92 lines
4.4 KiB
Diff
92 lines
4.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Fri, 29 May 2020 20:29:02 -0400
|
|
Subject: [PATCH] Synchronize PalettedContainer instead of ReentrantLock
|
|
|
|
Mojang has flaws in their logic about chunks being concurrently
|
|
wrote to. So we constantly see crashes around multiple threads writing.
|
|
|
|
Additionally, java has optimized synchronization so well that its
|
|
in many times faster than trying to manage read wrote locks for low
|
|
contention situations.
|
|
|
|
And this is extremely a low contention situation.
|
|
|
|
diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
index 71fbb476ad081424cc8807c01818f332887ae366..ec285516c2c403b65b2446f20b187628539d96a6 100644
|
|
--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
@@ -34,15 +34,15 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
private final ThreadingDetector threadingDetector = new ThreadingDetector("PalettedContainer");
|
|
|
|
public void acquire() {
|
|
- this.threadingDetector.checkAndLock();
|
|
+ // this.threadingDetector.checkAndLock(); // Paper - disable this - use proper synchronization
|
|
}
|
|
|
|
public void release() {
|
|
- this.threadingDetector.checkAndUnlock();
|
|
+ // this.threadingDetector.checkAndUnlock(); // Paper - disable this
|
|
}
|
|
|
|
public static <T> Codec<PalettedContainer<T>> codec(IdMap<T> idList, Codec<T> entryCodec, PalettedContainer.Strategy provider, T object) {
|
|
- return RecordCodecBuilder.create((instance) -> {
|
|
+ return RecordCodecBuilder.<DiscData<T>>create((instance) -> { // Paper - decompile fixes
|
|
return instance.group(entryCodec.mapResult(ExtraCodecs.orElsePartial(object)).listOf().fieldOf("palette").forGetter(PalettedContainer.DiscData::paletteEntries), Codec.LONG_STREAM.optionalFieldOf("data").forGetter(PalettedContainer.DiscData::storage)).apply(instance, PalettedContainer.DiscData::new);
|
|
}).comapFlatMap((serialized) -> {
|
|
return read(idList, provider, serialized);
|
|
@@ -84,7 +84,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
return data2.palette.idFor(object);
|
|
}
|
|
|
|
- public T getAndSet(int x, int y, int z, T value) {
|
|
+ public synchronized T getAndSet(int x, int y, int z, T value) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
Object var5;
|
|
@@ -107,7 +107,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
return this.data.palette.valueFor(j);
|
|
}
|
|
|
|
- public void set(int x, int y, int z, T value) {
|
|
+ public synchronized void set(int x, int y, int z, T value) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
try {
|
|
@@ -141,7 +141,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
});
|
|
}
|
|
|
|
- public void read(FriendlyByteBuf buf) {
|
|
+ public synchronized void read(FriendlyByteBuf buf) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
try {
|
|
@@ -156,7 +156,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
|
|
}
|
|
|
|
- public void write(FriendlyByteBuf buf) {
|
|
+ public synchronized void write(FriendlyByteBuf buf) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
try {
|
|
@@ -167,7 +167,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
|
|
}
|
|
|
|
- private static <T> DataResult<PalettedContainer<T>> read(IdMap<T> idList, PalettedContainer.Strategy provider, PalettedContainer.DiscData<T> serialized) {
|
|
+ private static synchronized <T> DataResult<PalettedContainer<T>> read(IdMap<T> idList, PalettedContainer.Strategy provider, PalettedContainer.DiscData<T> serialized) { // Paper - synchronize
|
|
List<T> list = serialized.paletteEntries();
|
|
int i = provider.size();
|
|
int j = provider.calculateBitsForSerialization(idList, list.size());
|
|
@@ -206,7 +206,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
|
|
return DataResult.success(new PalettedContainer<>(idList, provider, configuration, bitStorage, list));
|
|
}
|
|
|
|
- private PalettedContainer.DiscData<T> write(IdMap<T> idList, PalettedContainer.Strategy provider) {
|
|
+ private synchronized PalettedContainer.DiscData<T> write(IdMap<T> idList, PalettedContainer.Strategy provider) { // Paper - synchronize
|
|
this.acquire();
|
|
|
|
PalettedContainer.DiscData var12;
|