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Paper-Old/Spigot-API-Patches/0030-Reduce-thread-synchronization-in-MetadataStoreBase.patch
Spottedleaf 5c7081fecc Update upstream & fix some chunk related issues (#2177)
* Updated Upstream (Bukkit/CraftBukkit)

Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
45690fe9 SPIGOT-5047: Correct slot types for 1.14 inventories

CraftBukkit Changes:
4090d01f SPIGOT-5047: Correct slot types for 1.14 inventories
e8c08362 SPIGOT-5046: World#getLoadedChunks returning inaccessible cached chunks.
d445af3b SPIGOT-5067: Add item meta for 1.14 spawn eggs

* Bring Chunk load checks in-line with spigot

As of the last upstream merge spigot now checks ticket level status
when returning loaded chunks for a world from api. Now our checks
will respect that decision.

* Fix spawn ticket levels

Vanilla would keep the inner chunks of spawn available for ticking,
however my changes made all chunks non-ticking. Resolve by changing
ticket levels for spawn chunks inside the border to respect this
behavior.


* Make World#getChunkIfLoadedImmediately return only entity ticking chunks

Mojang appears to be using chunks with level > 33 (non-ticking chunks)
as cached chunks and not actually loaded chunks.

* Bring all loaded checks in line with spigot

Loaded chunks must be at least border  chunks, or level <= 33
2019-06-14 03:27:40 +01:00

94 Zeilen
4.3 KiB
Diff

From db3f81a458a83b49003a7a119b920bc5ba79072c Mon Sep 17 00:00:00 2001
From: crast <contact@jamescrasta.com>
Date: Sat, 1 Jun 2013 13:52:30 -0600
Subject: [PATCH] Reduce thread synchronization in MetadataStoreBase
Use ConcurrentHashMap to allow thread-safe access methods and very
limited synchronized portions to allow much higher concurrency in
MetadataStore as well as far less locking, especially on reads
diff --git a/src/main/java/org/bukkit/metadata/MetadataStoreBase.java b/src/main/java/org/bukkit/metadata/MetadataStoreBase.java
index 027953499..b3d85d973 100644
--- a/src/main/java/org/bukkit/metadata/MetadataStoreBase.java
+++ b/src/main/java/org/bukkit/metadata/MetadataStoreBase.java
@@ -12,7 +12,7 @@ import org.bukkit.plugin.Plugin;
import org.jetbrains.annotations.NotNull;
public abstract class MetadataStoreBase<T> {
- private Map<String, Map<Plugin, MetadataValue>> metadataMap = new HashMap<String, Map<Plugin, MetadataValue>>();
+ private Map<String, Map<Plugin, MetadataValue>> metadataMap = new java.util.concurrent.ConcurrentHashMap<String, Map<Plugin, MetadataValue>>(); // Paper
/**
* Adds a metadata value to an object. Each metadata value is owned by a
@@ -46,7 +46,9 @@ public abstract class MetadataStoreBase<T> {
entry = new WeakHashMap<Plugin, MetadataValue>(1);
metadataMap.put(key, entry);
}
- entry.put(owningPlugin, newMetadataValue);
+ synchronized (entry) {
+ entry.put(owningPlugin, newMetadataValue);
+ }
}
/**
@@ -60,10 +62,11 @@ public abstract class MetadataStoreBase<T> {
* @see MetadataStore#getMetadata(Object, String)
*/
@NotNull
- public synchronized List<MetadataValue> getMetadata(@NotNull T subject, @NotNull String metadataKey) {
+ public List<MetadataValue> getMetadata(@NotNull T subject, @NotNull String metadataKey) { // Paper
String key = disambiguate(subject, metadataKey);
- if (metadataMap.containsKey(key)) {
- Collection<MetadataValue> values = metadataMap.get(key).values();
+ Map<Plugin, MetadataValue> entry = metadataMap.get(key);
+ if (entry != null) {
+ Collection<MetadataValue> values = entry.values();
return Collections.unmodifiableList(new ArrayList<MetadataValue>(values));
} else {
return Collections.emptyList();
@@ -78,7 +81,7 @@ public abstract class MetadataStoreBase<T> {
* @param metadataKey the unique metadata key being queried.
* @return the existence of the metadataKey within subject.
*/
- public synchronized boolean hasMetadata(@NotNull T subject, @NotNull String metadataKey) {
+ public boolean hasMetadata(@NotNull T subject, @NotNull String metadataKey) { // Paper
String key = disambiguate(subject, metadataKey);
return metadataMap.containsKey(key);
}
@@ -94,17 +97,18 @@ public abstract class MetadataStoreBase<T> {
* org.bukkit.plugin.Plugin)
* @throws IllegalArgumentException If plugin is null
*/
- public synchronized void removeMetadata(@NotNull T subject, @NotNull String metadataKey, @NotNull Plugin owningPlugin) {
+ public void removeMetadata(@NotNull T subject, @NotNull String metadataKey, @NotNull Plugin owningPlugin) { // Paper
Validate.notNull(owningPlugin, "Plugin cannot be null");
String key = disambiguate(subject, metadataKey);
Map<Plugin, MetadataValue> entry = metadataMap.get(key);
if (entry == null) {
return;
}
-
- entry.remove(owningPlugin);
- if (entry.isEmpty()) {
- metadataMap.remove(key);
+ synchronized (entry) {
+ entry.remove(owningPlugin);
+ if (entry.isEmpty()) {
+ metadataMap.remove(key);
+ }
}
}
@@ -117,7 +121,7 @@ public abstract class MetadataStoreBase<T> {
* @see MetadataStore#invalidateAll(org.bukkit.plugin.Plugin)
* @throws IllegalArgumentException If plugin is null
*/
- public synchronized void invalidateAll(@NotNull Plugin owningPlugin) {
+ public void invalidateAll(@NotNull Plugin owningPlugin) { // Paper
Validate.notNull(owningPlugin, "Plugin cannot be null");
for (Map<Plugin, MetadataValue> values : metadataMap.values()) {
if (values.containsKey(owningPlugin)) {
--
2.21.0