redesigned CLCommandQueuePool.

1 files changed, 21 insertions, 2 deletions

diff --git a/src/com/jogamp/opencl/util/concurrent/CLTask.java b/src/com/jogamp/opencl/util/concurrent/CLTask.java
index 0cfd24a5..04d433c8 100644
--- a/src/com/jogamp/opencl/util/concurrent/CLTask.java
+++ b/src/com/jogamp/opencl/util/concurrent/CLTask.java
@@ -3,16 +3,35 @@
  */
 package com.jogamp.opencl.util.concurrent;
 
+import com.jogamp.opencl.CLCommandQueue;
+
 
 /**
  * A task executed on a command queue.
  * @author Michael Bien
  */
-public interface CLTask<C extends CLQueueContext, R> {
+public abstract class CLTask<C extends CLQueueContext, R> {
+
+
+    /**
+     * Creates a CLQueueContext for this task. A context may contain static resources
+     * like OpenCL program binaries or pre allocated buffers. A context can be used by an group
+     * of tasks identified by a common context key ({@link #getContextKey()}). This method
+     * won't be called if a context was already created by an previously executed task with the
+     * same context key as this task.
+     */
+    public abstract C createQueueContext(CLCommandQueue queue);
+
+    /**
+     * Returns the context key for this task. Default implementation returns {@link #getClass()}.
+     */
+    public Object getContextKey() {
+        return getClass();
+    }
 
     /**
      * Runs the task on a queue and returns a result.
      */
-    R execute(C context);
+    public abstract R execute(C context);
 
 }