ // Paper start - replace player chunk loader system
+ ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(chunkPos);
+ return holder != null && holder.isEntityTickingReady();
+ // Paper end - replace player chunk loader system
}
public boolean inBlockTickingRange(long chunkPos) {
- return this.tickingTicketsTracker.getLevel(chunkPos) < 33;
+ // Paper start - replace player chunk loader system
+ ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(chunkPos);
+ return holder != null && holder.isTickingReady();
+ // Paper end - replace player chunk loader system
}
protected String getTicketDebugString(long pos) {
- SortedArraySet<Ticket<?>> arraysetsorted = (SortedArraySet) this.tickets.get(pos);
-
- return arraysetsorted != null && !arraysetsorted.isEmpty() ? ((Ticket) arraysetsorted.first()).toString() : "no_ticket";
+ return this.getChunkHolderManager().getTicketDebugString(pos); // Paper - rewrite chunk system
}
protected void updatePlayerTickets(int viewDistance) {
- this.playerTicketManager.updateViewDistance(viewDistance);
+ this.chunkMap.playerChunkManager.setTargetNoTickViewDistance(viewDistance); // Paper - route to player chunk manager
}
// Paper start
public int getSimulationDistance() {
- return this.simulationDistance;
+ return this.chunkMap.playerChunkManager.getTargetTickViewDistance(); // Paper - route to player chunk manager
}
// Paper end
public void updateSimulationDistance(int simulationDistance) {
- if (simulationDistance != this.simulationDistance) {
- this.simulationDistance = simulationDistance;
- this.tickingTicketsTracker.replacePlayerTicketsLevel(this.getPlayerTicketLevel());
- }
-
+ this.chunkMap.playerChunkManager.setTargetTickViewDistance(simulationDistance); // Paper - route to player chunk manager
}
public int getNaturalSpawnChunkCount() {
@@ -346,103 +208,28 @@ public abstract class DistanceManager {
}
public String getDebugStatus() {
- return this.ticketThrottler.getDebugStatus();
+ return "No DistanceManager stats available"; // Paper - rewrite chunk system
}
- private void dumpTickets(String path) {
- try {
- FileOutputStream fileoutputstream = new FileOutputStream(new File(path));
-
- try {
- ObjectIterator objectiterator = this.tickets.long2ObjectEntrySet().iterator();
-
- while (objectiterator.hasNext()) {
- Entry<SortedArraySet<Ticket<?>>> entry = (Entry) objectiterator.next();
- ChunkPos chunkcoordintpair = new ChunkPos(entry.getLongKey());
- Iterator iterator = ((SortedArraySet) entry.getValue()).iterator();
-
- while (iterator.hasNext()) {
- Ticket<?> ticket = (Ticket) iterator.next();
-
- fileoutputstream.write((chunkcoordintpair.x + "\t" + chunkcoordintpair.z + "\t" + ticket.getType() + "\t" + ticket.getTicketLevel() + "\t\n").getBytes(StandardCharsets.UTF_8));
- }
- }
- } catch (Throwable throwable) {
- try {
- fileoutputstream.close();
- } catch (Throwable throwable1) {
- throwable.addSuppressed(throwable1);
- }
+ // Paper - rewrite chunk system
- throw throwable;
- }
-
- fileoutputstream.close();
- } catch (IOException ioexception) {
- DistanceManager.LOGGER.error("Failed to dump tickets to {}", path, ioexception);
- }
-
- }
-
- @VisibleForTesting
- TickingTracker tickingTracker() {
- return this.tickingTicketsTracker;
- }
+ // Paper - replace player chunk loader
public void removeTicketsOnClosing() {
- ImmutableSet<TicketType<?>> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT, TicketType.CHUNK_RELIGHT, ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET); // Paper - add additional tickets to preserve
- ObjectIterator objectiterator = this.tickets.long2ObjectEntrySet().fastIterator();
-
- while (objectiterator.hasNext()) {
- Entry<SortedArraySet<Ticket<?>>> entry = (Entry) objectiterator.next();
- Iterator<Ticket<?>> iterator = ((SortedArraySet) entry.getValue()).iterator();
- boolean flag = false;
-
- while (iterator.hasNext()) {
- Ticket<?> ticket = (Ticket) iterator.next();
-
- if (!immutableset.contains(ticket.getType())) {
- iterator.remove();
- flag = true;
- this.tickingTicketsTracker.removeTicket(entry.getLongKey(), ticket);
- }
- }
-
- if (flag) {
- this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt((SortedArraySet) entry.getValue()), false);
- }
-
- if (((SortedArraySet) entry.getValue()).isEmpty()) {
- objectiterator.remove();
- }
- }
-
+ // Paper - rewrite chunk system - this stupid hack ain't needed anymore
}
public boolean hasTickets() {
- return !this.tickets.isEmpty();
+ return this.getChunkHolderManager().hasTickets(); // Paper - rewrite chunk system
}
// CraftBukkit start
public <T> void removeAllTicketsFor(TicketType<T> ticketType, int ticketLevel, T ticketIdentifier) {
- Ticket<T> target = new Ticket<>(ticketType, ticketLevel, ticketIdentifier);
-
- for (java.util.Iterator<Entry<SortedArraySet<Ticket<?>>>> iterator = this.tickets.long2ObjectEntrySet().fastIterator(); iterator.hasNext();) {
- Entry<SortedArraySet<Ticket<?>>> entry = iterator.next();
- SortedArraySet<Ticket<?>> tickets = entry.getValue();
- if (tickets.remove(target)) {
- // copied from removeTicket
- this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt(tickets), false);
-
- // can't use entry after it's removed
- if (tickets.isEmpty()) {
- iterator.remove();
- }
- }
- }
+ this.getChunkHolderManager().removeAllTicketsFor(ticketType, ticketLevel, ticketIdentifier); // Paper - rewrite chunk system
}
// CraftBukkit end
+ /* Paper - rewrite chunk system
private class ChunkTicketTracker extends ChunkTracker {
public ChunkTicketTracker() {
@@ -487,6 +274,7 @@ public abstract class DistanceManager {
return this.runUpdates(distance);
}
}
+ */ // Paper - rewrite chunk system
private class FixedPlayerDistanceChunkTracker extends ChunkTracker {
@@ -566,6 +354,7 @@ public abstract class DistanceManager {
}
}
+ /* Paper - rewrite chunk system
private class PlayerTicketTracker extends DistanceManager.FixedPlayerDistanceChunkTracker {
private int viewDistance = 0;
@@ -661,4 +450,5 @@ public abstract class DistanceManager {
return distance <= this.viewDistance - 2;
}
}
+ */ // Paper - rewrite chunk system
}
diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
index 8c99e9d1cc1abf5a425846eb4edd52bf38aa2f75..b3cff10fece84839fe85feb297fafbcd4a02d838 100644
--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
@@ -366,7 +366,7 @@ public class ServerChunkCache extends ChunkSource {
public LevelChunk getChunkAtIfLoadedImmediately(int x, int z) {
long k = ChunkPos.asLong(x, z);
- if (Thread.currentThread() == this.mainThread) {
+ if (io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system
return this.getChunkAtIfLoadedMainThread(x, z);
}
@@ -388,11 +388,34 @@ public class ServerChunkCache extends ChunkSource {
return ret;
}
// Paper end
+ // Paper start - async chunk io
+ public CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getChunkAtAsynchronously(int x, int z, boolean gen, boolean isUrgent) {
+ CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> ret = new CompletableFuture<>();
+
+ ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority;
+ if (isUrgent) {
+ priority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.HIGHER;
+ } else {
+ priority = ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.NORMAL;
+ }
+
+ net.minecraft.server.ChunkSystem.scheduleChunkLoad(this.level, x, z, gen, ChunkStatus.FULL, true, priority, (chunk) -> {
+ if (chunk == null) {
+ ret.complete(ChunkHolder.UNLOADED_CHUNK);
+ } else {
+ ret.complete(Either.left(chunk));
+ }
+ });
+
+ return ret;
+ }
+ // Paper end - async chunk io
@Nullable
@Override
public ChunkAccess getChunk(int x, int z, ChunkStatus leastStatus, boolean create) {
- if (Thread.currentThread() != this.mainThread) {
+ final int x1 = x; final int z1 = z; // Paper - conflict on variable change
+ if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system
return (ChunkAccess) CompletableFuture.supplyAsync(() -> {
return this.getChunk(x, z, leastStatus, create);
}, this.mainThreadProcessor).join();
@@ -404,23 +427,20 @@ public class ServerChunkCache extends ChunkSource {
ChunkAccess ichunkaccess;
- for (int l = 0; l < 4; ++l) {
- if (k == this.lastChunkPos[l] && leastStatus == this.lastChunkStatus[l]) {
- ichunkaccess = this.lastChunk[l];
- if (ichunkaccess != null) { // CraftBukkit - the chunk can become accessible in the meantime TODO for non-null chunks it might also make sense to check that the chunk's state hasn't changed in the meantime
- return ichunkaccess;
- }
- }
- }
+ // Paper - rewrite chunk system - there are no correct callbacks to remove items from cache in the new chunk system
gameprofilerfiller.incrementCounter("getChunkCacheMiss");
- CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getChunkFutureMainThread(x, z, leastStatus, create);
+ CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getChunkFutureMainThread(x, z, leastStatus, create, true); // Paper
ServerChunkCache.MainThreadExecutor chunkproviderserver_b = this.mainThreadProcessor;
Objects.requireNonNull(completablefuture);
if (!completablefuture.isDone()) { // Paper
+ // Paper start - async chunk io/loading
+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.pushChunkWait(this.level, x1, z1); // Paper - rewrite chunk system
+ // Paper end
this.level.timings.syncChunkLoad.startTiming(); // Paper
chunkproviderserver_b.managedBlock(completablefuture::isDone);
+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.popChunkWait(); // Paper - async chunk debug // Paper - rewrite chunk system
this.level.timings.syncChunkLoad.stopTiming(); // Paper
} // Paper
ichunkaccess = (ChunkAccess) ((Either) completablefuture.join()).map((ichunkaccess1) -> {
@@ -440,7 +460,7 @@ public class ServerChunkCache extends ChunkSource {
@Nullable
@Override
public LevelChunk getChunkNow(int chunkX, int chunkZ) {
- if (Thread.currentThread() != this.mainThread) {
+ if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system
return null;
} else {
this.level.getProfiler().incrementCounter("getChunkNow");
@@ -486,7 +506,7 @@ public class ServerChunkCache extends ChunkSource {
}
public CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getChunkFuture(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) {
- boolean flag1 = Thread.currentThread() == this.mainThread;
+ boolean flag1 = io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system
CompletableFuture completablefuture;
if (flag1) {
@@ -507,47 +527,52 @@ public class ServerChunkCache extends ChunkSource {
}
private CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getChunkFutureMainThread(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) {
- ChunkPos chunkcoordintpair = new ChunkPos(chunkX, chunkZ);
- long k = chunkcoordintpair.toLong();
- int l = 33 + ChunkStatus.getDistance(leastStatus);
- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(k);
+ // Paper start - add isUrgent - old sig left in place for dirty nms plugins
+ return getChunkFutureMainThread(chunkX, chunkZ, leastStatus, create, false);
+ }
+ private CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> getChunkFutureMainThread(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create, boolean isUrgent) {
+ // Paper start - rewrite chunk system
+ io.papermc.paper.util.TickThread.ensureTickThread(this.level, chunkX, chunkZ, "Scheduling chunk load off-main");
+ int minLevel = 33 + ChunkStatus.getDistance(leastStatus);
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkX, chunkZ);
- // CraftBukkit start - don't add new ticket for currently unloading chunk
- boolean currentlyUnloading = false;
- if (playerchunk != null) {
- ChunkHolder.FullChunkStatus oldChunkState = ChunkHolder.getFullChunkStatus(playerchunk.oldTicketLevel);
- ChunkHolder.FullChunkStatus currentChunkState = ChunkHolder.getFullChunkStatus(playerchunk.getTicketLevel());
- currentlyUnloading = (oldChunkState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER) && !currentChunkState.isOrAfter(ChunkHolder.FullChunkStatus.BORDER));
- }
- if (create && !currentlyUnloading) {
- // CraftBukkit end
- this.distanceManager.addTicket(TicketType.UNKNOWN, chunkcoordintpair, l, chunkcoordintpair);
- if (this.chunkAbsent(playerchunk, l)) {
- ProfilerFiller gameprofilerfiller = this.level.getProfiler();
-
- gameprofilerfiller.push("chunkLoad");
- this.runDistanceManagerUpdates();
- playerchunk = this.getVisibleChunkIfPresent(k);
- gameprofilerfiller.pop();
- if (this.chunkAbsent(playerchunk, l)) {
- throw (IllegalStateException) Util.pauseInIde(new IllegalStateException("No chunk holder after ticket has been added"));
- }
- }
+ boolean needsFullScheduling = leastStatus == ChunkStatus.FULL && (chunkHolder == null || !chunkHolder.getChunkStatus().isOrAfter(ChunkHolder.FullChunkStatus.BORDER));
+
+ if ((chunkHolder == null || chunkHolder.getTicketLevel() > minLevel || needsFullScheduling) && !create) {
+ return ChunkHolder.UNLOADED_CHUNK_FUTURE;
}
- return this.chunkAbsent(playerchunk, l) ? ChunkHolder.UNLOADED_CHUNK_FUTURE : playerchunk.getOrScheduleFuture(leastStatus, this.chunkMap);
- }
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder.ChunkCompletion chunkCompletion = chunkHolder == null ? null : chunkHolder.getLastChunkCompletion();
+ if (needsFullScheduling || chunkCompletion == null || !chunkCompletion.genStatus().isOrAfter(leastStatus)) {
+ // schedule
+ CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> ret = new CompletableFuture<>();
+ Consumer<ChunkAccess> complete = (ChunkAccess chunk) -> {
+ if (chunk == null) {
+ ret.complete(Either.right(ChunkHolder.ChunkLoadingFailure.UNLOADED));
+ } else {
+ ret.complete(Either.left(chunk));
+ }
+ };
- private boolean chunkAbsent(@Nullable ChunkHolder holder, int maxLevel) {
- return holder == null || holder.oldTicketLevel > maxLevel; // CraftBukkit using oldTicketLevel for isLoaded checks
+ this.level.chunkTaskScheduler.scheduleChunkLoad(
+ chunkX, chunkZ, leastStatus, true,
+ isUrgent ? ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.BLOCKING : ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.NORMAL,
+ complete
+ );
+
+ return ret;
+ } else {
+ // can return now
+ return CompletableFuture.completedFuture(Either.left(chunkCompletion.chunk()));
+ }
+ // Paper end - rewrite chunk system
}
+ // Paper - rewrite chunk system
+
@Override
public boolean hasChunk(int x, int z) {
- ChunkHolder playerchunk = this.getVisibleChunkIfPresent((new ChunkPos(x, z)).toLong());
- int k = 33 + ChunkStatus.getDistance(ChunkStatus.FULL);
-
- return !this.chunkAbsent(playerchunk, k);
+ return this.getChunkAtIfLoadedImmediately(x, z) != null; // Paper - rewrite chunk system
}
@Override
@@ -558,22 +583,13 @@ public class ServerChunkCache extends ChunkSource {
if (playerchunk == null) {
return null;
} else {
- int l = ServerChunkCache.CHUNK_STATUSES.size() - 1;
-
- while (true) {
- ChunkStatus chunkstatus = (ChunkStatus) ServerChunkCache.CHUNK_STATUSES.get(l);
- Optional<ChunkAccess> optional = ((Either) playerchunk.getFutureIfPresentUnchecked(chunkstatus).getNow(ChunkHolder.UNLOADED_CHUNK)).left();
-
- if (optional.isPresent()) {
- return (BlockGetter) optional.get();
- }
-
- if (chunkstatus == ChunkStatus.LIGHT.getParent()) {
- return null;
- }
-
- --l;
+ // Paper start - rewrite chunk system
+ ChunkStatus status = playerchunk.getChunkHolderStatus();
+ if (status != null && !status.isOrAfter(ChunkStatus.LIGHT.getParent())) {
+ return null;
}
+ return playerchunk.getAvailableChunkNow();
+ // Paper end - rewrite chunk system
}
}
@@ -587,15 +603,7 @@ public class ServerChunkCache extends ChunkSource {
}
public boolean runDistanceManagerUpdates() {
- boolean flag = this.distanceManager.runAllUpdates(this.chunkMap);
- boolean flag1 = this.chunkMap.promoteChunkMap();
-
- if (!flag && !flag1) {
- return false;
- } else {
- this.clearCache();
- return true;
- }
+ return this.level.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); // Paper - rewrite chunk system
}
// Paper start
@@ -605,17 +613,10 @@ public class ServerChunkCache extends ChunkSource {
// Paper end
public boolean isPositionTicking(long pos) {
- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos);
-
- if (playerchunk == null) {
- return false;
- } else if (!this.level.shouldTickBlocksAt(pos)) {
- return false;
- } else {
- Either<LevelChunk, ChunkHolder.ChunkLoadingFailure> either = (Either) playerchunk.getTickingChunkFuture().getNow(null); // CraftBukkit - decompile error
-
- return either != null && either.left().isPresent();
- }
+ // Paper start - replace player chunk loader system
+ ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(pos);
+ return holder != null && holder.isTickingReady();
+ // Paper end - replace player chunk loader system
}
public void save(boolean flush) {
@@ -631,17 +632,13 @@ public class ServerChunkCache extends ChunkSource {
this.close(true);
}
- public void close(boolean save) throws IOException {
- if (save) {
- this.save(true);
- }
- // CraftBukkit end
- this.lightEngine.close();
- this.chunkMap.close();
+ public void close(boolean save) { // Paper - rewrite chunk system
+ this.level.chunkTaskScheduler.chunkHolderManager.close(save, true); // Paper - rewrite chunk system
}
// CraftBukkit start - modelled on below
public void purgeUnload() {
+ if (true) return; // Paper - tickets will be removed later, this behavior isn't really well accounted for by the chunk system
this.level.getProfiler().push("purge");
this.distanceManager.purgeStaleTickets();
this.runDistanceManagerUpdates();
@@ -662,6 +659,7 @@ public class ServerChunkCache extends ChunkSource {
this.level.getProfiler().popPush("chunks");
if (tickChunks) {
this.level.timings.chunks.startTiming(); // Paper - timings
+ this.chunkMap.playerChunkManager.tick(); // Paper - this is mostly is to account for view distance changes
this.tickChunks();
this.level.timings.chunks.stopTiming(); // Paper - timings
}
@@ -758,7 +756,12 @@ public class ServerChunkCache extends ChunkSource {
ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos);
if (playerchunk != null) {
- ((Either) playerchunk.getFullChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).left().ifPresent(chunkConsumer);
+ // Paper start - rewrite chunk system
+ LevelChunk chunk = playerchunk.getFullChunk();
+ if (chunk != null) {
+ chunkConsumer.accept(chunk);
+ }
+ // Paper end - rewrite chunk system
}
}
@@ -920,17 +923,11 @@ public class ServerChunkCache extends ChunkSource {
@Override
// CraftBukkit start - process pending Chunk loadCallback() and unloadCallback() after each run task
public boolean pollTask() {
- try {
+ ServerChunkCache.this.chunkMap.playerChunkManager.tickMidTick();
if (ServerChunkCache.this.runDistanceManagerUpdates()) {
return true;
- } else {
- ServerChunkCache.this.lightEngine.tryScheduleUpdate();
- return super.pollTask();
}
- } finally {
- chunkMap.callbackExecutor.run();
- }
- // CraftBukkit end
+ return super.pollTask() | ServerChunkCache.this.level.chunkTaskScheduler.executeMainThreadTask(); // Paper - rewrite chunk system
}
}
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 99d44faab5b5da244fdc170c73d73723c174c8fd..7c709be5d43bcd45064c79e84d5b2fff0b3d0cfe 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -190,7 +190,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
