/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cooliris.media;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReferenceArray;
public final class ConcurrentPool<E extends Object> {
private AtomicReferenceArray<E> mFreeList;
private AtomicInteger mFreeListIndex;
public ConcurrentPool(E[] objects) {
mFreeList = new AtomicReferenceArray<E>(objects);
mFreeListIndex = new AtomicInteger(objects.length);
}
public E create() {
final int index = mFreeListIndex.decrementAndGet();
E object = mFreeList.get(index);
mFreeList.set(index, null);
return object;
}
public void delete(E object) {
final int index = mFreeListIndex.getAndIncrement();
while (!mFreeList.compareAndSet(index, null, object)) {
Thread.yield();
}
}
}