c# 多线程 --Mutex(互斥锁) 【转】

互斥锁(Mutex)

互斥锁是一个互斥的同步对象,意味着同一时间有且仅有一个线程可以获取它。

互斥锁可适用于一个共享资源每次只能被一个线程访问的情况

 函数:

//创建一个处于未获取状态的互斥锁

Public Mutex();

//如果owned为true,互斥锁的初始状态就是被主线程所获取,否则处于未获取状态

 Public Mutex(bool owned);

 如果要获取一个互斥锁。应调用互斥锁上的WaitOne()方法,该方法继承于Thread.WaitHandle类

它处于等到状态直至所调用互斥锁可以被获取,因此该方法将组织住主调线程直到指定的互斥锁可用,如果不需要拥有互斥锁,用ReleaseMutex方法释放,从而使互斥锁可以被另外一个线程所获取。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
using System.Threading;
 
namespace MyTTCon
{
     class shareRes
     {
         public static int count = 0;
         public static Mutex mutex = new Mutex();
     }
 
     class IncThread
     {
         int number;
         public Thread thrd;
         public IncThread( string name, int n)
         {
             thrd = new Thread( this .run);
             number = n;
             thrd.Name = name;
             thrd.Start();
         }
         void run()
         {
             Console.WriteLine(thrd.Name + "正在等待 the mutex" );
             //申请
             shareRes.mutex.WaitOne();
             Console.WriteLine(thrd.Name + "申请到 the mutex" );
             do
             {
                 Thread.Sleep(1000);
                 shareRes.count++;
                 Console.WriteLine( "In " + thrd.Name + "ShareRes.count is " + shareRes.count);
                 number--;
             } while (number > 0);
             Console.WriteLine(thrd.Name + "释放 the nmutex" );
             //  释放
             shareRes.mutex.ReleaseMutex();
         }
     }
     class DecThread
     {
         int number;
         public Thread thrd;
         public DecThread( string name, int n)
         {
             thrd = new Thread( this .run);
             number = n;
             thrd.Name = name;
             thrd.Start();
         }
         void run()
         {
             Console.WriteLine(thrd.Name + "正在等待 the mutex" );
             //申请
             shareRes.mutex.WaitOne();
             Console.WriteLine(thrd.Name + "申请到 the mutex" );
             do
             {
                 Thread.Sleep(1000);
                 shareRes.count--;
                 Console.WriteLine( "In " + thrd.Name + "ShareRes.count is " + shareRes.count);
                 number--;
             } while (number > 0);
             Console.WriteLine(thrd.Name + "释放 the nmutex" );
             //  释放
             shareRes.mutex.ReleaseMutex();
         }
     }
 
     class Program
     {
         static void Main( string [] args)
         {
             IncThread mthrd1 = new IncThread( "IncThread thread " , 5);
             DecThread mthrd2 = new DecThread( "DecThread thread " , 5);
             mthrd1.thrd.Join();
             mthrd2.thrd.Join();
         }
     }
}

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转载自www.cnblogs.com/liujianshe1990-/p/10648233.html