using System;
using System.Threading;
namespace ProcessTest
{
 class Program
 {
  //资源
  static int theResource = 0;
  //读、写操作锁
  static ReaderWriterLock rwl = new ReaderWriterLock();
  static void Main(string[] args)
  {
   //分别创建2个读操作线程，2个写操作线程，并启动
   Thread tr0 = new Thread(new ThreadStart(Read));
   Thread tr1 = new Thread(new ThreadStart(Read));
   Thread tr2 = new Thread(new ThreadStart(Write));
   Thread tr3 = new Thread(new ThreadStart(Write));
   tr0.Start();
   tr1.Start();
   tr2.Start();
   tr3.Start();
   //等待线程执行完毕
   tr0.Join();
   tr1.Join();
   tr2.Join();
   tr3.Join();
   System.Console.ReadKey();
  }
  //读数据
  static void Read()
  {
   for (int i = 0; i < 3; i++)
   {
    try
    {
     //申请读操作锁，如果在1000ms内未获取读操作锁，则放弃
     rwl.AcquireReaderLock(1000);
     Console.WriteLine("开始读取数据，theResource = {0}", theResource);
     Thread.Sleep(10);
     Console.WriteLine("读取数据结束，theResource = {0}", theResource);
     //释放读操作锁
     rwl.ReleaseReaderLock();
    }
    catch (ApplicationException)
    {
     //获取读操作锁失败的处理
    }
   }
  }
  //写数据
  static void Write()
  {
   for (int i = 0; i < 3; i++)
   {
    try
    {
     //申请写操作锁，如果在1000ms内未获取写操作锁，则放弃
     rwl.AcquireWriterLock(1000);
     Console.WriteLine("开始写数据，theResource = {0}", theResource);
     //将theResource加1
     theResource++;
     Thread.Sleep(100);
     Console.WriteLine("写数据结束，theResource = {0}", theResource);
     //释放写操作锁
     rwl.ReleaseWriterLock();
    }
    catch (ApplicationException)
    {
     //获取写操作锁失败
    }
   }
  }
 }
}