private final MinecraftServer server;
public final PrimaryLevelData serverLevelData; // CraftBukkit - type
final EntityTickList entityTickList;
- public final PersistentEntitySectionManager<Entity> entityManager;
+ //public final PersistentEntitySectionManager<Entity> entityManager; // Paper - rewrite chunk system
public boolean noSave;
private final SleepStatus sleepStatus;
private int emptyTime;
@@ -315,7 +315,108 @@ public class ServerLevel extends Level implements WorldGenLevel {
}
}
}
- // Paper end
+
+ // Paper start - rewrite chunk system
+ public final io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler chunkTaskScheduler;
+ public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController chunkDataControllerNew
+ = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA) {
+
+ @Override
+ public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() {
+ return ServerLevel.this.getChunkSource().chunkMap.regionFileCache;
+ }
+
+ @Override
+ public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException {
+ ServerLevel.this.getChunkSource().chunkMap.write(new ChunkPos(chunkX, chunkZ), compound);
+ }
+
+ @Override
+ public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException {
+ return ServerLevel.this.getChunkSource().chunkMap.readSync(new ChunkPos(chunkX, chunkZ));
+ }
+ };
+ public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController poiDataControllerNew
+ = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA) {
+
+ @Override
+ public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() {
+ return ServerLevel.this.getChunkSource().chunkMap.getPoiManager();
+ }
+
+ @Override
+ public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException {
+ ServerLevel.this.getChunkSource().chunkMap.getPoiManager().write(new ChunkPos(chunkX, chunkZ), compound);
+ }
+
+ @Override
+ public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException {
+ return ServerLevel.this.getChunkSource().chunkMap.getPoiManager().read(new ChunkPos(chunkX, chunkZ));
+ }
+ };
+ public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController entityDataControllerNew
+ = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA) {
+
+ @Override
+ public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() {
+ return ServerLevel.this.entityStorage;
+ }
+
+ @Override
+ public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException {
+ ServerLevel.this.writeEntityChunk(chunkX, chunkZ, compound);
+ }
+
+ @Override
+ public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException {
+ return ServerLevel.this.readEntityChunk(chunkX, chunkZ);
+ }
+ };
+ private final EntityRegionFileStorage entityStorage;
+
+ private static final class EntityRegionFileStorage extends net.minecraft.world.level.chunk.storage.RegionFileStorage {
+
+ public EntityRegionFileStorage(Path directory, boolean dsync) {
+ super(directory, dsync);
+ }
+
+ protected void write(ChunkPos pos, net.minecraft.nbt.CompoundTag nbt) throws IOException {
+ ChunkPos nbtPos = nbt == null ? null : EntityStorage.readChunkPos(nbt);
+ if (nbtPos != null && !pos.equals(nbtPos)) {
+ throw new IllegalArgumentException(
+ "Entity chunk coordinate and serialized data do not have matching coordinates, trying to serialize coordinate " + pos.toString()
+ + " but compound says coordinate is " + nbtPos + " for world: " + this
+ );
+ }
+ super.write(pos, nbt);
+ }
+ }
+
+ private void writeEntityChunk(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException {
+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) {
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave(
+ this, chunkX, chunkZ, compound,
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA);
+ return;
+ }
+ this.entityStorage.write(new ChunkPos(chunkX, chunkZ), compound);
+ }
+
+ private net.minecraft.nbt.CompoundTag readEntityChunk(int chunkX, int chunkZ) throws IOException {
+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) {
+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData(
+ this, chunkX, chunkZ, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA,
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread()
+ );
+ }
+ return this.entityStorage.read(new ChunkPos(chunkX, chunkZ));
+ }
+
+ private final io.papermc.paper.chunk.system.entity.EntityLookup entityLookup;
+ public final io.papermc.paper.chunk.system.entity.EntityLookup getEntityLookup() {
+ return this.entityLookup;
+ }
+ // Paper end - rewrite chunk system
// Add env and gen to constructor, IWorldDataServer -> WorldDataServer
public ServerLevel(MinecraftServer minecraftserver, Executor executor, LevelStorageSource.LevelStorageAccess convertable_conversionsession, PrimaryLevelData iworlddataserver, ResourceKey<Level> resourcekey, LevelStem worlddimension, ChunkProgressListener worldloadlistener, boolean flag, long i, List<CustomSpawner> list, boolean flag1, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider) {
@@ -359,16 +460,16 @@ public class ServerLevel extends Level implements WorldGenLevel {
// CraftBukkit end
boolean flag2 = minecraftserver.forceSynchronousWrites();
DataFixer datafixer = minecraftserver.getFixerUpper();
- EntityPersistentStorage<Entity> entitypersistentstorage = new EntityStorage(this, convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), datafixer, flag2, minecraftserver);
+ this.entityStorage = new EntityRegionFileStorage(convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), flag2); // Paper - rewrite chunk system //EntityPersistentStorage<Entity> entitypersistentstorage = new EntityStorage(this, convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), datafixer, flag2, minecraftserver);
- this.entityManager = new PersistentEntitySectionManager<>(Entity.class, new ServerLevel.EntityCallbacks(), entitypersistentstorage);
+ // this.entityManager = new PersistentEntitySectionManager<>(Entity.class, new ServerLevel.EntityCallbacks(), entitypersistentstorage, this.entitySliceManager); // Paper // Paper - rewrite chunk system
StructureTemplateManager structuretemplatemanager = minecraftserver.getStructureManager();
int j = this.spigotConfig.viewDistance; // Spigot
int k = this.spigotConfig.simulationDistance; // Spigot
- PersistentEntitySectionManager persistententitysectionmanager = this.entityManager;
+ //PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; // Paper - rewrite chunk system
- Objects.requireNonNull(this.entityManager);
- this.chunkSource = new ServerChunkCache(this, convertable_conversionsession, datafixer, structuretemplatemanager, executor, chunkgenerator, j, k, flag2, worldloadlistener, persistententitysectionmanager::updateChunkStatus, () -> {
+ //Objects.requireNonNull(this.entityManager); // Paper - rewrite chunk system
+ this.chunkSource = new ServerChunkCache(this, convertable_conversionsession, datafixer, structuretemplatemanager, executor, chunkgenerator, j, k, flag2, worldloadlistener, null, () -> { // Paper - rewrite chunk system
return minecraftserver.overworld().getDataStorage();
});
chunkgenerator.ensureStructuresGenerated(this.chunkSource.randomState());
@@ -397,6 +498,9 @@ public class ServerLevel extends Level implements WorldGenLevel {
this.sleepStatus = new SleepStatus();
this.getCraftServer().addWorld(this.getWorld()); // CraftBukkit
+
+ this.chunkTaskScheduler = new io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler(this, io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.workerThreads); // Paper - rewrite chunk system
+ this.entityLookup = new io.papermc.paper.chunk.system.entity.EntityLookup(this, new EntityCallbacks()); // Paper - rewrite chunk system
}
public void setWeatherParameters(int clearDuration, int rainDuration, boolean raining, boolean thundering) {
@@ -500,7 +604,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
gameprofilerfiller.push("checkDespawn");
entity.checkDespawn();
gameprofilerfiller.pop();
- if (this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(entity.chunkPosition().toLong())) {
+ if (true || this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(entity.chunkPosition().toLong())) { // Paper - now always true if in the ticking list
Entity entity1 = entity.getVehicle();
if (entity1 != null) {
@@ -525,7 +629,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
}
gameprofilerfiller.push("entityManagement");
- this.entityManager.tick();
+ //this.entityManager.tick(); // Paper - rewrite chunk system
gameprofilerfiller.popPush("gameEvents");
this.sendGameEvents();
gameprofilerfiller.pop();
@@ -533,7 +637,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
@Override
public boolean shouldTickBlocksAt(long chunkPos) {
- return this.chunkSource.chunkMap.getDistanceManager().inBlockTickingRange(chunkPos);
+ // Paper start - replace player chunk loader system
+ ChunkHolder holder = this.chunkSource.chunkMap.getVisibleChunkIfPresent(chunkPos);
+ return holder != null && holder.isTickingReady();
+ // Paper end - replace player chunk loader system
}
protected void tickTime() {
@@ -975,6 +1082,11 @@ public class ServerLevel extends Level implements WorldGenLevel {
}
public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled) {
+ // Paper start - rewrite chunk system - add close param
+ this.save(progressListener, flush, savingDisabled, false);
+ }
+ public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled, boolean close) {
+ // Paper end - rewrite chunk system - add close param
ServerChunkCache chunkproviderserver = this.getChunkSource();
if (!savingDisabled) {
@@ -990,16 +1102,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
}
timings.worldSaveChunks.startTiming(); // Paper
- chunkproviderserver.save(flush);
+ if (!close) chunkproviderserver.save(flush); // Paper - rewrite chunk system
+ if (close) chunkproviderserver.close(true); // Paper - rewrite chunk system
timings.worldSaveChunks.stopTiming(); // Paper
}// Paper
- if (flush) {
- this.entityManager.saveAll();
- } else {
- this.entityManager.autoSave();
- }
+ // Paper - rewrite chunk system - entity saving moved into ChunkHolder
- }
+ } else if (close) { chunkproviderserver.close(false); } // Paper - rewrite chunk system
// CraftBukkit start - moved from MinecraftServer.saveChunks
ServerLevel worldserver1 = this;
@@ -1116,7 +1225,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
this.removePlayerImmediately((ServerPlayer) entity, Entity.RemovalReason.DISCARDED);
}
- this.entityManager.addNewEntity(player);
+ this.entityLookup.addNewEntity(player); // Paper - rewite chunk system
}
// CraftBukkit start
@@ -1132,7 +1241,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
}
// CraftBukkit end
- return this.entityManager.addNewEntity(entity);
+ return this.entityLookup.addNewEntity(entity); // Paper - rewrite chunk system
}
}
@@ -1144,10 +1253,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
public boolean tryAddFreshEntityWithPassengers(Entity entity, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason) {
// CraftBukkit end
Stream<UUID> stream = entity.getSelfAndPassengers().map(Entity::getUUID); // CraftBukkit - decompile error
- PersistentEntitySectionManager persistententitysectionmanager = this.entityManager;
+ //PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; // Paper - rewrite chunk system
- Objects.requireNonNull(this.entityManager);
- if (stream.anyMatch(persistententitysectionmanager::isLoaded)) {
+ //Objects.requireNonNull(this.entityManager); // Paper - rewrite chunk system
+ if (stream.anyMatch(this.entityLookup::hasEntity)) { // Paper - rewrite chunk system
return false;
} else {
this.addFreshEntityWithPassengers(entity, reason); // CraftBukkit
@@ -1731,7 +1840,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
}
}
- bufferedwriter.write(String.format(Locale.ROOT, "entities: %s\n", this.entityManager.gatherStats()));
+ bufferedwriter.write(String.format(Locale.ROOT, "entities: %s\n", this.entityLookup.getDebugInfo())); // Paper - rewrite chunk system
bufferedwriter.write(String.format(Locale.ROOT, "block_entity_tickers: %d\n", this.blockEntityTickers.size()));
bufferedwriter.write(String.format(Locale.ROOT, "block_ticks: %d\n", this.getBlockTicks().count()));
bufferedwriter.write(String.format(Locale.ROOT, "fluid_ticks: %d\n", this.getFluidTicks().count()));
@@ -1780,7 +1889,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
BufferedWriter bufferedwriter2 = Files.newBufferedWriter(path1);
try {
- playerchunkmap.dumpChunks(bufferedwriter2);
+ //playerchunkmap.dumpChunks(bufferedwriter2); // Paper - rewrite chunk system
} catch (Throwable throwable4) {
if (bufferedwriter2 != null) {
try {
@@ -1801,7 +1910,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
BufferedWriter bufferedwriter3 = Files.newBufferedWriter(path2);
try {
- this.entityManager.dumpSections(bufferedwriter3);
+ //this.entityManager.dumpSections(bufferedwriter3); // Paper - rewrite chunk system
} catch (Throwable throwable6) {
if (bufferedwriter3 != null) {
try {
@@ -1943,7 +2052,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
@VisibleForTesting
public String getWatchdogStats() {
- return String.format(Locale.ROOT, "players: %s, entities: %s [%s], block_entities: %d [%s], block_ticks: %d, fluid_ticks: %d, chunk_source: %s", this.players.size(), this.entityManager.gatherStats(), ServerLevel.getTypeCount(this.entityManager.getEntityGetter().getAll(), (entity) -> {
+ return String.format(Locale.ROOT, "players: %s, entities: %s [%s], block_entities: %d [%s], block_ticks: %d, fluid_ticks: %d, chunk_source: %s", this.players.size(), this.entityLookup.getDebugInfo(), ServerLevel.getTypeCount(this.entityLookup.getAll(), (entity) -> { // Paper - rewrite chunk system
return Registry.ENTITY_TYPE.getKey(entity.getType()).toString();
}), this.blockEntityTickers.size(), ServerLevel.getTypeCount(this.blockEntityTickers, TickingBlockEntity::getType), this.getBlockTicks().count(), this.getFluidTicks().count(), this.gatherChunkSourceStats());
}
@@ -2003,15 +2112,15 @@ public class ServerLevel extends Level implements WorldGenLevel {
@Override
public LevelEntityGetter<Entity> getEntities() {
org.spigotmc.AsyncCatcher.catchOp("Chunk getEntities call"); // Spigot
- return this.entityManager.getEntityGetter();
+ return this.entityLookup; // Paper - rewrite chunk system
}
public void addLegacyChunkEntities(Stream<Entity> entities) {
- this.entityManager.addLegacyChunkEntities(entities);
+ this.entityLookup.addLegacyChunkEntities(entities.toList()); // Paper - rewrite chunk system
}
public void addWorldGenChunkEntities(Stream<Entity> entities) {
- this.entityManager.addWorldGenChunkEntities(entities);
+ this.entityLookup.addWorldGenChunkEntities(entities.toList()); // Paper - rewrite chunk system
}
public void startTickingChunk(LevelChunk chunk) {
@@ -2027,34 +2136,49 @@ public class ServerLevel extends Level implements WorldGenLevel {
@Override
public void close() throws IOException {
super.close();
- this.entityManager.close();
+ //this.entityManager.close(); // Paper - rewrite chunk system
}
@Override
public String gatherChunkSourceStats() {
String s = this.chunkSource.gatherStats();
- return "Chunks[S] W: " + s + " E: " + this.entityManager.gatherStats();
+ return "Chunks[S] W: " + s + " E: " + this.entityLookup.getDebugInfo(); // Paper - rewrite chunk system
}
public boolean areEntitiesLoaded(long chunkPos) {
- return this.entityManager.areEntitiesLoaded(chunkPos);
+ // Paper start - rewrite chunk system
+ return this.getChunkIfLoadedImmediately(ChunkPos.getX(chunkPos), ChunkPos.getZ(chunkPos)) != null;
+ // Paper end - rewrite chunk system
}
private boolean isPositionTickingWithEntitiesLoaded(long chunkPos) {
- return this.areEntitiesLoaded(chunkPos) && this.chunkSource.isPositionTicking(chunkPos);
+ // Paper start - optimize is ticking ready type functions
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkPos);
+ // isTicking implies the chunk is loaded, and the chunk is loaded now implies the entities are loaded
+ return chunkHolder != null && chunkHolder.isTickingReady();
+ // Paper end
}
public boolean isPositionEntityTicking(BlockPos pos) {
- return this.entityManager.canPositionTick(pos) && this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(ChunkPos.asLong(pos));
+ // Paper start - rewrite chunk system
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos));
+ return chunkHolder != null && chunkHolder.isEntityTickingReady();
+ // Paper end - rewrite chunk system
}
public boolean isNaturalSpawningAllowed(BlockPos pos) {
- return this.entityManager.canPositionTick(pos);
+ // Paper start - rewrite chunk system
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos));
+ return chunkHolder != null && chunkHolder.isEntityTickingReady();
+ // Paper end - rewrite chunk system
}
public boolean isNaturalSpawningAllowed(ChunkPos pos) {
- return this.entityManager.canPositionTick(pos);
+ // Paper start - rewrite chunk system
+ io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos));
+ return chunkHolder != null && chunkHolder.isEntityTickingReady();
+ // Paper end - rewrite chunk system
}
private final class EntityCallbacks implements LevelCallback<Entity> {
diff --git a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
index 3fb8d2626a1ef097c05fa5810bc1e051b4a6ad44..63d1a121a97a8dbc9b640d21580b084898a232bf 100644
--- a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
+++ b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
@@ -36,15 +36,14 @@ import net.minecraft.world.level.chunk.ChunkStatus;
public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCloseable {
private static final Logger LOGGER = LogUtils.getLogger();
- private final ProcessorMailbox<Runnable> taskMailbox;
- private final ObjectList<Pair<ThreadedLevelLightEngine.TaskType, Runnable>> lightTasks = new ObjectArrayList<>();
+ // Paper - rewrite chunk system
private final ChunkMap chunkMap;
- private final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> sorterMailbox;
+ // Paper - rewrite chunk system
private volatile int taskPerBatch = 5;
- private final AtomicBoolean scheduled = new AtomicBoolean();
+ // Paper - rewrite chunk system
// Paper start - replace light engine impl
- protected final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine;
+ public final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine;
public final boolean hasBlockLight;
public final boolean hasSkyLight;
// Paper end - replace light engine impl
@@ -52,8 +51,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
public ThreadedLevelLightEngine(LightChunkGetter chunkProvider, ChunkMap chunkStorage, boolean hasBlockLight, ProcessorMailbox<Runnable> processor, ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> executor) {
super(chunkProvider, false, false); // Paper - destroy vanilla light engine state
this.chunkMap = chunkStorage;
- this.sorterMailbox = executor;
- this.taskMailbox = processor;
+ // Paper - rewrite chunk system
// Paper start - replace light engine impl
this.hasBlockLight = true;
this.hasSkyLight = hasBlockLight; // Nice variable name.
