R3944Realms/ModernFix-fix
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Merge remote-tracking branch 'origin/1.18' into 1.19.2

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embeddedt 2023-08-13 16:36:02 -04:00
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forge/src/main/java/org/embeddedt/modernfix/forge/mixin/bugfix/chunk_deadlock/ChunkMapLoadMixin.java Normal file
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package org.embeddedt.modernfix.forge.mixin.bugfix.chunk_deadlock;
import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
import net.minecraft.server.level.ChunkHolder;
import net.minecraft.server.level.ChunkMap;
import net.minecraft.world.level.chunk.LevelChunk;
import net.minecraftforge.fml.util.ObfuscationReflectionHelper;
import org.embeddedt.modernfix.ModernFix;
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 java.lang.reflect.Field;
@Mixin(ChunkMap.class)
public abstract class ChunkMapLoadMixin {
@Shadow @Nullable protected abstract ChunkHolder getVisibleChunkIfPresent(long l);
private static final Field currentlyLoadingField = ObfuscationReflectionHelper.findField(ChunkHolder.class, "currentlyLoading");
private static void setCurrentlyLoading(ChunkHolder holder, LevelChunk value) {
try {
currentlyLoadingField.set(holder, value);
} catch(ReflectiveOperationException e) {
e.printStackTrace();
}
}
/**
* Set currentlyLoading before calling runPostLoad and restore its old value afterwards. We track the old value
* to avoid conflicting with Forge if/when this feature is added.
*/
@WrapOperation(method = "*", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/level/chunk/LevelChunk;runPostLoad()V"))
private void setCurrentLoadingThenPostLoad(LevelChunk chunk, Operation<Void> operation) {
ChunkHolder holder = this.getVisibleChunkIfPresent(chunk.getPos().toLong());
if(holder != null) {
LevelChunk prevLoading = null;
try {
prevLoading = (LevelChunk)currentlyLoadingField.get(holder);
} catch(ReflectiveOperationException e) {
e.printStackTrace();
}
try {
setCurrentlyLoading(holder, chunk);
operation.call(chunk);
} finally {
setCurrentlyLoading(holder, prevLoading);
}
} else {
ModernFix.LOGGER.warn("Unable to find chunk holder for loading chunk");
operation.call(chunk);
}
}
}