1 files changed, 42 insertions, 6 deletions

diff --git a/src/jogl/classes/jogamp/opengl/GLRunnableTask.java b/src/jogl/classes/jogamp/opengl/GLRunnableTask.java
index 448f68423..6de92f533 100644
--- a/src/jogl/classes/jogamp/opengl/GLRunnableTask.java
+++ b/src/jogl/classes/jogamp/opengl/GLRunnableTask.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,12 +20,12 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl;
 
 import javax.media.opengl.GLRunnable;
@@ -39,7 +39,8 @@ public class GLRunnableTask implements GLRunnable {
     GLRunnable runnable;
     Object notifyObject;
     boolean catchExceptions;
-    boolean isExecuted;
+    volatile boolean isExecuted;
+    volatile boolean isFlushed;
 
     Throwable runnableException;
 
@@ -48,8 +49,10 @@ public class GLRunnableTask implements GLRunnable {
         this.notifyObject = notifyObject ;
         this.catchExceptions = catchExceptions;
         isExecuted = false;
+        isFlushed = false;
     }
 
+    @Override
     public boolean run(GLAutoDrawable drawable) {
         boolean res = true;
         if(null == notifyObject) {
@@ -85,7 +88,40 @@ public class GLRunnableTask implements GLRunnable {
         return res;
     }
 
+    /**
+     * Simply flush this task and notify a waiting executor.
+     * The executor which might have been blocked until notified
+     * will be unblocked and the task removed from the queue.
+     *
+     * @see #isFlushed()
+     * @see #isInQueue()
+     */
+    public void flush() {
+        if(!isExecuted() && null != notifyObject) {
+            synchronized (notifyObject) {
+                isFlushed=true;
+                notifyObject.notifyAll();
+            }
+        }
+    }
+
+    /**
+     * @return !{@link #isExecuted()} && !{@link #isFlushed()}
+     */
+    public boolean isInQueue() { return !isExecuted && !isFlushed; }
+
+    /**
+     * @return whether this task has been executed.
+     * @see #isInQueue()
+     */
     public boolean isExecuted() { return isExecuted; }
+
+    /**
+     * @return whether this task has been flushed.
+     * @see #isInQueue()
+     */
+    public boolean isFlushed() { return isFlushed; }
+
     public Throwable getThrowable() { return runnableException; }
 }