Csharp/C Sharp by API/System.Threading/Semaphore
Semaphore.WaitOne()
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using System; using System.Threading;
class MyThread {
public Thread thrd; static Semaphore sem = new Semaphore(2, 2); public MyThread(string name) { thrd = new Thread(this.run); thrd.Name = name; thrd.Start(); } void run() { Console.WriteLine(thrd.Name + " is waiting for a permit."); sem.WaitOne(); Console.WriteLine(thrd.Name + " acquires a permit."); for(int i=0;i<10;i++) { Console.WriteLine(thrd.Name + " : " + i); Thread.Sleep(50); } Console.WriteLine(thrd.Name + " releases a permit."); sem.Release(); }
}
class MainClass {
public static void Main() { MyThread mt1 = new MyThread("Thread #1"); MyThread mt2 = new MyThread("Thread #2"); MyThread mt3 = new MyThread("Thread #3"); mt1.thrd.Join(); mt2.thrd.Join(); mt3.thrd.Join(); }
}
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