From 20537ab57e76541ab408ae395f12f745b3f66e1e Mon Sep 17 00:00:00 2001
From: Elias Naur <elias.naur@gmail.com>
Date: Sat, 24 Jul 2004 16:29:15 +0000
Subject: [PATCH] Use WeakHashMap in the static mapping from contexts to vbo
 trackers in VBOTracker.java.

---
 src/java/org/lwjgl/opengl/GLContext.java  |  2 +-
 src/java/org/lwjgl/opengl/Pbuffer.java    |  1 -
 src/java/org/lwjgl/opengl/VBOTracker.java | 15 ++-------------
 3 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/src/java/org/lwjgl/opengl/GLContext.java b/src/java/org/lwjgl/opengl/GLContext.java
index 990498ca..fa37bde8 100644
--- a/src/java/org/lwjgl/opengl/GLContext.java
+++ b/src/java/org/lwjgl/opengl/GLContext.java
@@ -252,7 +252,7 @@ public final class GLContext {
 			GL11.initNativeStubs();
 			loadStubs();
 			currentContext = new WeakReference(context);
-			VBOTracker.setCurrent(currentContext);
+			VBOTracker.setCurrent(context);
 		} catch (LWJGLException e) {
 			if (did_auto_load)
 				unloadOpenGLLibrary();
diff --git a/src/java/org/lwjgl/opengl/Pbuffer.java b/src/java/org/lwjgl/opengl/Pbuffer.java
index c88d2c2e..d042d827 100644
--- a/src/java/org/lwjgl/opengl/Pbuffer.java
+++ b/src/java/org/lwjgl/opengl/Pbuffer.java
@@ -244,7 +244,6 @@ public final class Pbuffer {
 	 * the current rendering context or not.
 	 */
 	public synchronized void destroy() {
-		VBOTracker.remove(this);
 		try {
 			makeCurrent();
 			int error = GL11.glGetError();
diff --git a/src/java/org/lwjgl/opengl/VBOTracker.java b/src/java/org/lwjgl/opengl/VBOTracker.java
index 5b78eb45..d114ffd2 100644
--- a/src/java/org/lwjgl/opengl/VBOTracker.java
+++ b/src/java/org/lwjgl/opengl/VBOTracker.java
@@ -31,7 +31,7 @@
  */
 package org.lwjgl.opengl;
 
-import java.util.HashMap;
+import java.util.WeakHashMap;
 import java.util.Map;
 
 /**
@@ -40,7 +40,7 @@ import java.util.Map;
 class VBOTracker {
 	private static VBOTracker current_tracker = null;
 	
-	private static final Map contextToTracker = new HashMap(3, 1.0f);
+	private static final Map contextToTracker = new WeakHashMap(3, 1.0f);
 
 	private final StateStack vbo_array_stack;
 	private final StateStack vbo_element_stack;
@@ -77,15 +77,4 @@ class VBOTracker {
 			contextToTracker.put(context, current_tracker);
 		}
 	}
-	
-	/**
-	 * Remove a context when it is about to be destroyed.
-	 * @param context
-	 */
-	static synchronized void remove(Object context) {
-		contextToTracker.remove(context);
-		if (current_tracker == context) {
-			current_tracker = null;
-		}
-	}
 }