一、简介
Mutex的突出特点是可以跨应用程序域边界对资源进行独占访问，即可以用于同步不同进程中的线程，这种功能当然这是以牺牲更多的系统资源为代价的。.
主要常用的两个方法:
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public virtual bool WaitOne() 阻止当前线程，直到当前 System.Threading.WaitHandle 收到信号获取互斥锁。
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public void ReleaseMutex() 释放 System.Threading.Mutex 一次。
二、代码
案例一：
class Program{private static Mutex mutex = new Mutex();static void Main(string[] args){Thread[] thread = new Thread[3];for (int i = 0; i < 3; i++){thread[i] = new Thread(ThreadMethod1);//方法引用thread[i].Name = "Thread-" + (i+1).ToString();}for (int i = 0; i < 3; i++){thread[i].Start();}Console.ReadKey();}public static void ThreadMethod1(object val){mutex.WaitOne(); //获取锁for (int i = 1; i <=5; i++){Console.WriteLine("{0}循環了{1}次", Thread.CurrentThread.Name, i);}mutex.ReleaseMutex(); //释放锁}}
运行结果：
案例二：
class Program{private static Mutex mutex = new Mutex();private static int sum = 0;static void Main(string[] args){Task<int> task = new Task<int>(ThreadFunction);task.Start();Console.WriteLine($"{DateTime.Now} task started!");Thread.Sleep(2000);//Main主線程Console.WriteLine($"{DateTime.Now} Get siginal in Main!");mutex.WaitOne();Console.WriteLine($"{DateTime.Now} Get siginal in main!");Console.WriteLine($"{DateTime.Now} Result is {task.Result}");Console.ReadKey();}private static int ThreadFunction(){Console.WriteLine($"{DateTime.Now} Get siginal in ThreadFunction!");mutex.WaitOne(); //获取锁for (int i = 0; i <= 10; i++){sum += i;Thread.Sleep(1000);}Console.WriteLine($"{DateTime.Now} Release mutex in ThreadFunction!");mutex.ReleaseMutex(); //释放锁return sum;}}
运行结果：
三、总结
为避免发送多线程发生死锁，Mutex的WaitOne()和ReleaseMutex()需成对配合使用。
