87 lines
2.1 KiB
Java
87 lines
2.1 KiB
Java
/*
|
|
* 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 android.util;
|
|
|
|
/**
|
|
* @hide
|
|
*/
|
|
class FinitePool<T extends Poolable<T>> implements Pool<T> {
|
|
/**
|
|
* Factory used to create new pool objects
|
|
*/
|
|
private final PoolableManager<T> mManager;
|
|
/**
|
|
* Maximum number of objects in the pool
|
|
*/
|
|
private final int mLimit;
|
|
/**
|
|
* If true, mLimit is ignored
|
|
*/
|
|
private final boolean mInfinite;
|
|
|
|
/**
|
|
* Next object to acquire
|
|
*/
|
|
private T mRoot;
|
|
/**
|
|
* Number of objects in the pool
|
|
*/
|
|
private int mPoolCount;
|
|
|
|
FinitePool(PoolableManager<T> manager) {
|
|
mManager = manager;
|
|
mLimit = 0;
|
|
mInfinite = true;
|
|
}
|
|
|
|
FinitePool(PoolableManager<T> manager, int limit) {
|
|
if (limit <= 0) throw new IllegalArgumentException("The pool limit must be > 0");
|
|
|
|
mManager = manager;
|
|
mLimit = limit;
|
|
mInfinite = false;
|
|
}
|
|
|
|
public T acquire() {
|
|
T element;
|
|
|
|
if (mRoot != null) {
|
|
element = mRoot;
|
|
mRoot = element.getNextPoolable();
|
|
mPoolCount--;
|
|
} else {
|
|
element = mManager.newInstance();
|
|
}
|
|
|
|
if (element != null) {
|
|
element.setNextPoolable(null);
|
|
mManager.onAcquired(element);
|
|
}
|
|
|
|
return element;
|
|
}
|
|
|
|
public void release(T element) {
|
|
if (mInfinite || mPoolCount < mLimit) {
|
|
mPoolCount++;
|
|
element.setNextPoolable(mRoot);
|
|
mRoot = element;
|
|
}
|
|
mManager.onReleased(element);
|
|
}
|
|
}
|