@@ -97,7 +95,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
++totalChunks;
}
- this.taskMailbox.tell(() -> {
+ this.chunkMap.level.chunkTaskScheduler.lightExecutor.queueRunnable(() -> { // Paper - rewrite chunk system
this.theLightEngine.relightChunks(chunks, (ChunkPos chunkPos) -> {
chunkLightCallback.accept(chunkPos);
((java.util.concurrent.Executor)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(() -> {
@@ -269,17 +267,11 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
}
private void addTask(int x, int z, ThreadedLevelLightEngine.TaskType stage, Runnable task) {
- this.addTask(x, z, this.chunkMap.getChunkQueueLevel(ChunkPos.asLong(x, z)), stage, task);
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
private void addTask(int x, int z, IntSupplier completedLevelSupplier, ThreadedLevelLightEngine.TaskType stage, Runnable task) {
- this.sorterMailbox.tell(ChunkTaskPriorityQueueSorter.message(() -> {
- this.lightTasks.add(Pair.of(stage, task));
- if (this.lightTasks.size() >= this.taskPerBatch) {
- this.runUpdate();
- }
-
- }, ChunkPos.asLong(x, z), completedLevelSupplier));
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
@Override
@@ -337,74 +329,15 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
}
});
}
- // Paper end - replace light engine impl
- ChunkPos chunkPos = chunk.getPos();
- chunk.setLightCorrect(false);
- this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
- LevelChunkSection[] levelChunkSections = chunk.getSections();
-
- for(int i = 0; i < chunk.getSectionsCount(); ++i) {
- LevelChunkSection levelChunkSection = levelChunkSections[i];
- if (!levelChunkSection.hasOnlyAir()) {
- int j = this.levelHeightAccessor.getSectionYFromSectionIndex(i);
- super.updateSectionStatus(SectionPos.of(chunkPos, j), false);
- }
- }
-
- super.enableLightSources(chunkPos, true);
- if (!excludeBlocks) {
- chunk.getLights().forEach((pos) -> {
- super.onBlockEmissionIncrease(pos, chunk.getLightEmission(pos));
- });
- }
-
- }, () -> {
- return "lightChunk " + chunkPos + " " + excludeBlocks;
- }));
- return CompletableFuture.supplyAsync(() -> {
- chunk.setLightCorrect(true);
- super.retainData(chunkPos, false);
- this.chunkMap.releaseLightTicket(chunkPos);
- return chunk;
- }, (runnable) -> {
- this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.POST_UPDATE, runnable);
- });
+ throw new InternalError(); // Paper - rewrite chunk system
}
public void tryScheduleUpdate() {
- if (this.hasLightWork() && this.scheduled.compareAndSet(false, true)) { // Paper // Paper - rewrite light engine
- this.taskMailbox.tell(() -> {
- this.runUpdate();
- this.scheduled.set(false);
- });
- }
-
+ // Paper - rewrite chunk system
}
private void runUpdate() {
- int i = Math.min(this.lightTasks.size(), this.taskPerBatch);
- ObjectListIterator<Pair<ThreadedLevelLightEngine.TaskType, Runnable>> objectListIterator = this.lightTasks.iterator();
-
- int j;
- for(j = 0; objectListIterator.hasNext() && j < i; ++j) {
- Pair<ThreadedLevelLightEngine.TaskType, Runnable> pair = objectListIterator.next();
- if (pair.getFirst() == ThreadedLevelLightEngine.TaskType.PRE_UPDATE) {
- pair.getSecond().run();
- }
- }
-
- objectListIterator.back(j);
- this.theLightEngine.propagateChanges(); // Paper - rewrite light engine
-
- for(int var5 = 0; objectListIterator.hasNext() && var5 < i; ++var5) {
- Pair<ThreadedLevelLightEngine.TaskType, Runnable> pair2 = objectListIterator.next();
- if (pair2.getFirst() == ThreadedLevelLightEngine.TaskType.POST_UPDATE) {
- pair2.getSecond().run();
- }
-
- objectListIterator.remove();
- }
-
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
public void setTaskPerBatch(int taskBatchSize) {
diff --git a/src/main/java/net/minecraft/server/level/Ticket.java b/src/main/java/net/minecraft/server/level/Ticket.java
index ffc43e5d3d0563c9e9c171064511b2c65ddf67e1..768a2667f950a635a562fa8a0c75b31a3ae9190e 100644
--- a/src/main/java/net/minecraft/server/level/Ticket.java
+++ b/src/main/java/net/minecraft/server/level/Ticket.java
@@ -6,9 +6,12 @@ public final class Ticket<T> implements Comparable<Ticket<?>> {
private final TicketType<T> type;
private final int ticketLevel;
public final T key;
- public long createdTick;
+ // Paper start - rewrite chunk system
+ public final long removalTick;
- protected Ticket(TicketType<T> type, int level, T argument) {
+ public Ticket(TicketType<T> type, int level, T argument, long removalTick) {
+ this.removalTick = removalTick;
+ // Paper end - rewrite chunk system
this.type = type;
this.ticketLevel = level;
this.key = argument;
@@ -44,7 +47,7 @@ public final class Ticket<T> implements Comparable<Ticket<?>> {
@Override
public String toString() {
- return "Ticket[" + this.type + " " + this.ticketLevel + " (" + this.key + ")] at " + this.createdTick;
+ return "Ticket[" + this.type + " " + this.ticketLevel + " (" + this.key + ")] to die on " + this.removalTick; // Paper - rewrite chunk system
}
public TicketType<T> getType() {
@@ -56,11 +59,10 @@ public final class Ticket<T> implements Comparable<Ticket<?>> {
}
protected void setCreatedTick(long tickCreated) {
- this.createdTick = tickCreated;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
protected boolean timedOut(long currentTick) {
- long l = this.type.timeout();
- return l != 0L && currentTick - this.createdTick > l;
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
}
diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java
index 6051e5f272838ef23276a90e21c2fc821ca155d1..97d1ff2af23bac14e67bca5896843325aaa5bfc1 100644
--- a/src/main/java/net/minecraft/server/level/TicketType.java
+++ b/src/main/java/net/minecraft/server/level/TicketType.java
@@ -8,6 +8,7 @@ import net.minecraft.world.level.ChunkPos;
public class TicketType<T> {
public static final TicketType<Long> FUTURE_AWAIT = create("future_await", Long::compareTo); // Paper
+ public static final TicketType<Long> ASYNC_LOAD = create("async_load", Long::compareTo); // Paper
private final String name;
private final Comparator<T> comparator;
@@ -27,6 +28,13 @@ public class TicketType<T> {
public static final TicketType<Unit> PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit
public static final TicketType<org.bukkit.plugin.Plugin> PLUGIN_TICKET = TicketType.create("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // CraftBukkit
public static final TicketType<Long> CHUNK_RELIGHT = create("light_update", Long::compareTo); // Paper - ensure chunks stay loaded for lighting
+ // Paper start - rewrite chunk system
+ public static final TicketType<Long> CHUNK_LOAD = create("chunk_load", Long::compareTo);
+ public static final TicketType<Long> STATUS_UPGRADE = create("status_upgrade", Long::compareTo);
+ public static final TicketType<Long> ENTITY_LOAD = create("entity_load", Long::compareTo);
+ public static final TicketType<Long> POI_LOAD = create("poi_load", Long::compareTo);
+ public static final TicketType<Unit> UNLOAD_COOLDOWN = create("unload_cooldown", (u1, u2) -> 0, 5 * 20);
+ // Paper end - rewrite chunk system
public static <T> TicketType<T> create(String name, Comparator<T> argumentComparator) {
return new TicketType<>(name, argumentComparator, 0L);
diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
index 32d6e4b194c3c4eca7009059f8d185896b5ae556..51d3150e732f95be13f5f54d994dab1fa89ed3f2 100644
--- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java
+++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
@@ -498,4 +498,21 @@ public class WorldGenRegion implements WorldGenLevel {
public long nextSubTickCount() {
return this.subTickCount.getAndIncrement();
}
+
+ // Paper start
+ // No-op, this class doesn't provide entity access
+ @Override
+ public List<Entity> getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate) {
+ return Collections.emptyList();
+ }
+
+ @Override
+ public void getEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into) {}
+
+ @Override
+ public void getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into) {}
+
+ @Override
+ public <T> void getEntitiesByClass(Class<? extends T> clazz, Entity except, AABB box, List<? super T> into, Predicate<? super T> predicate) {}
+ // Paper end
}
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 4e7db441f68019d6e5d3359605b76bc4b258e87e..22c095539425a6667b8e7f5c5f0a8ff2e87adfb5 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -784,6 +784,13 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
this.disconnect(Component.translatable("disconnect.spam"));
return;
}
+ // Paper start
+ String str = packet.getCommand(); int index = -1;
+ if (str.length() > 64 && ((index = str.indexOf(' ')) == -1 || index >= 64)) {
+ server.scheduleOnMain(() -> this.disconnect(Component.translatable("disconnect.spam", new Object[0]))); // Paper
+ return;
+ }
+ // Paper end
// CraftBukkit end
StringReader stringreader = new StringReader(packet.getCommand());
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index e7fcb402e3d4e0707a28505a9fb6642764034e23..3235d6f98794709a53208e20ef33f2164725be48 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -245,7 +245,7 @@ public abstract class PlayerList {
boolean flag1 = gamerules.getBoolean(GameRules.RULE_REDUCEDDEBUGINFO);
// Spigot - view distance
- playerconnection.send(new ClientboundLoginPacket(player.getId(), worlddata.isHardcore(), player.gameMode.getGameModeForPlayer(), player.gameMode.getPreviousGameModeForPlayer(), this.server.levelKeys(), this.registryHolder, worldserver1.dimensionTypeId(), worldserver1.dimension(), BiomeManager.obfuscateSeed(worldserver1.getSeed()), this.getMaxPlayers(), worldserver1.spigotConfig.viewDistance, worldserver1.spigotConfig.simulationDistance, flag1, !flag, worldserver1.isDebug(), worldserver1.isFlat(), player.getLastDeathLocation()));
+ playerconnection.send(new ClientboundLoginPacket(player.getId(), worlddata.isHardcore(), player.gameMode.getGameModeForPlayer(), player.gameMode.getPreviousGameModeForPlayer(), this.server.levelKeys(), this.registryHolder, worldserver1.dimensionTypeId(), worldserver1.dimension(), BiomeManager.obfuscateSeed(worldserver1.getSeed()), this.getMaxPlayers(), worldserver1.getChunkSource().chunkMap.playerChunkManager.getTargetSendDistance(), worldserver1.getChunkSource().chunkMap.playerChunkManager.getTargetTickViewDistance(), flag1, !flag, worldserver1.isDebug(), worldserver1.isFlat(), player.getLastDeathLocation())); // Paper - replace old player chunk management
player.getBukkitEntity().sendSupportedChannels(); // CraftBukkit
playerconnection.send(new ClientboundCustomPayloadPacket(ClientboundCustomPayloadPacket.BRAND, (new FriendlyByteBuf(Unpooled.buffer())).writeUtf(this.getServer().getServerModName())));
playerconnection.send(new ClientboundChangeDifficultyPacket(worlddata.getDifficulty(), worlddata.isDifficultyLocked()));
@@ -773,8 +773,8 @@ public abstract class PlayerList {
// CraftBukkit start
LevelData worlddata = worldserver1.getLevelData();
entityplayer1.connection.send(new ClientboundRespawnPacket(worldserver1.dimensionTypeId(), worldserver1.dimension(), BiomeManager.obfuscateSeed(worldserver1.getSeed()), entityplayer1.gameMode.getGameModeForPlayer(), entityplayer1.gameMode.getPreviousGameModeForPlayer(), worldserver1.isDebug(), worldserver1.isFlat(), flag, entityplayer1.getLastDeathLocation()));
- entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.spigotConfig.viewDistance)); // Spigot
- entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.spigotConfig.simulationDistance)); // Spigot
+ entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.getChunkSource().chunkMap.playerChunkManager.getTargetSendDistance())); // Spigot // Paper - replace old player chunk management
+ entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.getChunkSource().chunkMap.playerChunkManager.getTargetTickViewDistance())); // Spigot // Paper - replace old player chunk management
entityplayer1.spawnIn(worldserver1);
entityplayer1.unsetRemoved();
entityplayer1.connection.teleport(new Location(worldserver1.getWorld(), entityplayer1.getX(), entityplayer1.getY(), entityplayer1.getZ(), entityplayer1.getYRot(), entityplayer1.getXRot()));
@@ -1280,7 +1280,7 @@ public abstract class PlayerList {
public void setViewDistance(int viewDistance) {
this.viewDistance = viewDistance;
- this.broadcastAll(new ClientboundSetChunkCacheRadiusPacket(viewDistance));
+ //this.broadcastAll(new ClientboundSetChunkCacheRadiusPacket(viewDistance)); // Paper - move into setViewDistance
Iterator iterator = this.server.getAllLevels().iterator();
while (iterator.hasNext()) {
@@ -1295,7 +1295,7 @@ public abstract class PlayerList {
public void setSimulationDistance(int simulationDistance) {
this.simulationDistance = simulationDistance;
- this.broadcastAll(new ClientboundSetSimulationDistancePacket(simulationDistance));
+ //this.broadcastAll(new ClientboundSetSimulationDistancePacket(simulationDistance)); // Paper - handled by playerchunkloader
Iterator iterator = this.server.getAllLevels().iterator();
while (iterator.hasNext()) {
diff --git a/src/main/java/net/minecraft/util/SortedArraySet.java b/src/main/java/net/minecraft/util/SortedArraySet.java
index d1b2ba24ef54e01c6249c3b2ca16e80f03c001a6..5fcbb4fd003603408c48408230a17b692fabd519 100644
--- a/src/main/java/net/minecraft/util/SortedArraySet.java
+++ b/src/main/java/net/minecraft/util/SortedArraySet.java
@@ -22,6 +22,41 @@ public class SortedArraySet<T> extends AbstractSet<T> {
this.contents = (T[])castRawArray(new Object[initialCapacity]);
}
}
+ // Paper start - optimise removeIf
+ @Override
+ public boolean removeIf(java.util.function.Predicate<? super T> filter) {
+ // prev. impl used an iterator, which could be n^2 and creates garbage
+ int i = 0, len = this.size;
+ T[] backingArray = this.contents;
+
+ for (;;) {
+ if (i >= len) {
+ return false;
+ }
+ if (!filter.test(backingArray[i])) {
+ ++i;
+ continue;
+ }
+ break;
+ }
+
+ // we only want to write back to backingArray if we really need to
+
+ int lastIndex = i; // this is where new elements are shifted to
+
+ for (; i < len; ++i) {
+ T curr = backingArray[i];
+ if (!filter.test(curr)) { // if test throws we're screwed
+ backingArray[lastIndex++] = curr;
+ }
+ }
+
+ // cleanup end
+ Arrays.fill(backingArray, lastIndex, len, null);
+ this.size = lastIndex;
+ return true;
+ }
+ // Paper end - optimise removeIf
public static <T extends Comparable<T>> SortedArraySet<T> create() {
return create(10);
@@ -110,6 +145,31 @@ public class SortedArraySet<T> extends AbstractSet<T> {
}
}
+ // Paper start - rewrite chunk system
+ public T replace(T object) {
+ int i = this.findIndex(object);
+ if (i >= 0) {
+ T old = this.contents[i];
+ this.contents[i] = object;
+ return old;
+ } else {
+ this.addInternal(object, getInsertionPosition(i));
+ return object;
+ }
+ }
+
+ public T removeAndGet(T object) {
+ int i = this.findIndex(object);
+ if (i >= 0) {
+ final T ret = this.contents[i];
+ this.removeInternal(i);
+ return ret;
+ } else {
+ return null;
+ }
+ }
+ // Paper end - rewrite chunk system
+
@Override
public boolean remove(Object object) {
int i = this.findIndex((T)object);
diff --git a/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java b/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java
index 821052e93ee753db6aaf499bbf39dc30598fe72f..2955c1ee153c410ea45fe367bac8597621c9bbd0 100644
--- a/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java
+++ b/src/main/java/net/minecraft/util/worldupdate/WorldUpgrader.java
@@ -182,7 +182,11 @@ public class WorldUpgrader {
}
WorldUpgrader.LOGGER.error("Error upgrading chunk {}", chunkcoordintpair, throwable);
+ // Paper start
+ } catch (IOException e) {
+ WorldUpgrader.LOGGER.error("Error upgrading chunk {}", chunkcoordintpair, e);
}
+ // Paper end
if (flag1) {
++this.converted;
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 1a44c98b69398ba5dcb4115f0e8fdcf3f62fd920..1a2ee5824c6af6b548e7006d583b73f4eba0f64a 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -319,6 +319,58 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
}
// Paper end
+ // Paper start
+ /**
+ * Overriding this field will cause memory leaks.
