1 files changed, 10 insertions, 0 deletions
diff --git a/src/com/jogamp/opencl/util/CLMultiContext.java b/src/com/jogamp/opencl/util/CLMultiContext.java
index eb42092e..156a9fa6 100644
--- a/src/com/jogamp/opencl/util/CLMultiContext.java
+++ b/src/com/jogamp/opencl/util/CLMultiContext.java
@@ -25,6 +25,7 @@ import static com.jogamp.opencl.CLDevice.Type.*;
 public class CLMultiContext implements CLResource {
 
     private final List<CLContext> contexts;
+    private boolean released;
 
     private CLMultiContext() {
         contexts = new ArrayList<CLContext>();
@@ -132,7 +133,12 @@ public class CLMultiContext implements CLResource {
      * Releases all contexts.
      * @see CLContext#release()
      */
+    @Override
     public void release() {
+        if(released) {
+            throw new RuntimeException(getClass().getSimpleName()+" already released");
+        }
+        released = true;
         for (CLContext context : contexts) {
             context.release();
         }
@@ -154,6 +160,10 @@ public class CLMultiContext implements CLResource {
         return devices;
     }
 
+    public boolean isReleased() {
+        return released;
+    }
+
     @Override
     public String toString() {
         return getClass().getSimpleName()+" [" + contexts.size()+" contexts, "