package com.inmind.thread_safe_lock07;

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

//卖票任务:就是卖100张票
public class TicketTask implements Runnable{
    int ticketCount = 100;//100张票
    Lock lock = new ReentrantLock();//Lock对象

    @Override
    public void run() {
        //有票就卖
        while (true) {
//            synchronized (lock){//同步代码块：只有拥有锁对象的线程才能进入同步代码块去执行
            lock.lock();//加锁
                //如果有票就卖
                if (ticketCount > 0) {
                    try {
                        Thread.sleep(50);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(Thread.currentThread().getName() + "正在卖第" + ticketCount + "张票");
                    ticketCount--;
                } else {
                    break;
                }
                lock.unlock();//释放锁
//            }//当线程执行完毕该同步代码块之后，锁对象就会释放
        }
    }
}