GLContext*/GLDrawableHelper: Fix consistency of recursive makeCurrent()/release()/destroy() calls ; Enable context switch tracing ; GLCanvas: proper AbstractGraphicsDevice destruction

GLContext*/GLDrawableHelper: Fix consistency of recursive makeCurrent()/release()/destroy() calls
  Utilizing volatile and lock.tryLock(0) for lockConsiderFailFast(),
  reducing redundant synchronization and using RecursiveLock implicit sync.

  GLContext 'early-out' is the case where the thread already holds the
  context, ie. context is already current and the native makeCurrent is skipped.

  makeCurrent()'s 'early-out' w/o incr. the recursive lock of GLContext
  and it's NativeSurface could lead to asymetry in lock/unlock count
  with release()/destroy() calls. The 1st release actually released the
  native ctx already.
  Properly utilize recursive lock/unlock in all cases and impl. 'early-out' after locking.

  Following the above in GLDrawableHelper.invokeGL()'s 'early-out' case as well,
  ie calling makeCurrent()/release() symmetrical.

  Introduce GLDrawableHelper.disposeGL(), which issues dispose on all GLEventListeners
  within a current context and issued context destruction directly.
  This simplifies GLAutodrawable's destroy/dispose calls and ensures
  that the above sequence of events happens atomically (lock is being hold until destruction).

Enable context switch tracing
  If property 'jogl.debug.GLContext.TraceSwitch' is defined, trace context switch.

GLCanvas: proper AbstractGraphicsDevice destruction

1 files changed, 22 insertions, 30 deletions

diff --git a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
index 0d28ab31b..7a87882ca 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
@@ -284,27 +284,24 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable, WindowClosing
         animatorPaused = animator.pause();
       }
 
-      final GLDrawable drawable = backend.getDrawable();
-      final GLContext context = backend.getContext();
-      
-      if (Threading.isSingleThreaded() &&
-          !Threading.isOpenGLThread()) {
-          // Workaround for termination issues with applets --
-          // sun.applet.AppletPanel should probably be performing the
-          // remove() call on the EDT rather than on its own thread
-          if (ThreadingImpl.isAWTMode() &&
-              Thread.holdsLock(getTreeLock())) {
-            // The user really should not be invoking remove() from this
-            // thread -- but since he/she is, we can not go over to the
-            // EDT at this point. Try to destroy the context from here.
-            if(context.isCreated()) {
-                drawableHelper.invokeGL(drawable, context, disposeAction, null);
-            }
-          } else if(context.isCreated()) {
-            Threading.invokeOnOpenGLThread(disposeOnEventDispatchThreadAction);
+      if(backend.getContext().isCreated()) {      
+          if (Threading.isSingleThreaded() &&
+              !Threading.isOpenGLThread()) {
+              // Workaround for termination issues with applets --
+              // sun.applet.AppletPanel should probably be performing the
+              // remove() call on the EDT rather than on its own thread
+              if (ThreadingImpl.isAWTMode() &&
+                  Thread.holdsLock(getTreeLock())) {
+                // The user really should not be invoking remove() from this
+                // thread -- but since he/she is, we can not go over to the
+                // EDT at this point. Try to destroy the context from here.
+                drawableHelper.disposeGL(GLJPanel.this, backend.getDrawable(), backend.getContext(), postDisposeAction);
+              } else {
+                Threading.invokeOnOpenGLThread(disposeOnEventDispatchThreadAction);
+              }
+          } else {
+              drawableHelper.disposeGL(GLJPanel.this, backend.getDrawable(), backend.getContext(), postDisposeAction);
           }
-      } else if(context.isCreated()) {
-          drawableHelper.invokeGL(drawable, context, disposeAction, null);
       }
       if(null != backend) {
           // not yet destroyed due to backend.isUsingOwnThreadManagment() == true
@@ -689,12 +686,8 @@ public void reshape(int x, int y, int width, int height) {
     return "AWT-GLJPanel[ "+((null!=backend)?backend.getDrawable().getClass().getName():"null-drawable")+"]";
   }
 
-  private DisposeAction disposeAction = new DisposeAction();
-
-  class DisposeAction implements Runnable {
+  class PostDisposeAction implements Runnable {
       public void run() {
-          updater.dispose(GLJPanel.this);
-
           if (backend != null && !backend.isUsingOwnThreadManagment()) {
               backend.destroy();
               backend = null;
@@ -702,13 +695,14 @@ public void reshape(int x, int y, int width, int height) {
           }
       }
   }
+  private PostDisposeAction postDisposeAction = new PostDisposeAction();
 
   private DisposeOnEventDispatchThreadAction disposeOnEventDispatchThreadAction =
     new DisposeOnEventDispatchThreadAction();
 
   class DisposeOnEventDispatchThreadAction implements Runnable {
     public void run() {
-      drawableHelper.invokeGL(backend.getDrawable(), backend.getContext(), disposeAction, null);
+      drawableHelper.disposeGL(GLJPanel.this, backend.getDrawable(), backend.getContext(), postDisposeAction);
     }
   }
   
@@ -1579,15 +1573,13 @@ public void reshape(int x, int y, int width, int height) {
                 backend = null;
                 oglPipelineEnabled = false;
                 handleReshape = true;
-                j2dContext.release();
                 j2dContext.destroy();
                 j2dContext = null;
                 return;
               }
-              j2dContext.release();
+            } else {
+              j2dContext.makeCurrent();
             }
-
-            j2dContext.makeCurrent();
             try {
               captureJ2DState(j2dContext.getGL(), g);
               Object curSurface = Java2D.getOGLSurfaceIdentifier(g);