+ */
+ private final boolean hardCollides;
+
+ private static final java.util.Map<Class<? extends Entity>, Boolean> cachedOverrides = java.util.Collections.synchronizedMap(new java.util.WeakHashMap<>());
+ {
+ /* // Goodbye, broken on reobf...
+ Boolean hardCollides = cachedOverrides.get(this.getClass());
+ if (hardCollides == null) {
+ try {
+ java.lang.reflect.Method getHardCollisionBoxEntityMethod = Entity.class.getMethod("canCollideWith", Entity.class);
+ java.lang.reflect.Method hasHardCollisionBoxMethod = Entity.class.getMethod("canBeCollidedWith");
+ if (!this.getClass().getMethod(hasHardCollisionBoxMethod.getName(), hasHardCollisionBoxMethod.getParameterTypes()).equals(hasHardCollisionBoxMethod)
+ || !this.getClass().getMethod(getHardCollisionBoxEntityMethod.getName(), getHardCollisionBoxEntityMethod.getParameterTypes()).equals(getHardCollisionBoxEntityMethod)) {
+ hardCollides = Boolean.TRUE;
+ } else {
+ hardCollides = Boolean.FALSE;
+ }
+ cachedOverrides.put(this.getClass(), hardCollides);
+ }
+ catch (ThreadDeath thr) { throw thr; }
+ catch (Throwable thr) {
+ // shouldn't happen, just explode
+ throw new RuntimeException(thr);
+ }
+ } */
+ this.hardCollides = this instanceof Boat
+ || this instanceof net.minecraft.world.entity.monster.Shulker
+ || this instanceof net.minecraft.world.entity.vehicle.AbstractMinecart
+ || this.shouldHardCollide();
+ }
+
+ // plugins can override
+ protected boolean shouldHardCollide() {
+ return false;
+ }
+
+ public final boolean hardCollides() {
+ return this.hardCollides;
+ }
+
+ public net.minecraft.server.level.ChunkHolder.FullChunkStatus chunkStatus;
+
+ public int sectionX = Integer.MIN_VALUE;
+ public int sectionY = Integer.MIN_VALUE;
+ public int sectionZ = Integer.MIN_VALUE;
+
+ public boolean updatingSectionStatus = false;
+ // Paper end
+
public Entity(EntityType<?> type, Level world) {
this.id = Entity.ENTITY_COUNTER.incrementAndGet();
this.passengers = ImmutableList.of();
@@ -2106,11 +2158,11 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
return InteractionResult.PASS;
}
- public boolean canCollideWith(Entity other) {
+ public boolean canCollideWith(Entity other) { // Paper - diff on change, hard colliding entities override this - TODO CHECK ON UPDATE - AbstractMinecart/Boat override
return other.canBeCollidedWith() && !this.isPassengerOfSameVehicle(other);
}
- public boolean canBeCollidedWith() {
+ public boolean canBeCollidedWith() { // Paper - diff on change, hard colliding entities override this TODO CHECK ON UPDATE - Boat/Shulker override
return false;
}
@@ -3345,6 +3397,16 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
};
}
+ // Paper start - rewrite chunk system
+ public boolean hasAnyPlayerPassengers() {
+ // copied from below
+ if (this.passengers.isEmpty()) { return false; }
+ return this.getIndirectPassengersStream().anyMatch((entity) -> {
+ return entity instanceof Player;
+ });
+ }
+ // Paper end - rewrite chunk system
+
public boolean hasExactlyOnePlayerPassenger() {
return this.getIndirectPassengersStream().filter((entity) -> {
return entity instanceof Player;
@@ -3647,6 +3709,12 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
}
public final void setPosRaw(double x, double y, double z) {
+ // Paper start - rewrite chunk system
+ if (this.updatingSectionStatus) {
+ LOGGER.error("Refusing to update position for entity " + this + " to position " + new Vec3(x, y, z) + " since it is processing a section status update", new Throwable());
+ return;
+ }
+ // Paper end - rewrite chunk system
if (this.position.x != x || this.position.y != y || this.position.z != z) {
this.position = new Vec3(x, y, z);
int i = Mth.floor(x);
@@ -3742,6 +3810,13 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
@Override
public final void setRemoved(Entity.RemovalReason reason) {
+ // Paper start - rewrite chunk system
+ io.papermc.paper.util.TickThread.ensureTickThread(this, "Cannot remove entity off-main");
+ if (this.updatingSectionStatus) {
+ LOGGER.warn("Entity " + this + " is currently prevented from being added/removed to world since it is processing section status updates", new Throwable());
+ return;
+ }
+ // Paper end - rewrite chunk system
if (this.removalReason == null) {
this.removalReason = reason;
}
@@ -3750,7 +3825,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
this.stopRiding();
}
- this.getPassengers().forEach(Entity::stopRiding);
+ if (reason != RemovalReason.UNLOADED_TO_CHUNK) this.getPassengers().forEach(Entity::stopRiding); // Paper - chunk system - don't adjust passenger state when unloading, it's just not safe (and messes with our logic in entity chunk unload)
this.levelCallback.onRemove(reason);
}
@@ -3765,7 +3840,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
@Override
public boolean shouldBeSaved() {
- return this.removalReason != null && !this.removalReason.shouldSave() ? false : (this.isPassenger() ? false : !this.isVehicle() || !this.hasExactlyOnePlayerPassenger());
+ return this.removalReason != null && !this.removalReason.shouldSave() ? false : (this.isPassenger() ? false : !this.isVehicle() || !this.hasAnyPlayerPassengers()); // Paper - rewrite chunk system - it should check if the entity has ANY player passengers
}
@Override
diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java
index db4fa7355b1f834d0f8a0710c1c583dded184613..8938e04ffab2d31e64b80879d21d9f1eb90c20bb 100644
--- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java
+++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java
@@ -38,12 +38,28 @@ import net.minecraft.world.level.chunk.storage.SectionStorage;
public class PoiManager extends SectionStorage<PoiSection> {
public static final int MAX_VILLAGE_DISTANCE = 6;
public static final int VILLAGE_SECTION_SIZE = 1;
- private final PoiManager.DistanceTracker distanceTracker;
- private final LongSet loadedChunks = new LongOpenHashSet();
+ // Paper start - rewrite chunk system
+ // the vanilla tracker needs to be replaced because it does not support level removes
+ public final net.minecraft.server.level.ServerLevel world;
+ private final io.papermc.paper.util.misc.Delayed26WayDistancePropagator3D villageDistanceTracker = new io.papermc.paper.util.misc.Delayed26WayDistancePropagator3D();
+ static final int POI_DATA_SOURCE = 7;
+ public static int convertBetweenLevels(final int level) {
+ return POI_DATA_SOURCE - level;
+ }
+
+ protected void updateDistanceTracking(long section) {
+ if (this.isVillageCenter(section)) {
+ this.villageDistanceTracker.setSource(section, POI_DATA_SOURCE);
+ } else {
+ this.villageDistanceTracker.removeSource(section);
+ }
+ }
+ // Paper end - rewrite chunk system
+
public PoiManager(Path path, DataFixer dataFixer, boolean dsync, RegistryAccess registryManager, LevelHeightAccessor world) {
super(path, PoiSection::codec, PoiSection::new, dataFixer, DataFixTypes.POI_CHUNK, dsync, registryManager, world);
- this.distanceTracker = new PoiManager.DistanceTracker();
+ this.world = (net.minecraft.server.level.ServerLevel)world; // Paper - rewrite chunk system
}
public void add(BlockPos pos, Holder<PoiType> type) {
@@ -180,8 +196,8 @@ public class PoiManager extends SectionStorage<PoiSection> {
}
public int sectionsToVillage(SectionPos pos) {
- this.distanceTracker.runAllUpdates();
- return this.distanceTracker.getLevel(pos.asLong());
+ this.villageDistanceTracker.propagateUpdates(); // Paper - replace distance tracking util
+ return convertBetweenLevels(this.villageDistanceTracker.getLevel(io.papermc.paper.util.CoordinateUtils.getChunkSectionKey(pos))); // Paper - replace distance tracking util
}
boolean isVillageCenter(long pos) {
@@ -195,21 +211,106 @@ public class PoiManager extends SectionStorage<PoiSection> {
@Override
public void tick(BooleanSupplier shouldKeepTicking) {
- super.tick(shouldKeepTicking);
- this.distanceTracker.runAllUpdates();
+ this.villageDistanceTracker.propagateUpdates(); // Paper - rewrite chunk system
}
@Override
- protected void setDirty(long pos) {
- super.setDirty(pos);
- this.distanceTracker.update(pos, this.distanceTracker.getLevelFromSource(pos), false);
+ public void setDirty(long pos) {
+ // Paper start - rewrite chunk system
+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos);
+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos);
+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager;
+ io.papermc.paper.chunk.system.poi.PoiChunk chunk = manager.getPoiChunkIfLoaded(chunkX, chunkZ, false);
+ if (chunk != null) {
+ chunk.setDirty(true);
+ }
+ this.updateDistanceTracking(pos);
+ // Paper end - rewrite chunk system
}
@Override
protected void onSectionLoad(long pos) {
- this.distanceTracker.update(pos, this.distanceTracker.getLevelFromSource(pos), false);
+ this.updateDistanceTracking(pos); // Paper - move to new distance tracking util
}
+ @Override
+ public Optional<PoiSection> get(long pos) {
+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos);
+ int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos);
+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos);
+
+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main");
+
+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager;
+ io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true);
+
+ return ret == null ? Optional.empty() : ret.getSectionForVanilla(chunkY);
+ }
+
+ @Override
+ public Optional<PoiSection> getOrLoad(long pos) {
+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos);
+ int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos);
+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos);
+
+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main");
+
+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager;
+
+ if (chunkY >= io.papermc.paper.util.WorldUtil.getMinSection(this.world) &&
+ chunkY <= io.papermc.paper.util.WorldUtil.getMaxSection(this.world)) {
+ io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true);
+ if (ret != null) {
+ return ret.getSectionForVanilla(chunkY);
+ } else {
+ return manager.loadPoiChunk(chunkX, chunkZ).getSectionForVanilla(chunkY);
+ }
+ }
+ // retain vanilla behavior: do not load section if out of bounds!
+ return Optional.empty();
+ }
+
+ @Override
+ protected PoiSection getOrCreate(long pos) {
+ int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos);
+ int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos);
+ int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos);
+
+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main");
+
+ io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager;
+
+ io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true);
+ if (ret != null) {
+ return ret.getOrCreateSection(chunkY);
+ } else {
+ return manager.loadPoiChunk(chunkX, chunkZ).getOrCreateSection(chunkY);
+ }
+ }
+
+ public void onUnload(long coordinate) { // Paper - rewrite chunk system
+ int chunkX = net.minecraft.server.MCUtil.getCoordinateX(coordinate);
+ int chunkZ = net.minecraft.server.MCUtil.getCoordinateZ(coordinate);
+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Unloading poi chunk off-main");
+ for (int section = this.levelHeightAccessor.getMinSection(); section < this.levelHeightAccessor.getMaxSection(); ++section) {
+ long sectionPos = SectionPos.asLong(chunkX, section, chunkZ);
+ this.updateDistanceTracking(sectionPos);
+ }
+ }
+
+ public void loadInPoiChunk(io.papermc.paper.chunk.system.poi.PoiChunk poiChunk) {
+ int chunkX = poiChunk.chunkX;
+ int chunkZ = poiChunk.chunkZ;
+ io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Loading poi chunk off-main");
+ for (int sectionY = this.levelHeightAccessor.getMinSection(); sectionY < this.levelHeightAccessor.getMaxSection(); ++sectionY) {
+ PoiSection section = poiChunk.getSection(sectionY);
+ if (section != null && !section.isEmpty()) {
+ this.onSectionLoad(SectionPos.asLong(chunkX, sectionY, chunkZ));
+ }
+ }
+ }
+ // Paper end - rewrite chunk system
+
public void checkConsistencyWithBlocks(ChunkPos chunkPos, LevelChunkSection chunkSection) {
SectionPos sectionPos = SectionPos.of(chunkPos, SectionPos.blockToSectionCoord(chunkSection.bottomBlockY()));
Util.ifElse(this.getOrLoad(sectionPos.asLong()), (poiSet) -> {
@@ -249,7 +350,7 @@ public class PoiManager extends SectionStorage<PoiSection> {
}).map((pair) -> {
return pair.getFirst().chunk();
}).filter((chunkPos) -> {
- return this.loadedChunks.add(chunkPos.toLong());
+ return true; // Paper - rewrite chunk system
}).forEach((chunkPos) -> {
world.getChunk(chunkPos.x, chunkPos.z, ChunkStatus.EMPTY);
});
@@ -265,7 +366,7 @@ public class PoiManager extends SectionStorage<PoiSection> {
@Override
protected int getLevelFromSource(long id) {
- return PoiManager.this.isVillageCenter(id) ? 0 : 7;
+ return PoiManager.this.isVillageCenter(id) ? 0 : 7; // Paper - rewrite chunk system - diff on change, this specifies the source level to use for distance tracking
}
@Override
@@ -288,6 +389,35 @@ public class PoiManager extends SectionStorage<PoiSection> {
}
}
+ // Paper start - Asynchronous chunk io
+ @javax.annotation.Nullable
+ @Override
+ public net.minecraft.nbt.CompoundTag read(ChunkPos chunkcoordintpair) throws java.io.IOException {
+ // Paper start - rewrite chunk system
+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) {
+ return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData(
+ this.world, chunkcoordintpair.x, chunkcoordintpair.z, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA,
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread()
+ );
+ }
+ // Paper end - rewrite chunk system
+ return super.read(chunkcoordintpair);
+ }
+
+ @Override
+ public void write(ChunkPos chunkcoordintpair, net.minecraft.nbt.CompoundTag nbttagcompound) throws java.io.IOException {
+ // Paper start - rewrite chunk system
+ if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) {
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave(
+ this.world, chunkcoordintpair.x, chunkcoordintpair.z, nbttagcompound,
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA);
+ return;
+ }
+ // Paper end - rewrite chunk system
+ super.write(chunkcoordintpair, nbttagcompound);
+ }
+ // Paper end
+
public static enum Occupancy {
HAS_SPACE(PoiRecord::hasSpace),
IS_OCCUPIED(PoiRecord::isOccupied),
diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java
index bb2be6eea7a0cff4cc70bd43738b1ce213e43558..d0ce7b14d29459e276961c38cfc5b5da1cd15634 100644
--- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java
+++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java
@@ -29,6 +29,7 @@ public class PoiSection {
private final Map<Holder<PoiType>, Set<PoiRecord>> byType = Maps.newHashMap();
private final Runnable setDirty;
private boolean isValid;
+ public final Optional<PoiSection> noAllocateOptional = Optional.of(this); // Paper - rewrite chunk system
public static Codec<PoiSection> codec(Runnable updateListener) {
return RecordCodecBuilder.<PoiSection>create((instance) -> { // Paper - decompile fix
@@ -46,6 +47,12 @@ public class PoiSection {
this(updateListener, true, ImmutableList.of());
}
+ // Paper start - isEmpty
+ public boolean isEmpty() {
+ return this.isValid && this.records.isEmpty() && this.byType.isEmpty();
+ }
+ // Paper end
+
private PoiSection(Runnable updateListener, boolean valid, List<PoiRecord> pois) {
this.setDirty = updateListener;
this.isValid = valid;
diff --git a/src/main/java/net/minecraft/world/level/EntityGetter.java b/src/main/java/net/minecraft/world/level/EntityGetter.java
index 7c5918f84d2b8f9c778258b7e7d745105effb082..f62e4e36dd26bde067e4787fd0da1440b15a57fa 100644
--- a/src/main/java/net/minecraft/world/level/EntityGetter.java
+++ b/src/main/java/net/minecraft/world/level/EntityGetter.java
@@ -18,6 +18,18 @@ import net.minecraft.world.phys.shapes.Shapes;
import net.minecraft.world.phys.shapes.VoxelShape;
public interface EntityGetter {
+
+ // Paper start
+ List<Entity> getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate);
+
+ void getEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into);
+
+ void getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into);
+
+ <T> void getEntitiesByClass(Class<? extends T> clazz, Entity except, final AABB box, List<? super T> into,
+ Predicate<? super T> predicate);
+ // Paper end
+
