Make the recheckGaps method async like other lighting updates

Spigot-Server-Patches/Configurable-async-light-updates.patch

@@ -37,6 +37,39 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              }
  
              this.q = true;
+@@ -0,0 +0,0 @@ public class Chunk {
+ 
+     public void b(boolean flag) {
+         if (this.k && !this.world.worldProvider.o() && !flag) {
+-            this.h(this.world.isClientSide);
++            this.recheckGaps(this.world.isClientSide); // PaperSpigot - Asynchronous lighting updates
+         }
+ 
+         this.p = true;
+@@ -0,0 +0,0 @@ public class Chunk {
+ 
+     }
+ 
++    /**
++     * PaperSpigot - Recheck gaps asynchronously.
++     */
++    public void recheckGaps(final boolean isClientSide) {
++        if (!world.paperSpigotConfig.useAsyncLighting) {
++            this.h(isClientSide);
++            return;
++        }
++
++        world.lightingExecutor.submit(new Runnable() {
++            @Override
++            public void run() {
++                Chunk.this.h(isClientSide);
++            }
++        });
++    }
++
+     public boolean isReady() {
+         // Spigot Start
+         /*
 diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -75,7 +108,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public static boolean haveWeSilencedAPhysicsCrash;
      public static String blockLocation;
      private int tileTickPosition;
-+    private ExecutorService lightingExecutor; // PaperSpigot - Asynchronous lighting updates
++    public ExecutorService lightingExecutor; // PaperSpigot - Asynchronous lighting updates
  
      public static long chunkToKey(int x, int z)
      {
@@ -170,6 +203,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            }
 +        }
 +
++        if (!Bukkit.isPrimaryThread()) {
++            return this.c(enumskyblock, position, chunk, neighbors);
++        }
++
 +        lightingExecutor.submit(new Runnable() {
 +            @Override
 +            public void run() {
@@ -198,6 +235,4 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        log( "World async lighting: " + useAsyncLighting );
 +    }
  }
--- 
-1.9.5.msysgit.1
-
+--

Spigot-Server-Patches/Optimize-explosions.patch

@@ -128,7 +128,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@ public abstract class World implements IBlockAccess {
      public static String blockLocation;
      private int tileTickPosition;
-     private ExecutorService lightingExecutor; // PaperSpigot - Asynchronous lighting updates
+     public ExecutorService lightingExecutor; // PaperSpigot - Asynchronous lighting updates
 +    public final Map<Explosion.CacheKey, Float> explosionDensityCache = new HashMap<Explosion.CacheKey, Float>(); // PaperSpigot - Optimize explosions
  
      public static long chunkToKey(int x, int z)