/* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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. | |
*/ | |
using System; | |
using System.Threading; | |
namespace Apache.NMS.Util | |
{ | |
public class CountDownLatch | |
{ | |
private readonly ManualResetEvent mutex = new ManualResetEvent(false); | |
private int remaining; | |
public CountDownLatch(int i) | |
{ | |
remaining = i; | |
} | |
/// <summary> | |
/// Decrement the count, releasing any waiting Threads when the count reaches Zero. | |
/// </summary> | |
public void countDown() | |
{ | |
lock(mutex) | |
{ | |
if(remaining > 0) | |
{ | |
remaining--; | |
if(0 == remaining) | |
{ | |
mutex.Set(); | |
} | |
} | |
} | |
} | |
/// <summary> | |
/// Gets the current count for this Latch. | |
/// </summary> | |
public int Remaining | |
{ | |
get | |
{ | |
lock(mutex) | |
{ | |
return remaining; | |
} | |
} | |
} | |
/// <summary> | |
/// Causes the current Thread to wait for the count to reach zero, unless | |
/// the Thread is interrupted. | |
/// </summary> | |
public void await() | |
{ | |
this.await(TimeSpan.FromMilliseconds(Timeout.Infinite)); | |
} | |
/// <summary> | |
/// Causes the current thread to wait until the latch has counted down to zero, unless | |
/// the thread is interrupted, or the specified waiting time elapses. | |
/// </summary> | |
public bool await(TimeSpan timeout) | |
{ | |
return mutex.WaitOne((int) timeout.TotalMilliseconds, false); | |
} | |
public WaitHandle AsyncWaitHandle | |
{ | |
get { return mutex; } | |
} | |
} | |
} |