List<Entity> getEntities(@Nullable Entity except, AABB box, Predicate<? super Entity> predicate);
<T extends Entity> List<T> getEntities(EntityTypeTest<Entity, T> filter, AABB box, Predicate<? super T> predicate);
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 39d64f3aeb998df5452699e098148d86fdd48c98..c12e2ecaea13597f56254e3ab7fd83bff129ddd3 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -450,6 +450,11 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
if ((i & 2) != 0 && (!this.isClientSide || (i & 4) == 0) && (this.isClientSide || chunk == null || (chunk.getFullStatus() != null && chunk.getFullStatus().isOrAfter(ChunkHolder.FullChunkStatus.TICKING)))) { // allow chunk to be null here as chunk.isReady() is false when we send our notification during block placement
this.sendBlockUpdated(blockposition, iblockdata1, iblockdata, i);
+ // Paper start - per player view distance - allow block updates for non-ticking chunks in player view distance
+ // if copied from above
+ } else if ((i & 2) != 0 && (!this.isClientSide || (i & 4) == 0) && (this.isClientSide || chunk == null || ((ServerLevel)this).getChunkSource().chunkMap.playerChunkManager.broadcastMap.getObjectsInRange(MCUtil.getCoordinateKey(blockposition)) != null)) { // Paper - replace old player chunk management
+ ((ServerLevel)this).getChunkSource().blockChanged(blockposition);
+ // Paper end - per player view distance
}
if ((i & 1) != 0) {
@@ -748,7 +753,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
return this.capturedTileEntities.get(blockposition);
}
// CraftBukkit end
- return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && Thread.currentThread() != this.thread ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE));
+ return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && !io.papermc.paper.util.TickThread.isTickThread() ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE)); // Paper - rewrite chunk system
}
public void setBlockEntity(BlockEntity blockEntity) {
@@ -839,26 +844,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
public List<Entity> getEntities(@Nullable Entity except, AABB box, Predicate<? super Entity> predicate) {
this.getProfiler().incrementCounter("getEntities");
List<Entity> list = Lists.newArrayList();
-
- this.getEntities().get(box, (entity1) -> {
- if (entity1 != except && predicate.test(entity1)) {
- list.add(entity1);
- }
-
- if (entity1 instanceof EnderDragon) {
- EnderDragonPart[] aentitycomplexpart = ((EnderDragon) entity1).getSubEntities();
- int i = aentitycomplexpart.length;
-
- for (int j = 0; j < i; ++j) {
- EnderDragonPart entitycomplexpart = aentitycomplexpart[j];
-
- if (entity1 != except && predicate.test(entitycomplexpart)) {
- list.add(entitycomplexpart);
- }
- }
- }
-
- });
+ ((ServerLevel)this).getEntityLookup().getEntities(except, box, list, predicate); // Paper - optimise this call
return list;
}
@@ -867,27 +853,22 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
this.getProfiler().incrementCounter("getEntities");
List<T> list = Lists.newArrayList();
- this.getEntities().get(filter, box, (entity) -> {
- if (predicate.test(entity)) {
- list.add(entity);
- }
-
- if (entity instanceof EnderDragon) {
- EnderDragon entityenderdragon = (EnderDragon) entity;
- EnderDragonPart[] aentitycomplexpart = entityenderdragon.getSubEntities();
- int i = aentitycomplexpart.length;
-
- for (int j = 0; j < i; ++j) {
- EnderDragonPart entitycomplexpart = aentitycomplexpart[j];
- T t0 = filter.tryCast(entitycomplexpart); // CraftBukkit - decompile error
-
- if (t0 != null && predicate.test(t0)) {
- list.add(t0);
- }
- }
+ // Paper start - optimise this call
+ if (filter instanceof net.minecraft.world.entity.EntityType) {
+ ((ServerLevel)this).getEntityLookup().getEntities((net.minecraft.world.entity.EntityType)filter, box, list, predicate);
+ } else {
+ Predicate<? super T> test = (obj) -> {
+ return filter.tryCast(obj) != null;
+ };
+ predicate = predicate == null ? test : test.and((Predicate)predicate);
+ Class base;
+ if (filter == null || (base = filter.getBaseClass()) == null || base == Entity.class) {
+ ((ServerLevel)this).getEntityLookup().getEntities((Entity) null, box, (List)list, (Predicate)predicate);
+ } else {
+ ((ServerLevel)this).getEntityLookup().getEntities(base, null, box, (List)list, (Predicate)predicate); // Paper - optimise this call
}
-
- });
+ }
+ // Paper end - optimise this call
return list;
}
@@ -1214,4 +1195,46 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
public long nextSubTickCount() {
return (long) (this.subTickCount++);
}
+
+ // Paper start
+ //protected final io.papermc.paper.world.EntitySliceManager entitySliceManager; // Paper - rewrite chunk system
+
+ public org.bukkit.entity.Entity[] getChunkEntities(int chunkX, int chunkZ) {
+ io.papermc.paper.world.ChunkEntitySlices slices = ((ServerLevel)this).getEntityLookup().getChunk(chunkX, chunkZ);
+ if (slices == null) {
+ return new org.bukkit.entity.Entity[0];
+ }
+ return slices.getChunkEntities();
+ }
+
+ @Override
+ public List<Entity> getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate) {
+ List<Entity> ret = new java.util.ArrayList<>();
+ ((ServerLevel)this).getEntityLookup().getHardCollidingEntities(except, box, ret, predicate);
+ return ret;
+ }
+
+ @Override
+ public void getEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into) {
+ ((ServerLevel)this).getEntityLookup().getEntities(except, box, into, predicate);
+ }
+
+ @Override
+ public void getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into) {
+ ((ServerLevel)this).getEntityLookup().getHardCollidingEntities(except, box, into, predicate);
+ }
+
+ @Override
+ public <T> void getEntitiesByClass(Class<? extends T> clazz, Entity except, final AABB box, List<? super T> into,
+ Predicate<? super T> predicate) {
+ ((ServerLevel)this).getEntityLookup().getEntities((Class)clazz, except, box, (List)into, (Predicate)predicate);
+ }
+
+ @Override
+ public <T extends Entity> List<T> getEntitiesOfClass(Class<T> entityClass, AABB box, Predicate<? super T> predicate) {
+ List<T> ret = new java.util.ArrayList<>();
+ ((ServerLevel)this).getEntityLookup().getEntities(entityClass, null, box, ret, predicate);
+ return ret;
+ }
+ // Paper end
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
index 2b543472302faf4b6298efe9bc44c023051f4997..f284eefe5de6ad8b42f7d4185fc4c3b8b2cd5895 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
@@ -288,7 +288,7 @@ public abstract class ChunkGenerator {
return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("init_biomes", () -> {
chunk.fillBiomesFromNoise(this.biomeSource, noiseConfig.sampler());
return chunk;
- }), Util.backgroundExecutor());
+ }), executor); // Paper - run with supplied executor
}
public abstract void applyCarvers(WorldGenRegion chunkRegion, long seed, RandomState noiseConfig, BiomeManager biomeAccess, StructureManager structureAccessor, ChunkAccess chunk, GenerationStep.Carving carverStep);
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java b/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java
index e6240f891e396d91e31b02fdf3084be77e9d6697..00cb9dafc711607f28529ea9afbcdb492b1b2595 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java
@@ -29,6 +29,30 @@ import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemp
public class ChunkStatus {
+ // Paper start - rewrite chunk system
+ public boolean isParallelCapable; // Paper
+ public int writeRadius = -1;
+ public int loadRange = 0;
+
+ protected static final java.util.List<ChunkStatus> statuses = new java.util.ArrayList<>();
+
+ private ChunkStatus nextStatus;
+
+ public final ChunkStatus getNextStatus() {
+ return this.nextStatus;
+ }
+
+ public final boolean isEmptyLoadStatus() {
+ return this.loadingTask == PASSTHROUGH_LOAD_TASK;
+ }
+
+ public final boolean isEmptyGenStatus() {
+ return this == ChunkStatus.EMPTY || this == ChunkStatus.HEIGHTMAPS || this == ChunkStatus.LIQUID_CARVERS;
+ }
+
+ public final java.util.concurrent.atomic.AtomicBoolean warnedAboutNoImmediateComplete = new java.util.concurrent.atomic.AtomicBoolean();
+ // Paper end - rewrite chunk system
+
public static final int MAX_STRUCTURE_DISTANCE = 8;
private static final EnumSet<Heightmap.Types> PRE_FEATURES = EnumSet.of(Heightmap.Types.OCEAN_FLOOR_WG, Heightmap.Types.WORLD_SURFACE_WG);
public static final EnumSet<Heightmap.Types> POST_FEATURES = EnumSet.of(Heightmap.Types.OCEAN_FLOOR, Heightmap.Types.WORLD_SURFACE, Heightmap.Types.MOTION_BLOCKING, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES);
@@ -150,10 +174,8 @@ public class ChunkStatus {
protochunk.setStatus(chunkstatus);
}
- return lightenginethreaded.retainData(ichunkaccess).thenApply(Either::left);
- }, (chunkstatus, worldserver, structuretemplatemanager, lightenginethreaded, function, ichunkaccess) -> {
- return lightenginethreaded.retainData(ichunkaccess).thenApply(Either::left);
- });
+ return CompletableFuture.completedFuture(Either.left(ichunkaccess)); // Paper - rewrite chunk system
+ }); // Paper - rewrite chunk system
public static final ChunkStatus LIGHT = ChunkStatus.register("light", ChunkStatus.FEATURES, 1, ChunkStatus.POST_FEATURES, ChunkStatus.ChunkType.PROTOCHUNK, (chunkstatus, executor, worldserver, chunkgenerator, structuretemplatemanager, lightenginethreaded, function, list, ichunkaccess, flag) -> {
return ChunkStatus.lightChunk(chunkstatus, lightenginethreaded, ichunkaccess);
}, (chunkstatus, worldserver, structuretemplatemanager, lightenginethreaded, function, ichunkaccess) -> {
@@ -255,6 +277,13 @@ public class ChunkStatus {
this.chunkType = chunkType;
this.heightmapsAfter = heightMapTypes;
this.index = previous == null ? 0 : previous.getIndex() + 1;
+ // Paper start
+ this.nextStatus = this;
+ if (statuses.size() > 0) {
+ statuses.get(statuses.size() - 1).nextStatus = this;
+ }
+ statuses.add(this);
+ // Paper end
}
public int getIndex() {
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
index e75ec8f6aa597b5f3048d6269fba45eef057bc71..6a84e7524a246e234116a37349f30e01411e6787 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -183,6 +183,43 @@ public class LevelChunk extends ChunkAccess {
protected void onNeighbourChange(final long bitsetBefore, final long bitsetAfter) {
+ // Paper start - no-tick view distance
+ ServerChunkCache chunkProviderServer = ((ServerLevel)this.level).getChunkSource();
+ net.minecraft.server.level.ChunkMap chunkMap = chunkProviderServer.chunkMap;
+ // this code handles the addition of ticking tickets - the distance map handles the removal
+ if (!areNeighboursLoaded(bitsetBefore, 2) && areNeighboursLoaded(bitsetAfter, 2)) {
+ if (chunkMap.playerChunkManager.tickMap.getObjectsInRange(this.coordinateKey) != null) { // Paper - replace old player chunk loading system
+ // now we're ready for entity ticking
+ chunkProviderServer.mainThreadProcessor.execute(() -> {
+ // double check that this condition still holds.
+ if (LevelChunk.this.areNeighboursLoaded(2) && chunkMap.playerChunkManager.tickMap.getObjectsInRange(LevelChunk.this.coordinateKey) != null) { // Paper - replace old player chunk loading system
+ chunkMap.playerChunkManager.onChunkPlayerTickReady(this.chunkPos.x, this.chunkPos.z); // Paper - replace old player chunk
+ chunkProviderServer.addTicketAtLevel(net.minecraft.server.level.TicketType.PLAYER, LevelChunk.this.chunkPos, 31, LevelChunk.this.chunkPos); // 31 -> entity ticking, TODO check on update
+ }
+ });
+ }
+ }
+
+ // this code handles the chunk sending
+ if (!areNeighboursLoaded(bitsetBefore, 1) && areNeighboursLoaded(bitsetAfter, 1)) {
+ // Paper start - replace old player chunk loading system
+ if (chunkMap.playerChunkManager.isChunkNearPlayers(this.chunkPos.x, this.chunkPos.z)) {
+ // the post processing is expensive, so we don't want to run it unless we're actually near
+ // a player.
+ chunkProviderServer.mainThreadProcessor.execute(() -> {
+ if (!LevelChunk.this.areNeighboursLoaded(1)) {
+ return;
+ }
+ LevelChunk.this.postProcessGeneration();
+ if (!LevelChunk.this.areNeighboursLoaded(1)) {
+ return;
+ }
+ chunkMap.playerChunkManager.onChunkSendReady(this.chunkPos.x, this.chunkPos.z);
+ });
+ }
+ // Paper end - replace old player chunk loading system
+ }
+ // Paper end - no-tick view distance
}
public final boolean isAnyNeighborsLoaded() {
@@ -660,9 +697,26 @@ public class LevelChunk extends ChunkAccess {
}
- // CraftBukkit start
- public void loadCallback() {
- // Paper start - neighbour cache
+ // Paper start - new load callbacks
+ private io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder;
+ public io.papermc.paper.chunk.system.scheduling.NewChunkHolder getChunkHolder() {
+ return this.chunkHolder;
+ }
+
+ public void setChunkHolder(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ if (chunkHolder == null) {
+ throw new NullPointerException("Chunkholder cannot be null");
+ }
+ if (this.chunkHolder != null) {
+ throw new IllegalStateException("Already have chunkholder: " + this.chunkHolder + ", cannot replace with " + chunkHolder);
+ }
+ this.chunkHolder = chunkHolder;
+ this.playerChunk = chunkHolder.vanillaChunkHolder;
+ }
+
+ /* Note: We skip the light neighbour chunk loading done for the vanilla full chunk */
+ /* Starlight does not need these chunks for lighting purposes because of edge checks */
+ public void pushChunkIntoLoadedMap() {
int chunkX = this.chunkPos.x;
int chunkZ = this.chunkPos.z;
ServerChunkCache chunkProvider = this.level.getChunkSource();
@@ -677,10 +731,56 @@ public class LevelChunk extends ChunkAccess {
}
}
this.setNeighbourLoaded(0, 0, this);
+ this.level.getChunkSource().addLoadedChunk(this);
+ }
+
+ public void onChunkLoad(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ // figure out how this should interface with:
+ // the entity chunk load event // -> moved to the FULL status
+ // the chunk load event // -> stays here
+ // any entity add to world events // -> in FULL status
+ this.loadCallback();
+ net.minecraft.server.ChunkSystem.onChunkBorder(this, chunkHolder.vanillaChunkHolder);
+ }
+
+ public void onChunkUnload(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ // figure out how this should interface with:
+ // the entity chunk load event // -> moved to chunk unload to disk (not written yet)
+ // the chunk load event // -> stays here
+ // any entity add to world events // -> goes into the unload logic, it will completely explode
+ // etc later
+ this.unloadCallback();
+ net.minecraft.server.ChunkSystem.onChunkNotBorder(this, chunkHolder.vanillaChunkHolder);
+ }
+
+ public void onChunkTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ this.postProcessGeneration();
+ this.level.startTickingChunk(this);
+ net.minecraft.server.ChunkSystem.onChunkTicking(this, chunkHolder.vanillaChunkHolder);
+ }
+
+ public void onChunkNotTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ net.minecraft.server.ChunkSystem.onChunkNotTicking(this, chunkHolder.vanillaChunkHolder);
+ }
+
+ public void onChunkEntityTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ net.minecraft.server.ChunkSystem.onChunkEntityTicking(this, chunkHolder.vanillaChunkHolder);
+ }
+
+ public void onChunkNotEntityTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) {
+ net.minecraft.server.ChunkSystem.onChunkNotEntityTicking(this, chunkHolder.vanillaChunkHolder);
+ }
+ // Paper end - new load callbacks
+
+ // CraftBukkit start
+ public void loadCallback() {
+ if (this.loadedTicketLevel) { LOGGER.error("Double calling chunk load!", new Throwable()); } // Paper
+ // Paper - rewrite chunk system - move into separate callback
this.loadedTicketLevel = true;
- // Paper end - neighbour cache
+ // Paper - rewrite chunk system - move into separate callback
org.bukkit.Server server = this.level.getCraftServer();
- this.level.getChunkSource().addLoadedChunk(this); // Paper
+ // Paper - rewrite chunk system - move into separate callback
+ ((ServerLevel)this.level).getChunkSource().chunkMap.playerChunkManager.onChunkLoad(this.chunkPos.x, this.chunkPos.z); // Paper - rewrite player chunk management
if (server != null) {
/*
* If it's a new world, the first few chunks are generated inside
@@ -688,6 +788,7 @@ public class LevelChunk extends ChunkAccess {
* no way of creating a CraftWorld/CraftServer at that point.
