From 5193eb3c98bfa14ca8eb5767452c8e97f9f495c6 Mon Sep 17 00:00:00 2001
From: Michael Bien <mbien@fh-landshut.de>
Date: Fri, 15 Jan 2010 16:49:17 +0100
Subject: improved QueueBarrier added constructor to restrict barriers to
 certain queues. temporary added getGLObjectType to CLGLContext.

---
 src/com/mbien/opencl/CLGLContext.java  | 38 +++++++++++++++++++++++++++++++++-
 src/com/mbien/opencl/QueueBarrier.java | 37 +++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+), 1 deletion(-)

(limited to 'src/com')

diff --git a/src/com/mbien/opencl/CLGLContext.java b/src/com/mbien/opencl/CLGLContext.java
index abfe4b05..f3edae7f 100644
--- a/src/com/mbien/opencl/CLGLContext.java
+++ b/src/com/mbien/opencl/CLGLContext.java
@@ -10,7 +10,7 @@ import java.nio.LongBuffer;
 import javax.media.nativewindow.DefaultGraphicsConfiguration;
 import javax.media.opengl.GLContext;
 
-import static com.mbien.opencl.CL.*;
+import static com.mbien.opencl.CLGLI.*;
 
 /**
  *
@@ -85,4 +85,40 @@ public final class CLGLContext extends CLContext {
         buffers.add(buffer);
         return buffer;
     }
+
+    // TODO move somewhere else
+    public GLObjectType getGLObjectType(CLBuffer<?> buffer) {
+        int[] array = new int[1];
+        int ret = ((CLGLI)cl).clGetGLObjectInfo(buffer.ID, array, 0, null, 0);
+        CLException.checkForError(ret, "error while asking for gl object info");
+        return GLObjectType.valueOf(array[0]);
+    }
+
+    public enum GLObjectType {
+
+        GL_OBJECT_BUFFER(CL_GL_OBJECT_BUFFER),
+        GL_OBJECT_TEXTURE2D(CL_GL_OBJECT_TEXTURE2D),
+        GL_OBJECT_TEXTURE3D(CL_GL_OBJECT_TEXTURE3D),
+        GL_OBJECT_RENDERBUFFER(CL_GL_OBJECT_RENDERBUFFER);
+
+        public final int TYPE;
+
+        private GLObjectType(int type) {
+            this.TYPE = type;
+        }
+
+        public static GLObjectType valueOf(int type) {
+            if(type == CL_GL_OBJECT_BUFFER)
+                return GL_OBJECT_BUFFER;
+            else if(type == CL_GL_OBJECT_TEXTURE2D)
+                return GL_OBJECT_TEXTURE2D;
+            else if(type == CL_GL_OBJECT_TEXTURE3D)
+                return GL_OBJECT_TEXTURE3D;
+            else if(type == CL_GL_OBJECT_RENDERBUFFER)
+                return GL_OBJECT_RENDERBUFFER;
+            return null;
+        }
+    }
+
+
 }
diff --git a/src/com/mbien/opencl/QueueBarrier.java b/src/com/mbien/opencl/QueueBarrier.java
index 247ede7a..d3a5ab2e 100644
--- a/src/com/mbien/opencl/QueueBarrier.java
+++ b/src/com/mbien/opencl/QueueBarrier.java
@@ -1,5 +1,8 @@
 package com.mbien.opencl;
 
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
@@ -10,9 +13,34 @@ import java.util.concurrent.TimeUnit;
 public class QueueBarrier {
 
     private final CountDownLatch latch;
+    private final Set<CLCommandQueue> queues;
 
     public QueueBarrier(int queueCount) {
         this.latch = new CountDownLatch(queueCount);
+        this.queues = null;
+    }
+
+    public QueueBarrier(CLCommandQueue... allowedQueues) {
+        this.latch = new CountDownLatch(allowedQueues.length);
+
+        HashSet<CLCommandQueue> set = new HashSet<CLCommandQueue>(allowedQueues.length);
+        for (CLCommandQueue queue : allowedQueues) {
+            set.add(queue);
+        }
+        this.queues = Collections.unmodifiableSet(set);
+    }
+
+    /**
+     * Blocks the current Thread until all commands on the CLCommandQueue finished excecution.
+     * This method may be invoked concurrently without synchronization on the QueueBarrier object
+     * as long each Thread passes a distinct CLCommandQueue as parameter to this method.
+     */
+    public QueueBarrier waitFor(CLCommandQueue queue) {
+        checkQueue(queue);
+
+        queue.putBarrier();
+        latch.countDown();
+        return this;
     }
 
     /**
@@ -21,6 +49,8 @@ public class QueueBarrier {
      * as long each Thread passes a distinct CLCommandQueue as parameter to this method.
      */
     public QueueBarrier waitFor(CLCommandQueue queue, CLEventList events) {
+        checkQueue(queue);
+
         queue.putWaitForEvents(events);
         latch.countDown();
         return this;
@@ -35,6 +65,7 @@ public class QueueBarrier {
         latch.await();
         return this;
     }
+    
     /**
      * @see {@link #await()}
      * @param timeout the maximum time to wait
@@ -45,4 +76,10 @@ public class QueueBarrier {
         return this;
     }
 
+    private final void checkQueue(CLCommandQueue queue) throws IllegalArgumentException {
+        if (queues != null && !queues.contains(queue)) {
+            throw new IllegalArgumentException(queue + " is not in the allowedQueues Set: " + queues);
+        }
+    }
+
 }
-- 
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