| /* |
| * 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(); |
| } |
| } |
| } |