*/
server.getPluginManager().callEvent(new org.bukkit.event.world.ChunkLoadEvent(this.bukkitChunk, this.needsDecoration));
+ this.chunkHolder.getEntityChunk().callEntitiesLoadEvent(); // Paper - rewrite chunk system
if (this.needsDecoration) {
try (co.aikar.timings.Timing ignored = this.level.timings.chunkLoadPopulate.startTiming()) { // Paper
@@ -716,7 +817,9 @@ public class LevelChunk extends ChunkAccess {
}
public void unloadCallback() {
+ if (!this.loadedTicketLevel) { LOGGER.error("Double calling chunk unload!", new Throwable()); } // Paper
org.bukkit.Server server = this.level.getCraftServer();
+ this.chunkHolder.getEntityChunk().callEntitiesUnloadEvent(); // Paper - rewrite chunk system
org.bukkit.event.world.ChunkUnloadEvent unloadEvent = new org.bukkit.event.world.ChunkUnloadEvent(this.bukkitChunk, this.isUnsaved());
server.getPluginManager().callEvent(unloadEvent);
// note: saving can be prevented, but not forced if no saving is actually required
@@ -804,7 +907,10 @@ public class LevelChunk extends ChunkAccess {
});
}
+ public boolean isPostProcessingDone; // Paper - replace chunk loader system
+
public void postProcessGeneration() {
+ try { // Paper - replace chunk loader system
ChunkPos chunkcoordintpair = this.getPos();
for (int i = 0; i < this.postProcessing.length; ++i) {
@@ -842,6 +948,11 @@ public class LevelChunk extends ChunkAccess {
this.pendingBlockEntities.clear();
this.upgradeData.upgrade(this);
+ } finally { // Paper start - replace chunk loader system
+ this.isPostProcessingDone = true;
+ this.level.getChunkSource().chunkMap.playerChunkManager.onChunkPostProcessing(this.chunkPos.x, this.chunkPos.z);
+ }
+ // Paper end - replace chunk loader system
}
@Nullable
@@ -891,7 +1002,7 @@ public class LevelChunk extends ChunkAccess {
}
public ChunkHolder.FullChunkStatus getFullStatus() {
- return this.fullStatus == null ? ChunkHolder.FullChunkStatus.BORDER : (ChunkHolder.FullChunkStatus) this.fullStatus.get();
+ return this.chunkHolder == null ? ChunkHolder.FullChunkStatus.INACCESSIBLE : this.chunkHolder.getChunkStatus(); // Paper - rewrite chunk system
}
public void setFullStatus(Supplier<ChunkHolder.FullChunkStatus> levelTypeProvider) {
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
index 2dead743775df9b261bdcdca30df9b672c6acc8b..e59910540458ca912efea64d9f7cd212d63d110a 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
@@ -92,7 +92,31 @@ public class ChunkSerializer {
public ChunkSerializer() {}
+ // Paper start
+ public static final class InProgressChunkHolder {
+
+ public final ProtoChunk protoChunk;
+ public final java.util.ArrayDeque<Runnable> tasks;
+
+ public CompoundTag poiData;
+
+ public InProgressChunkHolder(final ProtoChunk protoChunk, final java.util.ArrayDeque<Runnable> tasks) {
+ this.protoChunk = protoChunk;
+ this.tasks = tasks;
+ }
+ }
+ // Paper end
+
public static ProtoChunk read(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt) {
+ // Paper start - add variant for async calls
+ InProgressChunkHolder holder = loadChunk(world, poiStorage, chunkPos, nbt, true);
+ holder.tasks.forEach(Runnable::run);
+ return holder.protoChunk;
+ }
+
+ public static InProgressChunkHolder loadChunk(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt, boolean distinguish) {
+ java.util.ArrayDeque<Runnable> tasksToExecuteOnMain = new java.util.ArrayDeque<>();
+ // Paper end
ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos"));
if (!Objects.equals(chunkPos, chunkcoordintpair1)) {
@@ -156,7 +180,9 @@ public class ChunkSerializer {
LevelChunkSection chunksection = new LevelChunkSection(b0, datapaletteblock, (PalettedContainer) object); // CraftBukkit - read/write
achunksection[k] = chunksection;
+ tasksToExecuteOnMain.add(() -> { // Paper - delay this task since we're executing off-main
poiStorage.checkConsistencyWithBlocks(chunkPos, chunksection);
+ }); // Paper - delay this task since we're executing off-main
}
boolean flag3 = nbttagcompound1.contains("BlockLight", 7);
@@ -317,7 +343,7 @@ public class ChunkSerializer {
}
if (chunkstatus_type == ChunkStatus.ChunkType.LEVELCHUNK) {
- return new ImposterProtoChunk((LevelChunk) object1, false);
+ return new InProgressChunkHolder(new ImposterProtoChunk((LevelChunk) object1, false), tasksToExecuteOnMain); // Paper - Async chunk loading
} else {
ProtoChunk protochunk1 = (ProtoChunk) object1;
@@ -356,9 +382,41 @@ public class ChunkSerializer {
protochunk1.setCarvingMask(worldgenstage_features, new CarvingMask(nbttagcompound4.getLongArray(s1), ((ChunkAccess) object1).getMinBuildHeight()));
}
- return protochunk1;
+ return new InProgressChunkHolder(protochunk1, tasksToExecuteOnMain); // Paper - Async chunk loading
+ }
+ }
+
+ // Paper start - async chunk save for unload
+ public record AsyncSaveData(
+ Tag blockTickList, // non-null if we had to go to the server's tick list
+ Tag fluidTickList, // non-null if we had to go to the server's tick list
+ ListTag blockEntities,
+ long worldTime
+ ) {}
+
+ // must be called sync
+ public static AsyncSaveData getAsyncSaveData(ServerLevel world, ChunkAccess chunk) {
+ org.spigotmc.AsyncCatcher.catchOp("preparation of chunk data for async save");
+
+ final CompoundTag tickLists = new CompoundTag();
+ ChunkSerializer.saveTicks(world, tickLists, chunk.getTicksForSerialization());
+
+ ListTag blockEntitiesSerialized = new ListTag();
+ for (final BlockPos blockPos : chunk.getBlockEntitiesPos()) {
+ final CompoundTag blockEntityNbt = chunk.getBlockEntityNbtForSaving(blockPos);
+ if (blockEntityNbt != null) {
+ blockEntitiesSerialized.add(blockEntityNbt);
+ }
}
+
+ return new AsyncSaveData(
+ tickLists.get(BLOCK_TICKS_TAG),
+ tickLists.get(FLUID_TICKS_TAG),
+ blockEntitiesSerialized,
+ world.getGameTime()
+ );
}
+ // Paper end
private static void logErrors(ChunkPos chunkPos, int y, String message) {
ChunkSerializer.LOGGER.error("Recoverable errors when loading section [" + chunkPos.x + ", " + y + ", " + chunkPos.z + "]: " + message);
@@ -375,6 +433,11 @@ public class ChunkSerializer {
// CraftBukkit end
public static CompoundTag write(ServerLevel world, ChunkAccess chunk) {
+ // Paper start
+ return saveChunk(world, chunk, null);
+ }
+ public static CompoundTag saveChunk(ServerLevel world, ChunkAccess chunk, @org.checkerframework.checker.nullness.qual.Nullable AsyncSaveData asyncsavedata) {
+ // Paper end
// Paper start - rewrite light impl
final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world);
final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world);
@@ -388,7 +451,7 @@ public class ChunkSerializer {
nbttagcompound.putInt("xPos", chunkcoordintpair.x);
nbttagcompound.putInt("yPos", chunk.getMinSection());
nbttagcompound.putInt("zPos", chunkcoordintpair.z);
- nbttagcompound.putLong("LastUpdate", world.getGameTime());
+ nbttagcompound.putLong("LastUpdate", asyncsavedata != null ? asyncsavedata.worldTime : world.getGameTime()); // Paper - async chunk unloading
nbttagcompound.putLong("InhabitedTime", chunk.getInhabitedTime());
nbttagcompound.putString("Status", chunk.getStatus().getName());
BlendingData blendingdata = chunk.getBlendingData();
@@ -488,8 +551,17 @@ public class ChunkSerializer {
nbttagcompound.putBoolean("isLightOn", false); // Paper - set to false but still store, this allows us to detect --eraseCache (as eraseCache _removes_)
}
- ListTag nbttaglist1 = new ListTag();
- Iterator iterator = chunk.getBlockEntitiesPos().iterator();
+ // Paper start
+ ListTag nbttaglist1;
+ Iterator<BlockPos> iterator;
+ if (asyncsavedata != null) {
+ nbttaglist1 = asyncsavedata.blockEntities;
+ iterator = java.util.Collections.emptyIterator();
+ } else {
+ nbttaglist1 = new ListTag();
+ iterator = chunk.getBlockEntitiesPos().iterator();
+ }
+ // Paper end
CompoundTag nbttagcompound2;
@@ -526,7 +598,14 @@ public class ChunkSerializer {
nbttagcompound.put("CarvingMasks", nbttagcompound2);
}
+ // Paper start
+ if (asyncsavedata != null) {
+ nbttagcompound.put(BLOCK_TICKS_TAG, asyncsavedata.blockTickList);
+ nbttagcompound.put(FLUID_TICKS_TAG, asyncsavedata.fluidTickList);
+ } else {
ChunkSerializer.saveTicks(world, nbttagcompound, chunk.getTicksForSerialization());
+ }
+ // Paper end
nbttagcompound.put("PostProcessing", ChunkSerializer.packOffsets(chunk.getPostProcessing()));
CompoundTag nbttagcompound3 = new CompoundTag();
Iterator iterator1 = chunk.getHeightmaps().iterator();
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
index 9730ee10042e02741383c8153eb3b7b7103f80e0..f2539f2aab4086bc6772db9985ca9f75ff6a7c71 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
@@ -28,26 +28,33 @@ import net.minecraft.world.level.storage.DimensionDataStorage;
public class ChunkStorage implements AutoCloseable {
public static final int LAST_MONOLYTH_STRUCTURE_DATA_VERSION = 1493;
- private final IOWorker worker;
+ // Paper - nuke IO worker
protected final DataFixer fixerUpper;
@Nullable
private volatile LegacyStructureDataHandler legacyStructureHandler;
+ // Paper start - async chunk loading
+ private final Object persistentDataLock = new Object(); // Paper
+ public final RegionFileStorage regionFileCache;
+ // Paper end - async chunk loading
public ChunkStorage(Path directory, DataFixer dataFixer, boolean dsync) {
this.fixerUpper = dataFixer;
- this.worker = new IOWorker(directory, dsync, "chunk");
+ // Paper start - async chunk io
+ // remove IO worker
+ this.regionFileCache = new RegionFileStorage(directory, dsync); // Paper - nuke IOWorker
+ // Paper end - async chunk io
}
public boolean isOldChunkAround(ChunkPos chunkPos, int checkRadius) {
- return this.worker.isOldChunkAround(chunkPos, checkRadius);
+ return true; // Paper - (for now, old unoptimised behavior) TODO implement later? the chunk status that blender uses SHOULD already have this radius loaded, no need to go back for it...
}
// CraftBukkit start
private boolean check(ServerChunkCache cps, int x, int z) {
ChunkPos pos = new ChunkPos(x, z);
if (cps != null) {
- com.google.common.base.Preconditions.checkState(org.bukkit.Bukkit.isPrimaryThread(), "primary thread");
- if (cps.hasChunk(x, z)) {
+ //com.google.common.base.Preconditions.checkState(org.bukkit.Bukkit.isPrimaryThread(), "primary thread"); // Paper - this function is now MT-Safe
+ if (cps.getChunkAtIfCachedImmediately(x, z) != null) { // Paper - isLoaded is a ticket level check, not a chunk loaded check!
return true;
}
}
@@ -75,6 +82,7 @@ public class ChunkStorage implements AutoCloseable {
public CompoundTag upgradeChunkTag(ResourceKey<LevelStem> resourcekey, Supplier<DimensionDataStorage> supplier, CompoundTag nbttagcompound, Optional<ResourceKey<Codec<? extends ChunkGenerator>>> optional, ChunkPos pos, @Nullable LevelAccessor generatoraccess) {
// CraftBukkit end
+ nbttagcompound = nbttagcompound.copy(); // Paper - defensive copy, another thread might modify this
int i = ChunkStorage.getVersion(nbttagcompound);
// CraftBukkit start
@@ -92,9 +100,11 @@ public class ChunkStorage implements AutoCloseable {
if (i < 1493) {
ca.spottedleaf.dataconverter.minecraft.MCDataConverter.convertTag(ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry.CHUNK, nbttagcompound, i, 1493); // Paper - replace chunk converter
if (nbttagcompound.getCompound("Level").getBoolean("hasLegacyStructureData")) {
+ synchronized (this.persistentDataLock) { // Paper - Async chunk loading
LegacyStructureDataHandler persistentstructurelegacy = this.getLegacyStructureHandler(resourcekey, supplier);
nbttagcompound = persistentstructurelegacy.updateFromLegacy(nbttagcompound);
+ } // Paper - Async chunk loading
}
}
@@ -127,7 +137,7 @@ public class ChunkStorage implements AutoCloseable {
LegacyStructureDataHandler persistentstructurelegacy = this.legacyStructureHandler;
if (persistentstructurelegacy == null) {
- synchronized (this) {
+ synchronized (this.persistentDataLock) { // Paper - async chunk loading
persistentstructurelegacy = this.legacyStructureHandler;
if (persistentstructurelegacy == null) {
this.legacyStructureHandler = persistentstructurelegacy = LegacyStructureDataHandler.getLegacyStructureHandler(resourcekey, (DimensionDataStorage) supplier.get());
@@ -153,26 +163,49 @@ public class ChunkStorage implements AutoCloseable {
}
public CompletableFuture<Optional<CompoundTag>> read(ChunkPos chunkPos) {
- return this.worker.loadAsync(chunkPos);
+ // Paper start - async chunk io
+ try {
+ return CompletableFuture.completedFuture(Optional.ofNullable(this.readSync(chunkPos)));
+ } catch (Throwable thr) {
+ return CompletableFuture.failedFuture(thr);
+ }
+ }
+ @Nullable
+ public CompoundTag readSync(ChunkPos chunkPos) throws IOException {
+ return this.regionFileCache.read(chunkPos);
}
+ // Paper end - async chunk io
- public void write(ChunkPos chunkPos, CompoundTag nbt) {
- this.worker.store(chunkPos, nbt);
+ // Paper start - async chunk io
+ public void write(ChunkPos chunkPos, CompoundTag nbt) throws IOException {
+ this.regionFileCache.write(chunkPos, nbt);
+ // Paper end - Async chunk loading
if (this.legacyStructureHandler != null) {
+ synchronized (this.persistentDataLock) { // Paper - Async chunk loading
this.legacyStructureHandler.removeIndex(chunkPos.toLong());
+ } // Paper - Async chunk loading
}
}
public void flushWorker() {
- this.worker.synchronize(true).join();
+ io.papermc.paper.chunk.system.io.RegionFileIOThread.flush(); // Paper - rewrite chunk system
}
public void close() throws IOException {
- this.worker.close();
+ this.regionFileCache.close(); // Paper - nuke IO worker
}
public ChunkScanAccess chunkScanner() {
- return this.worker;
+ // Paper start - nuke IO worker
+ return ((chunkPos, streamTagVisitor) -> {
+ try {
+ this.regionFileCache.scanChunk(chunkPos, streamTagVisitor);
+ return java.util.concurrent.CompletableFuture.completedFuture(null);
+ } catch (IOException e) {
+ throw new RuntimeException(e);
+ }
+ });
+ // Paper end
}
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
index 0ede151943109e81f66875340261d77f67f63c95..0b92db95416b878f41b83b5c74d1c0a1031ff6af 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
@@ -31,43 +31,31 @@ public class EntityStorage implements EntityPersistentStorage<Entity> {
private static final String ENTITIES_TAG = "Entities";
private static final String POSITION_TAG = "Position";
public final ServerLevel level;
- private final IOWorker worker;
+ // Paper - rewrite chunk system
private final LongSet emptyChunks = new LongOpenHashSet();
- public final ProcessorMailbox<Runnable> entityDeserializerQueue;
+ // Paper - rewrite chunk system
protected final DataFixer fixerUpper;
public EntityStorage(ServerLevel world, Path path, DataFixer dataFixer, boolean dsync, Executor executor) {
this.level = world;
this.fixerUpper = dataFixer;
- this.entityDeserializerQueue = ProcessorMailbox.create(executor, "entity-deserializer");
- this.worker = new IOWorker(path, dsync, "entities");
+ // Paper - rewrite chunk system
}
@Override
public CompletableFuture<ChunkEntities<Entity>> loadEntities(ChunkPos pos) {
- return this.emptyChunks.contains(pos.toLong()) ? CompletableFuture.completedFuture(emptyChunk(pos)) : this.worker.loadAsync(pos).thenApplyAsync((nbt) -> {
- if (nbt.isEmpty()) {
- this.emptyChunks.add(pos.toLong());
- return emptyChunk(pos);
- } else {
- try {
- ChunkPos chunkPos2 = readChunkPos(nbt.get());
- if (!Objects.equals(pos, chunkPos2)) {
- LOGGER.error("Chunk file at {} is in the wrong location. (Expected {}, got {})", pos, pos, chunkPos2);
- }
- } catch (Exception var6) {
- LOGGER.warn("Failed to parse chunk {} position info", pos, var6);
- }
-
- CompoundTag compoundTag = this.upgradeChunkTag(nbt.get());
- ListTag listTag = compoundTag.getList("Entities", 10);
- List<Entity> list = EntityType.loadEntitiesRecursive(listTag, this.level).collect(ImmutableList.toImmutableList());
- return new ChunkEntities<>(pos, list);
- }
- }, this.entityDeserializerQueue::tell);
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system - copy out read logic into readEntities
+ }
+
+ // Paper start - rewrite chunk system
+ public static List<Entity> readEntities(ServerLevel level, CompoundTag compoundTag) {
+ ListTag listTag = compoundTag.getList("Entities", 10);
+ List<Entity> list = EntityType.loadEntitiesRecursive(listTag, level).collect(ImmutableList.toImmutableList());
+ return list;
}
+ // Paper end - rewrite chunk system
- private static ChunkPos readChunkPos(CompoundTag chunkNbt) {
+ public static ChunkPos readChunkPos(CompoundTag chunkNbt) { // Paper - public
int[] is = chunkNbt.getIntArray("Position");
