C# 多线程同步(Mutex

C# 多线程同步(Mutex | Semaphore)

Mutex: 用于保护临界区，确保同一时间只有一个线程能够访问共享资源；
Semaphore: 允许同时有多个线程访问共享资源，但会限制并发访问的数量。

Mutex运行输出

Semaphore运行输出

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namespace SyncThreadDemo
{internal class Program{static string strlock = "Semaphore";// Mutex | Semaphorestatic Mutex mutex = new Mutex();static Semaphore semaphore = new Semaphore(2, 2); // 允许同时有两个线程访问static void Main(string[] args){ Thread[] threads = new Thread[3];for (int i = 0; i < 3; i++) { threads[i] = new Thread(new ThreadStart(ThreadMethod)); threads[i].Name = "Thread-" + (i + 1); }for (int i = 0; i < 3; i++) { threads[i].Start(); }Console.ReadKey();}static void ThreadMethod(){Console.WriteLine($"{Thread.CurrentThread.Name} is waiting");// 锁住switch (strlock){case "Mutex": mutex.WaitOne(); break;case "Semaphore": semaphore.WaitOne(); break;}try{Console.WriteLine($"{Thread.CurrentThread.Name} has acquired");Thread.Sleep(100);// 模拟执行动作}finally{Console.WriteLine($"{Thread.CurrentThread.Name} is releasing"); // 解锁switch (strlock){case "Mutex": mutex.ReleaseMutex(); break;case "Semaphore": semaphore.Release(); break;}}} }
}

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