实现多用户读/单用户写同步

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ResourceData.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ProcessTest{   /// <summary>   /// 单例模式   /// </summary>   public class ResourceData    {        private static readonly ResourceData instance = new ResourceData();        static ResourceData()        {        }        private ResourceData()        {        }        public static ResourceData Instance        {            get            {                return instance;            }        }        public string DATA;    }}

ResourceBLL.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;namespace ProcessTest{   public class ResourceBLL    {        static System.Threading.ReaderWriterLock rwl = new System.Threading.ReaderWriterLock();        public static string Read()        {            return ResourceData.Instance.DATA;        }        //写数据        public static void Write()        {            try            {                string value;                try                {                    value = DateTime.Now.ToString();                }                catch (Exception)                {                    //获取值时如果出现异常，则不改变选前的值                    //log 同时应该记录到日志当中                    return;                }                ParameterizedThreadStart ParStart = new ParameterizedThreadStart(ThreadMethod);                Thread myThread = new Thread(ParStart);                object param = value;                myThread.Start(param);            }            catch (ApplicationException)            {                //获取写操作锁失败                //log 同时应该记录到日志当中            }        }        public static void ThreadMethod(object ParObject)        {            //Timeout.Infinite  无限延长等待时间            rwl.AcquireWriterLock(Timeout.Infinite);            //Thread.Sleep(1000);测试            ResourceData.Instance.DATA = ParObject as string ;            Console.WriteLine("W:{0}", ParObject);            rwl.ReleaseWriterLock();        }    }}

Program.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;namespace ProcessTest{    class Program    {        static void Main(string[] args)        {            ResourceBLL.Write();            //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();            Console.WriteLine("1");            System.Console.ReadKey();        }        //读数据        static void Read()        {            var length = 50000000;            for (int i = 0; i < length; i++)            {                //Thread.Sleep(20);                //ResourceBLL.Read();                Console.WriteLine("R:{0}", ResourceBLL.Read());            }        }        //写数据        static void Write()        {            var length = 10000000;            for (int i = 0; i < length; i++)            {                Thread.Sleep(500);                ResourceBLL.Write();            }        }    }}

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