C#Monitor与线程同步

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

//线程同步与多线程程序中的隐患
namespace Multithreading_hazard
{
    class Program
    {
        private static int stickets = 100;
        static  object gloalObj=new object();//辅助对象
        static void Main(string[] args)
        {
            Thread thread1 = new Thread(SaleTicketThread1);
            Thread thread2 = new Thread(SaleTicketThread2);
            thread1.Start();
            thread2.Start();
            Thread.Sleep(4000);
        }

        private static void SaleTicketThread1()
        {
            while (true)
            {
                try
                {
                    Monitor.Enter(gloalObj);//在gloalObj对象上获得排他锁
                    Thread.Sleep(1);
                    if (stickets > 0)
                    {
                        Console.WriteLine("线程一出票{0}:", stickets--);
                    }
                    else
                    {
                        break;
                    }
                }
                finally 
                {
                    
                    Monitor.Exit(gloalObj);//释放指定对象上的排他锁
                }
                
            }
        }
        private static void SaleTicketThread2()
        {
            while (true)
            {

                try
                {
                    Monitor.Enter(gloalObj);//在gloalObj对象上获得排他锁
                    Thread.Sleep(1);
                    if (stickets > 0)
                    {
                        Console.WriteLine("线程二出票{0}:", stickets--);
                    }
                    else
                    {
                        break;
                    }
                }
                finally
                {

                    Monitor.Exit(gloalObj);//释放指定对象上的排他锁
                }
            }
        }
    }

}