Paper/Spigot-API-Patches/0132-Add-source-block-to-BlockPhysicsEvent.patch
Aikar 5228a4f24c
Remove deadlock risk in firing async events
The PluginManager incorrectly used synchronization on firing any event
that was marked as synchronous.

This synchronized did not even protect any concurrency risk as
handlers were already thread safe in terms of mutations during event
dispatch.

The way it was used, has commonly led to deadlocks on the server,
which results in a hard crash.

This change removes the synchronize and adds some protection around enable/disable
2018-09-09 01:04:59 -04:00

62 lines
2.1 KiB
Diff

From 3dfdb2062b0760e342784a09056d39c3266df738 Mon Sep 17 00:00:00 2001
From: Sotr <i@omc.hk>
Date: Thu, 23 Aug 2018 16:14:25 +0800
Subject: [PATCH] Add source block to BlockPhysicsEvent
diff --git a/src/main/java/org/bukkit/event/block/BlockPhysicsEvent.java b/src/main/java/org/bukkit/event/block/BlockPhysicsEvent.java
index 01a545b42..57568cd02 100644
--- a/src/main/java/org/bukkit/event/block/BlockPhysicsEvent.java
+++ b/src/main/java/org/bukkit/event/block/BlockPhysicsEvent.java
@@ -12,6 +12,39 @@ public class BlockPhysicsEvent extends BlockEvent implements Cancellable {
private static final HandlerList handlers = new HandlerList();
private final int changed;
private boolean cancel = false;
+ // Paper start - add source block
+ private int sourceX;
+ private int sourceY;
+ private int sourceZ;
+ private Block sourceBlock;
+
+ /**
+ *
+ * @deprecated Magic value
+ * @param block the block involved in this event
+ * @param changed the changed block's type id
+ * @param sourceX the x of the source block
+ * @param sourceY the y of the source block
+ * @param sourceZ the z of the source block
+ */
+ @Deprecated
+ public BlockPhysicsEvent(final Block block, final int changed, final int sourceX, final int sourceY, final int sourceZ) {
+ this(block, changed);
+ this.sourceX = sourceX;
+ this.sourceY = sourceY;
+ this.sourceZ = sourceZ;
+ this.sourceBlock = null;
+ }
+
+ /**
+ * Gets the source block, causing this event
+ *
+ * @return Source block
+ */
+ public Block getSourceBlock() {
+ return sourceBlock == null ? (sourceBlock = block.getWorld().getBlockAt(sourceX, sourceY, sourceZ)) : sourceBlock;
+ }
+ // Paper end
/**
*
@@ -23,6 +56,7 @@ public class BlockPhysicsEvent extends BlockEvent implements Cancellable {
public BlockPhysicsEvent(final Block block, final int changed) {
super(block);
this.changed = changed;
+ this.sourceBlock = block; // Paper - add source block
}
/**
--
2.18.0