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Merge 1.19.2 into 1.19.4

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embeddedt 2023-08-24 21:47:03 -04:00
commit fa5b947442
1 changed files with 57 additions and 0 deletions
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forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/chunk_deadlock/ServerChunkCache_CurrentLoadingMixin.java Normal file
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package org.embeddedt.modernfix.forge.mixin.bugfix.chunk_deadlock;
import net.minecraft.server.level.ChunkHolder;
import net.minecraft.server.level.ServerChunkCache;
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 net.minecraftforge.fml.util.ObfuscationReflectionHelper;
import org.jetbrains.annotations.Nullable;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.Field;
@Mixin(ServerChunkCache.class)
public abstract class ServerChunkCache_CurrentLoadingMixin {
@Shadow @Nullable protected abstract ChunkHolder getVisibleChunkIfPresent(long l);
private static final MethodHandle CURRENTLY_LOADING;
static {
try {
Field currentlyLoadingField = ObfuscationReflectionHelper.findField(ChunkHolder.class, "currentlyLoading");
currentlyLoadingField.setAccessible(true);
CURRENTLY_LOADING = MethodHandles.lookup().unreflectGetter(currentlyLoadingField);
} catch(Exception e) {
throw new RuntimeException("Failed to get currentlyLoading field", e);
}
}
/**
* Check the currentlyLoading field before going to the future chain, as was done in 1.16. In 1.18 upstream seems
* to have only applied this to getChunkNow().
*/
@Inject(method = "getChunk", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/level/ServerChunkCache;getChunkFutureMainThread(IILnet/minecraft/world/level/chunk/ChunkStatus;Z)Ljava/util/concurrent/CompletableFuture;"), cancellable = true)
private void checkCurrentlyLoading(int chunkX, int chunkZ, ChunkStatus requiredStatus, boolean load, CallbackInfoReturnable<ChunkAccess> cir) {
long i = ChunkPos.asLong(chunkX, chunkZ);
ChunkHolder holder = this.getVisibleChunkIfPresent(i);
if(holder != null) {
LevelChunk c;
try {
c = (LevelChunk)CURRENTLY_LOADING.invokeExact(holder);
} catch(Throwable e) {
e.printStackTrace();
c = null;
}
if(c != null)
cir.setReturnValue(c);
}
}
}