Java：ManualResetEvent

package net.csdn.blog.jhqin.util;

public class ManualResetEvent 
{
	private final Object monitor = new Object();
	private volatile boolean open = false;
	
	public ManualResetEvent(boolean initialState)
	{
		open = initialState;
	}

	public boolean WaitOne() 
			throws InterruptedException
	{
		synchronized (monitor) 
		{
			if (!open) monitor.wait();
			return open;
		}
	}

	public boolean WaitOne (long timeout) 
			throws InterruptedException
	{
		synchronized (monitor)
		{
			if (!open) monitor.wait(timeout);
			return open;
		}
	}
	
	public void Set()
	{
		synchronized (monitor)
		{
			open = true;
			monitor.notifyAll();
		}
	}

	public void Reset()
	{
		open = false;
	}
}