return new ChunkPos(is[0], is[1]);
}
@@ -82,40 +70,68 @@ public class EntityStorage implements EntityPersistentStorage<Entity> {
@Override
public void storeEntities(ChunkEntities<Entity> dataList) {
+ // Paper start - rewrite chunk system
+ if (true) {
+ throw new UnsupportedOperationException();
+ }
+ // Paper end - rewrite chunk system
ChunkPos chunkPos = dataList.getPos();
if (dataList.isEmpty()) {
if (this.emptyChunks.add(chunkPos.toLong())) {
- this.worker.store(chunkPos, (CompoundTag)null);
+ // Paper - rewrite chunk system
}
} else {
- ListTag listTag = new ListTag();
- dataList.getEntities().forEach((entity) -> {
- CompoundTag compoundTag = new CompoundTag();
- if (entity.save(compoundTag)) {
- listTag.add(compoundTag);
- }
-
- });
- CompoundTag compoundTag = new CompoundTag();
- compoundTag.putInt("DataVersion", SharedConstants.getCurrentVersion().getWorldVersion());
- compoundTag.put("Entities", listTag);
- writeChunkPos(compoundTag, chunkPos);
- this.worker.store(chunkPos, compoundTag).exceptionally((ex) -> {
- LOGGER.error("Failed to store chunk {}", chunkPos, ex);
- return null;
- });
+ // Paper - move into saveEntityChunk0
this.emptyChunks.remove(chunkPos.toLong());
}
}
+ // Paper start - rewrite chunk system
+ public static void copyEntities(final CompoundTag from, final CompoundTag into) {
+ if (from == null) {
+ return;
+ }
+ final ListTag entitiesFrom = from.getList("Entities", net.minecraft.nbt.Tag.TAG_COMPOUND);
+ if (entitiesFrom == null || entitiesFrom.isEmpty()) {
+ return;
+ }
+
+ final ListTag entitiesInto = into.getList("Entities", net.minecraft.nbt.Tag.TAG_COMPOUND);
+ into.put("Entities", entitiesInto); // this is in case into doesn't have any entities
+ entitiesInto.addAll(0, entitiesFrom.copy()); // need to copy, this is coming from the save thread
+ }
+
+ public static CompoundTag saveEntityChunk(List<Entity> entities, ChunkPos chunkPos, ServerLevel level) {
+ return saveEntityChunk0(entities, chunkPos, level, false);
+ }
+ private static CompoundTag saveEntityChunk0(List<Entity> entities, ChunkPos chunkPos, ServerLevel level, boolean force) {
+ if (!force && entities.isEmpty()) {
+ return null;
+ }
+ ListTag listTag = new ListTag();
+ entities.forEach((entity) -> { // diff here: use entities parameter
+ CompoundTag compoundTag = new CompoundTag();
+ if (entity.save(compoundTag)) {
+ listTag.add(compoundTag);
+ }
+
+ });
+ CompoundTag compoundTag = new CompoundTag();
+ compoundTag.putInt("DataVersion", SharedConstants.getCurrentVersion().getWorldVersion());
+ compoundTag.put("Entities", listTag);
+ writeChunkPos(compoundTag, chunkPos);
+
+ return !force && listTag.isEmpty() ? null : compoundTag;
+ }
+ // Paper end - rewrite chunk system
+
@Override
public void flush(boolean sync) {
- this.worker.synchronize(sync).join();
- this.entityDeserializerQueue.runAll();
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
- private CompoundTag upgradeChunkTag(CompoundTag chunkNbt) {
+ public static CompoundTag upgradeChunkTag(CompoundTag chunkNbt) { // Paper - public and static
int i = getVersion(chunkNbt);
return ca.spottedleaf.dataconverter.minecraft.MCDataConverter.convertTag(ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry.ENTITY_CHUNK, chunkNbt, i, SharedConstants.getCurrentVersion().getWorldVersion()); // Paper - route to new converter system
}
@@ -126,6 +142,6 @@ public class EntityStorage implements EntityPersistentStorage<Entity> {
@Override
public void close() throws IOException {
- this.worker.close();
+ throw new UnsupportedOperationException(); // Paper - rewrite chunk system
}
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
index d51bafd2f5a763b8a49c835ab74a7cf60caa1ab6..7412da51c2eae70f17f4883f7223303d570c8402 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
@@ -44,6 +44,7 @@ public class RegionFile implements AutoCloseable {
private final IntBuffer timestamps;
@VisibleForTesting
protected final RegionBitmap usedSectors;
+ public final java.util.concurrent.locks.ReentrantLock fileLock = new java.util.concurrent.locks.ReentrantLock(true); // Paper
public RegionFile(Path file, Path directory, boolean dsync) throws IOException {
this(file, directory, RegionFileVersion.VERSION_DEFLATE, dsync);
@@ -228,7 +229,7 @@ public class RegionFile implements AutoCloseable {
return (byteCount + 4096 - 1) / 4096;
}
- public boolean doesChunkExist(ChunkPos pos) {
+ public synchronized boolean doesChunkExist(ChunkPos pos) { // Paper - synchronized
int i = this.getOffset(pos);
if (i == 0) {
@@ -393,6 +394,11 @@ public class RegionFile implements AutoCloseable {
}
public void close() throws IOException {
+ // Paper start - Prevent regionfiles from being closed during use
+ this.fileLock.lock();
+ synchronized (this) {
+ try {
+ // Paper end
try {
this.padToFullSector();
} finally {
@@ -402,6 +408,10 @@ public class RegionFile implements AutoCloseable {
this.file.close();
}
}
+ } finally { // Paper start - Prevent regionfiles from being closed during use
+ this.fileLock.unlock();
+ }
+ } // Paper end
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
index 8ba1c073387fa21a20bd42a873ec3cc314eae64e..45cec71b3b2f9444d7be7e5bf9fab166b28ea34d 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
@@ -24,16 +24,37 @@ public class RegionFileStorage implements AutoCloseable {
private final Path folder;
private final boolean sync;
- RegionFileStorage(Path directory, boolean dsync) {
+ protected RegionFileStorage(Path directory, boolean dsync) { // Paper - protected constructor
this.folder = directory;
this.sync = dsync;
}
- private RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit
+ // Paper start
+ public synchronized RegionFile getRegionFileIfLoaded(ChunkPos chunkcoordintpair) {
+ return this.regionCache.getAndMoveToFirst(ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ()));
+ }
+
+ public synchronized boolean chunkExists(ChunkPos pos) throws IOException {
+ RegionFile regionfile = getRegionFile(pos, true);
+
+ return regionfile != null ? regionfile.hasChunk(pos) : false;
+ }
+
+ public synchronized RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit
+ return this.getRegionFile(chunkcoordintpair, existingOnly, false);
+ }
+ public synchronized RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly, boolean lock) throws IOException {
+ // Paper end
long i = ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ());
RegionFile regionfile = (RegionFile) this.regionCache.getAndMoveToFirst(i);
if (regionfile != null) {
+ // Paper start
+ if (lock) {
+ // must be in this synchronized block
+ regionfile.fileLock.lock();
+ }
+ // Paper end
return regionfile;
} else {
if (this.regionCache.size() >= 256) {
@@ -48,6 +69,12 @@ public class RegionFileStorage implements AutoCloseable {
RegionFile regionfile1 = new RegionFile(path1, this.folder, this.sync);
this.regionCache.putAndMoveToFirst(i, regionfile1);
+ // Paper start
+ if (lock) {
+ // must be in this synchronized block
+ regionfile1.fileLock.lock();
+ }
+ // Paper end
return regionfile1;
}
}
@@ -55,11 +82,12 @@ public class RegionFileStorage implements AutoCloseable {
@Nullable
public CompoundTag read(ChunkPos pos) throws IOException {
// CraftBukkit start - SPIGOT-5680: There's no good reason to preemptively create files on read, save that for writing
- RegionFile regionfile = this.getRegionFile(pos, true);
+ RegionFile regionfile = this.getRegionFile(pos, true, true); // Paper
if (regionfile == null) {
return null;
}
// CraftBukkit end
+ try { // Paper
DataInputStream datainputstream = regionfile.getChunkDataInputStream(pos);
CompoundTag nbttagcompound;
@@ -96,6 +124,9 @@ public class RegionFileStorage implements AutoCloseable {
}
return nbttagcompound;
+ } finally { // Paper start
+ regionfile.fileLock.unlock();
+ } // Paper end
}
public void scanChunk(ChunkPos chunkcoordintpair, StreamTagVisitor streamtagvisitor) throws IOException {
@@ -130,7 +161,12 @@ public class RegionFileStorage implements AutoCloseable {
}
protected void write(ChunkPos pos, @Nullable CompoundTag nbt) throws IOException {
- RegionFile regionfile = this.getRegionFile(pos, false); // CraftBukkit
+ RegionFile regionfile = this.getRegionFile(pos, nbt == null, true); // CraftBukkit // Paper // Paper start - rewrite chunk system
+ if (nbt == null && regionfile == null) {
+ return;
+ }
+ // Paper end - rewrite chunk system
+ try { // Paper
if (nbt == null) {
regionfile.clear(pos);
@@ -156,9 +192,12 @@ public class RegionFileStorage implements AutoCloseable {
}
}
+ } finally { // Paper start
+ regionfile.fileLock.unlock();
+ } // Paper end
}
- public void close() throws IOException {
+ public synchronized void close() throws IOException { // Paper -> synchronized
ExceptionCollector<IOException> exceptionsuppressor = new ExceptionCollector<>();
ObjectIterator objectiterator = this.regionCache.values().iterator();
@@ -175,7 +214,7 @@ public class RegionFileStorage implements AutoCloseable {
exceptionsuppressor.throwIfPresent();
}
- public void flush() throws IOException {
+ public synchronized void flush() throws IOException { // Paper - synchronize
ObjectIterator objectiterator = this.regionCache.values().iterator();
while (objectiterator.hasNext()) {
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java
index a0b61647e5a7e5989aed52522bc9a43bc487421c..27f766fc72d779cff1b5a88a79961aa7ef91b11f 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java
@@ -34,27 +34,28 @@ import net.minecraft.world.level.ChunkPos;
import net.minecraft.world.level.LevelHeightAccessor;
import org.slf4j.Logger;
-public class SectionStorage<R> implements AutoCloseable {
+public class SectionStorage<R> extends RegionFileStorage implements AutoCloseable { // Paper - nuke IOWorker
private static final Logger LOGGER = LogUtils.getLogger();
private static final String SECTIONS_TAG = "Sections";
- private final IOWorker worker;
+ // Paper - remove mojang I/O thread
private final Long2ObjectMap<Optional<R>> storage = new Long2ObjectOpenHashMap<>();
public final LongLinkedOpenHashSet dirty = new LongLinkedOpenHashSet();
private final Function<Runnable, Codec<R>> codec;
private final Function<Runnable, R> factory;
private final DataFixer fixerUpper;
private final DataFixTypes type;
- private final RegistryAccess registryAccess;
+ public final RegistryAccess registryAccess; // Paper - rewrite chunk system
protected final LevelHeightAccessor levelHeightAccessor;
public SectionStorage(Path path, Function<Runnable, Codec<R>> codecFactory, Function<Runnable, R> factory, DataFixer dataFixer, DataFixTypes dataFixTypes, boolean dsync, RegistryAccess dynamicRegistryManager, LevelHeightAccessor world) {
+ super(path, dsync); // Paper - remove mojang I/O thread
this.codec = codecFactory;
this.factory = factory;
this.fixerUpper = dataFixer;
this.type = dataFixTypes;
this.registryAccess = dynamicRegistryManager;
this.levelHeightAccessor = world;
- this.worker = new IOWorker(path, dsync, path.getFileName().toString());
+ // Paper - remove mojang I/O thread
}
protected void tick(BooleanSupplier shouldKeepTicking) {
@@ -116,23 +117,21 @@ public class SectionStorage<R> implements AutoCloseable {
}
private void readColumn(ChunkPos pos) {
- Optional<CompoundTag> optional = this.tryRead(pos).join();
- RegistryOps<Tag> registryOps = RegistryOps.create(NbtOps.INSTANCE, this.registryAccess);
- this.readColumn(pos, registryOps, optional.orElse((CompoundTag)null));
+ throw new IllegalStateException("Only chunk system can load in state, offending class:" + this.getClass().getName()); // Paper - rewrite chunk system
}
private CompletableFuture<Optional<CompoundTag>> tryRead(ChunkPos pos) {
- return this.worker.loadAsync(pos).exceptionally((throwable) -> {
- if (throwable instanceof IOException iOException) {
- LOGGER.error("Error reading chunk {} data from disk", pos, iOException);
- return Optional.empty();
- } else {
- throw new CompletionException(throwable);
- }
- });
+ // Paper start - rewrite chunk system
+ try {
+ return CompletableFuture.completedFuture(Optional.ofNullable(this.read(pos)));
+ } catch (Throwable thr) {
+ return CompletableFuture.failedFuture(thr);
+ }
+ // Paper end - rewrite chunk system
}
private <T> void readColumn(ChunkPos pos, DynamicOps<T> ops, @Nullable T data) {
+ if (true) throw new IllegalStateException("Only chunk system can load in state, offending class:" + this.getClass().getName()); // Paper - rewrite chunk system
if (data == null) {
for(int i = this.levelHeightAccessor.getMinSection(); i < this.levelHeightAccessor.getMaxSection(); ++i) {
this.storage.put(getKey(pos, i), Optional.empty());
@@ -177,7 +176,7 @@ public class SectionStorage<R> implements AutoCloseable {
Dynamic<Tag> dynamic = this.writeColumn(pos, registryOps);
Tag tag = dynamic.getValue();
if (tag instanceof CompoundTag) {
- this.worker.store(pos, (CompoundTag)tag);
+ try { this.write(pos, (CompoundTag)tag); } catch (IOException ioexception) { SectionStorage.LOGGER.error("Error writing data to disk", ioexception); } // Paper - nuke IOWorker
} else {
LOGGER.error("Expected compound tag, got {}", (Object)tag);
}
@@ -222,7 +221,7 @@ public class SectionStorage<R> implements AutoCloseable {
}
private static int getVersion(Dynamic<?> dynamic) {
- return dynamic.get("DataVersion").asInt(1945);
+ return dynamic.get("DataVersion").asInt(1945); // Paper - diff on change, constant used in ChunkLoadTask
}
public void flush(ChunkPos pos) {
@@ -240,6 +239,9 @@ public class SectionStorage<R> implements AutoCloseable {
@Override
public void close() throws IOException {
- this.worker.close();
+ //this.worker.close(); // Paper - nuke I/O worker - don't call the worker
+ super.close(); // Paper - nuke I/O worker - call super.close method which is responsible for closing used files.
}
+
+ // Paper - rewrite chunk system
}
diff --git a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java
index 2830d32bba3dc85847e3a5d9b4d98f822e34b606..4cdfc433df67afcd455422e9baf56f167dd712ae 100644
--- a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java
+++ b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java
@@ -8,54 +8,42 @@ import javax.annotation.Nullable;
import net.minecraft.world.entity.Entity;
public class EntityTickList {
- private Int2ObjectMap<Entity> active = new Int2ObjectLinkedOpenHashMap<>();
- private Int2ObjectMap<Entity> passive = new Int2ObjectLinkedOpenHashMap<>();
- @Nullable
- private Int2ObjectMap<Entity> iterated;
+ private final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<Entity> entities = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(true); // Paper - rewrite this, always keep this updated - why would we EVER tick an entity that's not ticking?
private void ensureActiveIsNotIterated() {
- if (this.iterated == this.active) {
- this.passive.clear();
-
- for(Int2ObjectMap.Entry<Entity> entry : Int2ObjectMaps.fastIterable(this.active)) {
- this.passive.put(entry.getIntKey(), entry.getValue());
- }
-
- Int2ObjectMap<Entity> int2ObjectMap = this.active;
- this.active = this.passive;
- this.passive = int2ObjectMap;
- }
+ // Paper - replace with better logic, do not delay removals
}
public void add(Entity entity) {
+ io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist addition"); // Paper
this.ensureActiveIsNotIterated();
- this.active.put(entity.getId(), entity);
+ this.entities.add(entity); // Paper - replace with better logic, do not delay removals/additions
}
public void remove(Entity entity) {
+ io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist removal"); // Paper
this.ensureActiveIsNotIterated();
- this.active.remove(entity.getId());
+ this.entities.remove(entity); // Paper - replace with better logic, do not delay removals/additions
}
public boolean contains(Entity entity) {
- return this.active.containsKey(entity.getId());
+ return this.entities.contains(entity); // Paper - replace with better logic, do not delay removals/additions
}
public void forEach(Consumer<Entity> action) {
- if (this.iterated != null) {
- throw new UnsupportedOperationException("Only one concurrent iteration supported");
- } else {
- this.iterated = this.active;
-
- try {
- for(Entity entity : this.active.values()) {
- action.accept(entity);
- }
- } finally {
- this.iterated = null;
+ io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist iteration"); // Paper
+ // Paper start - replace with better logic, do not delay removals/additions
+ // To ensure nothing weird happens with dimension travelling, do not iterate over new entries...
