From d7e07a5638d1dffe47df572ae071eb4dabe52426 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Wed, 17 Nov 2010 10:47:13 +0100
Subject: Move shutdown hook registration to GLDrawableFactory. Unregister the
 shutdown hook if called manually (recommended!).

---
 .../javax/media/opengl/GLDrawableFactory.java      | 62 ++++++++++++++++++++--
 src/jogl/classes/javax/media/opengl/GLProfile.java | 26 +--------
 2 files changed, 59 insertions(+), 29 deletions(-)

(limited to 'src/jogl/classes/javax/media')

diff --git a/src/jogl/classes/javax/media/opengl/GLDrawableFactory.java b/src/jogl/classes/javax/media/opengl/GLDrawableFactory.java
index f6dce1c9c..ab23e18f8 100644
--- a/src/jogl/classes/javax/media/opengl/GLDrawableFactory.java
+++ b/src/jogl/classes/javax/media/opengl/GLDrawableFactory.java
@@ -97,10 +97,21 @@ public abstract class GLDrawableFactory {
 
   protected static ArrayList/*<GLDrawableFactoryImpl>*/ glDrawableFactories = new ArrayList();
 
+  // Shutdown hook mechanism for the factory
+  private static boolean factoryShutdownHookRegistered = false;
+  private static Thread factoryShutdownHook = null;
+
   /**
    * Instantiate singleton factories if available, EGLES1, EGLES2 and the OS native ones.
    */
   static {
+    AccessController.doPrivileged(new PrivilegedAction() {
+        public Object run() {
+            registerFactoryShutdownHook();
+            return null;
+        }
+    });
+
     nativeOSType = NativeWindowFactory.getNativeWindowType(true);
 
     GLDrawableFactory tmp = null;
@@ -151,15 +162,38 @@ public abstract class GLDrawableFactory {
     eglFactory = tmp;
   }
 
-  private AbstractGraphicsDevice defaultSharedDevice = null;
+  private static synchronized void registerFactoryShutdownHook() {
+    if (factoryShutdownHookRegistered) {
+        return;
+    }
+    factoryShutdownHook = new Thread(new Runnable() {
+        public void run() {
+            GLDrawableFactory.shutdownImpl();
+        }
+    });
+    AccessController.doPrivileged(new PrivilegedAction() {
+        public Object run() {
+            Runtime.getRuntime().addShutdownHook(factoryShutdownHook);
+            return null;
+        }
+    });
+    factoryShutdownHookRegistered = true;
+  }
 
-  protected GLDrawableFactory() {
-    synchronized(glDrawableFactories) {
-        glDrawableFactories.add(this);
+  private static synchronized void unregisterFactoryShutdownHook() {
+    if (!factoryShutdownHookRegistered) {
+        return;
     }
+    AccessController.doPrivileged(new PrivilegedAction() {
+        public Object run() {
+            Runtime.getRuntime().removeShutdownHook(factoryShutdownHook);
+            return null;
+        }
+    });
+    factoryShutdownHookRegistered = false;
   }
 
-  protected static void shutdown() {
+  private static void shutdownImpl() {
     synchronized(glDrawableFactories) {
         for(int i=0; i<glDrawableFactories.size(); i++) {
             GLDrawableFactory factory = (GLDrawableFactory) glDrawableFactories.get(i);
@@ -169,6 +203,24 @@ public abstract class GLDrawableFactory {
     }
   }
 
+  protected static void shutdown() {
+    AccessController.doPrivileged(new PrivilegedAction() {
+        public Object run() {
+            unregisterFactoryShutdownHook();
+            return null;
+        }
+    });
+    shutdownImpl();
+  }
+
+  private AbstractGraphicsDevice defaultSharedDevice = null;
+
+  protected GLDrawableFactory() {
+    synchronized(glDrawableFactories) {
+        glDrawableFactories.add(this);
+    }
+  }
+
   protected abstract void shutdownInstance();
 
   /**
diff --git a/src/jogl/classes/javax/media/opengl/GLProfile.java b/src/jogl/classes/javax/media/opengl/GLProfile.java
index 878c4024e..02252ac33 100644
--- a/src/jogl/classes/javax/media/opengl/GLProfile.java
+++ b/src/jogl/classes/javax/media/opengl/GLProfile.java
@@ -103,7 +103,6 @@ public class GLProfile {
             // since this skips checking further access
             AccessController.doPrivileged(new PrivilegedAction() {
                 public Object run() {
-                    registerFactoryShutdownHook();
                     initProfilesForDefaultDevices(firstUIActionOnProcess);
                     return null;
                 }
@@ -122,8 +121,9 @@ public class GLProfile {
     /**
      * Manual shutdown method, may be called after your last JOGL use
      * within the running JVM.<br>
-     * This method is called via the JVM shutdown hook.<br>
      * It releases all temporary created resources, ie issues {@link javax.media.opengl.GLDrawableFactory#shutdown()}.<br>
+     * The shutdown implementation is called via the JVM shutdown hook, if not manually invoked here.<br>
+     * Invoke <code>shutdown()</code> manually is recommended, due to the unreliable JVM state within the shutdown hook.<br>
      */
     public static synchronized void shutdown() {
         if(initialized) {
@@ -1065,10 +1065,6 @@ public class GLProfile {
 
     static boolean initialized = false;
 
-    // Shutdown hook mechanism for the factory
-    private static boolean factoryShutdownHookRegistered = false;
-    private static Thread factoryShutdownHook = null;
-
     /**
      * Tries the profiles implementation and native libraries.
      * Throws an GLException if no profile could be found at all.
@@ -1299,24 +1295,6 @@ public class GLProfile {
         return defaultEGLDevice;
     }
 
-    private static synchronized void registerFactoryShutdownHook() {
-        if (factoryShutdownHookRegistered) {
-            return;
-        }
-        factoryShutdownHook = new Thread(new Runnable() {
-            public void run() {
-                GLDrawableFactory.shutdown();
-            }
-        });
-        AccessController.doPrivileged(new PrivilegedAction() {
-            public Object run() {
-                Runtime.getRuntime().addShutdownHook(factoryShutdownHook);
-                return null;
-            }
-        });
-        factoryShutdownHookRegistered = true;
-    }
-
     private static void validateInitialization() {
         if(!initialized) {
             synchronized(GLProfile.class) {
-- 
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