/*
* Copyright (c) 2009-2016 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.opencl;
import java.lang.ref.PhantomReference;
import java.lang.ref.ReferenceQueue;
import java.util.HashSet;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author shaman
*/
public class OpenCLObjectManager {
private static final Logger LOG = Logger.getLogger(OpenCLObjectManager.class.getName());
private static final Level LOG_LEVEL1 = Level.FINER;
private static final Level LOG_LEVEL2 = Level.FINE;
/**
* Call Runtime.getRuntime().gc() every these frames
*/
private static final int GC_FREQUENCY = 10;
private static final OpenCLObjectManager INSTANCE = new OpenCLObjectManager();
private OpenCLObjectManager() {}
public static OpenCLObjectManager getInstance() {
return INSTANCE;
}
private ReferenceQueue<Object> refQueue = new ReferenceQueue<Object>();
private HashSet<OpenCLObjectRef> activeObjects = new HashSet<OpenCLObjectRef>();
private int gcCounter = 0;
private static class OpenCLObjectRef extends PhantomReference<Object> {
private OpenCLObject.ObjectReleaser releaser;
public OpenCLObjectRef(ReferenceQueue<Object> refQueue, OpenCLObject obj){
super(obj, refQueue);
releaser = obj.getReleaser();
}
}
public void registerObject(OpenCLObject obj) {
OpenCLObjectRef ref = new OpenCLObjectRef(refQueue, obj);
activeObjects.add(ref);
LOG.log(LOG_LEVEL1, "registered OpenCL object: {0}", obj);
}
private void deleteObject(OpenCLObjectRef ref) {
LOG.log(LOG_LEVEL1, "deleting OpenCL object by: {0}", ref.releaser);
ref.releaser.release();
activeObjects.remove(ref);
}
public void deleteUnusedObjects() {
if (activeObjects.isEmpty()) {
LOG.log(LOG_LEVEL2, "no active natives");
return; //nothing to do
}
gcCounter++;
if (gcCounter >= GC_FREQUENCY) {
//The program is that the OpenCLObjects are so small that they are
//enqueued for finalization very late. Therefore, without this
//hack, we are running out of host memory on the OpenCL side quickly.
gcCounter = 0;
Runtime.getRuntime().gc();
}
int removed = 0;
while (true) {
// Remove objects reclaimed by GC.
OpenCLObjectRef ref = (OpenCLObjectRef) refQueue.poll();
if (ref == null) {
break;
}
deleteObject(ref);
removed++;
}
if (removed >= 1) {
LOG.log(LOG_LEVEL2, "{0} native objects were removed from native", removed);
}
}
public void deleteAllObjects() {
for (OpenCLObjectRef ref : activeObjects) {
LOG.log(LOG_LEVEL1, "deleting OpenCL object by: {0}", ref.releaser);
ref.releaser.release();
}
activeObjects.clear();
}
}