+ // (by dfl iterator() is configured to not iterate over new entries)
+ io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.Iterator<Entity> iterator = this.entities.iterator();
+ try {
+ while (iterator.hasNext()) {
+ action.accept(iterator.next());
}
-
+ } finally {
+ iterator.finishedIterating();
}
+ // Paper end - replace with better logic, do not delay removals/additions
}
}
diff --git a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java
index e66e52da84408eb705d23504e500bd8a98322b0e..298ea7c5776c4476dbb69e68debbd50376d14165 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java
@@ -90,7 +90,7 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator {
return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("init_biomes", () -> {
this.doCreateBiomes(blender, noiseConfig, structureAccessor, chunk);
return chunk;
- }), Util.backgroundExecutor());
+ }), executor); // Paper - run with supplied executor
}
private void doCreateBiomes(Blender blender, RandomState noiseConfig, StructureManager structureAccessor, ChunkAccess chunk) {
@@ -289,7 +289,7 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator {
return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("wgen_fill_noise", () -> {
return this.doFill(blender, structureAccessor, noiseConfig, chunk, j, k);
- }), Util.backgroundExecutor()).whenCompleteAsync((ichunkaccess1, throwable) -> {
+ }), executor).whenCompleteAsync((ichunkaccess1, throwable) -> { // Paper - run with supplied executor
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
index 6d44634ae6dcbc392011f248f6ab429b9845af55..29465d24b6c9160fcd6293006dcc26bcfbeb5e10 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
@@ -119,7 +119,7 @@ public class CraftChunk implements Chunk {
@Override
public boolean isEntitiesLoaded() {
- return this.getCraftWorld().getHandle().entityManager.areEntitiesLoaded(ChunkPos.asLong(x, z));
+ return this.getCraftWorld().getHandle().areEntitiesLoaded(io.papermc.paper.util.CoordinateUtils.getChunkKey(this.x, this.z)); // Paper - rewrite chunk system
}
@Override
@@ -128,51 +128,7 @@ public class CraftChunk implements Chunk {
this.getWorld().getChunkAt(x, z); // Transient load for this tick
}
- PersistentEntitySectionManager<net.minecraft.world.entity.Entity> entityManager = this.getCraftWorld().getHandle().entityManager;
- long pair = ChunkPos.asLong(x, z);
-
- if (entityManager.areEntitiesLoaded(pair)) {
- return entityManager.getEntities(new ChunkPos(this.x, this.z)).stream()
- .map(net.minecraft.world.entity.Entity::getBukkitEntity)
- .filter(Objects::nonNull).toArray(Entity[]::new);
- }
-
- entityManager.ensureChunkQueuedForLoad(pair); // Start entity loading
-
- // SPIGOT-6772: Use entity mailbox and re-schedule entities if they get unloaded
- ProcessorMailbox<Runnable> mailbox = ((EntityStorage) entityManager.permanentStorage).entityDeserializerQueue;
- BooleanSupplier supplier = () -> {
- // only execute inbox if our entities are not present
- if (entityManager.areEntitiesLoaded(pair)) {
- return true;
- }
-
- if (!entityManager.isPending(pair)) {
- // Our entities got unloaded, this should normally not happen.
- entityManager.ensureChunkQueuedForLoad(pair); // Re-start entity loading
- }
-
- // tick loading inbox, which loads the created entities to the world
- // (if present)
- entityManager.tick();
- // check if our entities are loaded
- return entityManager.areEntitiesLoaded(pair);
- };
-
- // now we wait until the entities are loaded,
- // the converting from NBT to entity object is done on the main Thread which is why we wait
- while (!supplier.getAsBoolean()) {
- if (mailbox.size() != 0) {
- mailbox.run();
- } else {
- Thread.yield();
- LockSupport.parkNanos("waiting for entity loading", 100000L);
- }
- }
-
- return entityManager.getEntities(new ChunkPos(this.x, this.z)).stream()
- .map(net.minecraft.world.entity.Entity::getBukkitEntity)
- .filter(Objects::nonNull).toArray(Entity[]::new);
+ return getCraftWorld().getHandle().getChunkEntities(this.x, this.z); // Paper - rewrite chunk system
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index eb5c7e15366ee5902d8c754a1e9daec50d26fb17..2103081cf6a8db00d78618340eef514082fede6e 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1115,7 +1115,7 @@ public final class CraftServer implements Server {
this.console.addLevel(internal);
this.getServer().prepareLevels(internal.getChunkSource().chunkMap.progressListener, internal);
- internal.entityManager.tick(); // SPIGOT-6526: Load pending entities so they are available to the API
+ //internal.entityManager.tick(); // SPIGOT-6526: Load pending entities so they are available to the API // Paper - rewrite chunk system
this.pluginManager.callEvent(new WorldLoadEvent(internal.getWorld()));
return internal.getWorld();
@@ -1159,7 +1159,7 @@ public final class CraftServer implements Server {
}
handle.getChunkSource().close(save);
- handle.entityManager.close(save); // SPIGOT-6722: close entityManager
+ // handle.entityManager.close(save); // SPIGOT-6722: close entityManager // Paper - rewrite chunk system
handle.convertable.close();
} catch (Exception ex) {
this.getLogger().log(Level.SEVERE, null, ex);
@@ -1974,7 +1974,7 @@ public final class CraftServer implements Server {
@Override
public boolean isPrimaryThread() {
- return Thread.currentThread().equals(console.serverThread) || this.console.hasStopped() || !org.spigotmc.AsyncCatcher.enabled; // All bets are off if we have shut down (e.g. due to watchdog)
+ return io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system
}
// Paper start
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 9a6820b10e4164cc38d269853b5c2a49175cb890..e2c051dd0d639ba28da0f62d06259fcf0d3244ce 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -314,10 +314,14 @@ public class CraftWorld extends CraftRegionAccessor implements World {
ChunkHolder playerChunk = this.world.getChunkSource().chunkMap.getVisibleChunkIfPresent(ChunkPos.asLong(x, z));
if (playerChunk == null) return false;
- playerChunk.getTickingChunkFuture().thenAccept(either -> {
- either.left().ifPresent(chunk -> {
+ // Paper start - rewrite player chunk loader
+ net.minecraft.world.level.chunk.LevelChunk chunk = playerChunk.getSendingChunk();
+ if (chunk == null) {
+ return false;
+ }
+ // Paper end - rewrite player chunk loader
List<ServerPlayer> playersInRange = playerChunk.playerProvider.getPlayers(playerChunk.getPos(), false);
- if (playersInRange.isEmpty()) return;
+ if (playersInRange.isEmpty()) return true; // Paper - rewrite player chunk loader
ClientboundLevelChunkWithLightPacket refreshPacket = new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null, true);
for (ServerPlayer player : playersInRange) {
@@ -325,8 +329,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
player.connection.send(refreshPacket);
}
- });
- });
+ // Paper - rewrite player chunk loader
return true;
}
@@ -404,20 +407,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public Collection<Plugin> getPluginChunkTickets(int x, int z) {
DistanceManager chunkDistanceManager = this.world.getChunkSource().chunkMap.distanceManager;
- SortedArraySet<Ticket<?>> tickets = chunkDistanceManager.tickets.get(ChunkPos.asLong(x, z));
-
- if (tickets == null) {
- return Collections.emptyList();
- }
-
- ImmutableList.Builder<Plugin> ret = ImmutableList.builder();
- for (Ticket<?> ticket : tickets) {
- if (ticket.getType() == TicketType.PLUGIN_TICKET) {
- ret.add((Plugin) ticket.key);
- }
- }
-
- return ret.build();
+ return chunkDistanceManager.getChunkHolderManager().getPluginChunkTickets(x, z); // Paper - rewrite chunk system
}
@Override
@@ -425,7 +415,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
Map<Plugin, ImmutableList.Builder<Chunk>> ret = new HashMap<>();
DistanceManager chunkDistanceManager = this.world.getChunkSource().chunkMap.distanceManager;
- for (Long2ObjectMap.Entry<SortedArraySet<Ticket<?>>> chunkTickets : chunkDistanceManager.tickets.long2ObjectEntrySet()) {
+ for (Long2ObjectMap.Entry<SortedArraySet<Ticket<?>>> chunkTickets : chunkDistanceManager.getChunkHolderManager().getTicketsCopy().long2ObjectEntrySet()) { // Paper - rewrite chunk system
long chunkKey = chunkTickets.getLongKey();
SortedArraySet<Ticket<?>> tickets = chunkTickets.getValue();
@@ -1905,14 +1895,53 @@ public class CraftWorld extends CraftRegionAccessor implements World {
// Spigot start
@Override
public int getViewDistance() {
- return world.spigotConfig.viewDistance;
+ return getHandle().getChunkSource().chunkMap.playerChunkManager.getTargetNoTickViewDistance(); // Paper - replace old player chunk management
}
@Override
public int getSimulationDistance() {
- return world.spigotConfig.simulationDistance;
+ return getHandle().getChunkSource().chunkMap.playerChunkManager.getTargetTickViewDistance(); // Paper - replace old player chunk management
}
// Spigot end
+ // Paper start - view distance api
+ @Override
+ public void setViewDistance(int viewDistance) {
+ if (viewDistance < 2 || viewDistance > 32) {
+ throw new IllegalArgumentException("View distance " + viewDistance + " is out of range of [2, 32]");
+ }
+ net.minecraft.server.level.ChunkMap chunkMap = getHandle().getChunkSource().chunkMap;
+ chunkMap.setViewDistance(viewDistance);
+ }
+
+ @Override
+ public void setSimulationDistance(int simulationDistance) {
+ if (simulationDistance < 2 || simulationDistance > 32) {
+ throw new IllegalArgumentException("Simulation distance " + simulationDistance + " is out of range of [2, 32]");
+ }
+ net.minecraft.server.level.ChunkMap chunkMap = getHandle().getChunkSource().chunkMap;
+ chunkMap.setTickViewDistance(simulationDistance);
+ }
+
+ @Override
+ public int getNoTickViewDistance() {
+ return this.getViewDistance();
+ }
+
+ @Override
+ public void setNoTickViewDistance(int viewDistance) {
+ this.setViewDistance(viewDistance);
+ }
+
+ @Override
+ public int getSendViewDistance() {
+ return getHandle().getChunkSource().chunkMap.playerChunkManager.getTargetSendDistance();
+ }
+
+ @Override
+ public void setSendViewDistance(int viewDistance) {
+ getHandle().getChunkSource().chunkMap.playerChunkManager.setSendDistance(viewDistance);
+ }
+ // Paper end - view distance api
// Spigot start
private final org.bukkit.World.Spigot spigot = new org.bukkit.World.Spigot()
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index d5e6123622f6bbc4c3b8b91be7f9ba8e5c1c22d8..6708c2c88251f4e5f623cd785c14b2d3ed2d3de0 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -174,6 +174,81 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
this.firstPlayed = System.currentTimeMillis();
}
+ // Paper start - implement view distances
+ @Override
+ public int getViewDistance() {
+ net.minecraft.server.level.ChunkMap chunkMap = this.getHandle().getLevel().getChunkSource().chunkMap;
+ io.papermc.paper.chunk.PlayerChunkLoader.PlayerLoaderData data = chunkMap.playerChunkManager.getData(this.getHandle());
+ if (data == null) {
+ return chunkMap.playerChunkManager.getTargetNoTickViewDistance();
+ }
+ return data.getTargetNoTickViewDistance();
+ }
+
+ @Override
+ public void setViewDistance(int viewDistance) {
+ net.minecraft.server.level.ChunkMap chunkMap = this.getHandle().getLevel().getChunkSource().chunkMap;
+ io.papermc.paper.chunk.PlayerChunkLoader.PlayerLoaderData data = chunkMap.playerChunkManager.getData(this.getHandle());
+ if (data == null) {
+ throw new IllegalStateException("Player is not attached to world");
+ }
+
+ data.setTargetNoTickViewDistance(viewDistance);
+ }
+
+ @Override
+ public int getSimulationDistance() {
+ net.minecraft.server.level.ChunkMap chunkMap = this.getHandle().getLevel().getChunkSource().chunkMap;
+ io.papermc.paper.chunk.PlayerChunkLoader.PlayerLoaderData data = chunkMap.playerChunkManager.getData(this.getHandle());
+ if (data == null) {
+ return chunkMap.playerChunkManager.getTargetTickViewDistance();
+ }
+ return data.getTargetTickViewDistance();
+ }
+
+ @Override
+ public void setSimulationDistance(int simulationDistance) {
+ net.minecraft.server.level.ChunkMap chunkMap = this.getHandle().getLevel().getChunkSource().chunkMap;
+ io.papermc.paper.chunk.PlayerChunkLoader.PlayerLoaderData data = chunkMap.playerChunkManager.getData(this.getHandle());
+ if (data == null) {
+ throw new IllegalStateException("Player is not attached to world");
+ }
+
+ data.setTargetTickViewDistance(simulationDistance);
+ }
+
+ @Override
+ public int getNoTickViewDistance() {
+ return this.getViewDistance();
+ }
+
+ @Override
+ public void setNoTickViewDistance(int viewDistance) {
+ this.setViewDistance(viewDistance);
+ }
+
+ @Override
+ public int getSendViewDistance() {
+ net.minecraft.server.level.ChunkMap chunkMap = this.getHandle().getLevel().getChunkSource().chunkMap;
+ io.papermc.paper.chunk.PlayerChunkLoader.PlayerLoaderData data = chunkMap.playerChunkManager.getData(this.getHandle());
+ if (data == null) {
+ return chunkMap.playerChunkManager.getTargetSendDistance();
+ }
+ return data.getTargetSendViewDistance();
+ }
+
+ @Override
+ public void setSendViewDistance(int viewDistance) {
+ net.minecraft.server.level.ChunkMap chunkMap = this.getHandle().getLevel().getChunkSource().chunkMap;
+ io.papermc.paper.chunk.PlayerChunkLoader.PlayerLoaderData data = chunkMap.playerChunkManager.getData(this.getHandle());
+ if (data == null) {
+ throw new IllegalStateException("Player is not attached to world");
+ }
+
+ data.setTargetSendViewDistance(viewDistance);
+ }
+ // Paper end - implement view distances
+
public GameProfile getProfile() {
return this.getHandle().getGameProfile();
}
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
index 19b938f9b86552034c2a0e4af40e342a17f56504..382879562a808290cc4dd59dcd5022c6c22fb169 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
@@ -256,7 +256,7 @@ public class CustomChunkGenerator extends InternalChunkGenerator {
return ichunkaccess1;
};
- return future == null ? CompletableFuture.supplyAsync(() -> function.apply(chunk), net.minecraft.Util.backgroundExecutor()) : future.thenApply(function);
+ return future == null ? CompletableFuture.supplyAsync(() -> function.apply(chunk), executor) : future.thenApply(function); // Paper - run with supplied executor
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java
index 3bedc22c253c3632b5624c05e78ed3671e5d30ce..fbd82b6be6604bf854e01ed5718e4e072f42b265 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java
@@ -254,4 +254,20 @@ public class DummyGeneratorAccess implements WorldGenLevel {
public boolean destroyBlock(BlockPos pos, boolean drop, Entity breakingEntity, int maxUpdateDepth) {
return false; // SPIGOT-6515
}
+
+ // Paper start
+ @Override
+ public List<Entity> getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate) {
+ return java.util.Collections.emptyList();
+ }
+
+ @Override
+ public void getEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into) {}
+
+ @Override
+ public void getHardCollidingEntities(Entity except, AABB box, Predicate<? super Entity> predicate, List<Entity> into) {}
+
+ @Override
+ public <T> void getEntitiesByClass(Class<? extends T> clazz, Entity except, AABB box, List<? super T> into, Predicate<? super T> predicate) {}
+ // Paper end
}
diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
index 38cf408899cef72bc9d2888109a7ac7ce0aec638..d3639643cda7d8ccf3c1208502605120590a2d30 100644
--- a/src/main/java/org/spigotmc/ActivationRange.java
+++ b/src/main/java/org/spigotmc/ActivationRange.java
@@ -132,7 +132,13 @@ public class ActivationRange
ActivationType.ANIMAL.boundingBox = player.getBoundingBox().inflate( animalActivationRange, 256, animalActivationRange );
ActivationType.MONSTER.boundingBox = player.getBoundingBox().inflate( monsterActivationRange, 256, monsterActivationRange );
- world.getEntities().get(maxBB, ActivationRange::activateEntity);
+ // Paper start
+ java.util.List<Entity> entities = world.getEntities((Entity)null, maxBB, null);
+ for (int i = 0; i < entities.size(); i++) {
+ Entity entity = entities.get(i);
+ ActivationRange.activateEntity(entity);
+ }
+ // Paper end
}
MinecraftTimings.entityActivationCheckTimer.stopTiming();
}
diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java
index 78669fa035b7537ff7e533cf32aaf2995625424f..05e94702e42b8f5c35d2a112c486d57948a3acba 100644
--- a/src/main/java/org/spigotmc/AsyncCatcher.java
+++ b/src/main/java/org/spigotmc/AsyncCatcher.java
@@ -9,7 +9,7 @@ public class AsyncCatcher
public static void catchOp(String reason)
{
- if ( (AsyncCatcher.enabled || io.papermc.paper.util.TickThread.STRICT_THREAD_CHECKS) && Thread.currentThread() != MinecraftServer.getServer().serverThread ) // Paper
+ if ( !io.papermc.paper.util.TickThread.isTickThread() ) // Paper // Paper - rewrite chunk system
{
throw new IllegalStateException( "Asynchronous " + reason + "!" );
}
diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
index 335120afc88a8fc1543c2e6df516fd728e3ab032..f1194eb6fdfba60959e00080d0562f2820d13b27 100644
--- a/src/main/java/org/spigotmc/WatchdogThread.java
+++ b/src/main/java/org/spigotmc/WatchdogThread.java
@@ -8,7 +8,7 @@ import java.util.logging.Logger;
import net.minecraft.server.MinecraftServer;
import org.bukkit.Bukkit;
-public class WatchdogThread extends Thread
+public final class WatchdogThread extends io.papermc.paper.util.TickThread // Paper - rewrite chunk system
{
private static WatchdogThread instance;
@@ -83,6 +83,7 @@ public class WatchdogThread extends Thread
//
log.log( Level.SEVERE, "------------------------------" );
log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Spigot!):" );
+ io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(isLongTimeout); // Paper // Paper - rewrite chunk system
WatchdogThread.dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().serverThread.getId(), Integer.MAX_VALUE ), log );
log.log( Level.SEVERE, "------------------------------" );
//
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