以下是通过C#编写的控制台程序，具体是在线程间调用互斥锁。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//use the mutex and thread
using System.Threading;
namespace UseMytex
{
class Program
{
// Create a new Mutex. The creating thread does not own the mutex.
private static Mutex mut = new Mutex(false, "mutes1"); //false : Mutex未被占有
private const int numIterations = 1; //循环调用函数的次数
private const int numThreads = 3; //3个线程
static void Main(string[] args)
{
// Create the threads that will use the protected resource.
for (int i = 0; i < numThreads; i++)
{
Thread newThread = new Thread(new ThreadStart(ThreadProc));
newThread.Name = String.Format("Thread{0}", i + 1);
newThread.Start();
}
// The main thread exits, but the application continues to
// run until all foreground threads have exited.
Console.ReadLine();
}
private static void ThreadProc()
{
for (int i = 0; i < numIterations; i++)
{
UseResource();
}
}
// This method represents a resource that must be synchronized
// so that only one thread at a time can enter.
private static void UseResource()
{
// Wait until it is safe to enter, and do not enter if the request times out.
Console.WriteLine("{0} is requesting the mutex", Thread.CurrentThread.Name); //得到当前正在请求的线程名称
if (mut.WaitOne())
{
Console.WriteLine("{0} has entered the protected area",
Thread.CurrentThread.Name); //得到当前请求成功的线程名称
// Place code to access non-reentrant resources here.
// Simulate some work.
Thread.Sleep(5000);
Console.WriteLine("{0} is leaving the protected area",
Thread.CurrentThread.Name);
// Release the Mutex.
mut.ReleaseMutex(); //释放当前得到的互斥量
Console.WriteLine("{0} has released the mutex",
Thread.CurrentThread.Name);
}
else
{
Console.WriteLine("{0} will not acquire the mutex",
Thread.CurrentThread.Name);
}
}
}
}
在关闭程序时，除了关闭线程 Thread.Abort(),
还需要将互斥锁进行释放 mutex.ReleaseMutex();
结果如下图所示：
