/*
 * Copyright (C) 2005-present, 58.com.  All rights reserved.
 * 
 * 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.wuba.wpaxos.helper;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 互斥锁封装
 */
public class SerialLock {
	private ReentrantLock lock = new ReentrantLock();
	private Condition cond = lock.newCondition();
	
	public void lock() {
		this.lock.lock();
	}
	
	public void unLock() {
		if (this.lock.isLocked()) {
			this.lock.unlock();	
		}
	}
	
	public boolean isLocked() {
		return this.lock.isLocked();
	}
	
	public void waitSomeMs() throws InterruptedException {
		this.cond.await();
	}
	
	public void interupt() {
		this.cond.signal();
	}

	public boolean waitTime(int timeMs) throws InterruptedException {
		return this.cond.await(timeMs, TimeUnit.MILLISECONDS);
	}
}
