1、该示例创建一个名为Worker的类，该类包含辅助线程将执行的方法DoWork。这实际上是辅助线程的Main函数。辅助线程将通过调用此方法来开始执行，并在此方法返回时自动终止。public void DoWork(){ while (!_shouldStop) { Console.WriteLine("worker thread: working..."); } Console.WriteLine("worker thread: terminating gracefully.");}
2、Worker 类包含另一个方法，该方法用于通知 DoWork 它应当返回。此方法名为 RequestStop，如下所示：public void RequestStop(){ _shouldStop = true;}
3、RequestStop 方法只是将 true 赋给 _shouldStop 数据成员。由于此数据成员由 DoWork 方法来检查，因此这会间接导致 DoWork 返回，从而终止辅助线程。但是，您应当注意：DoWork 和 RequestStop 将由不同线程执行。DoWork 由辅助线程执行，而 RequestStop 由主线程执行，因此 _shouldStop 数据成员声明为 volatile，如下所示：private volatile bool _shouldStop;
4、此时，只有执行 Main 的主线程还存在。它会显示一条最终消息，然后返回，蒉翟蛳庹从而使主线程也终止。下面是完整的示例。using S烤恤鹇灭ystem;using System.Threading;public class Worker{ // This method will be called when the thread is started. public void DoWork() { while (!_shouldStop) { Console.WriteLine("worker thread: working..."); } Console.WriteLine("worker thread: terminating gracefully."); } public void RequestStop() { _shouldStop = true; } // Volatile is used as hint to the compiler that this data // member will be accessed by multiple threads. private volatile bool _shouldStop;}public class WorkerThreadExample{ static void Main() { // Create the thread object. This does not start the thread. Worker workerObject = new Worker(); Thread workerThread = new Thread(workerObject.DoWork); // Start the worker thread. workerThread.Start(); Console.WriteLine("main thread: Starting worker thread..."); // Loop until worker thread activates. while (!workerThread.IsAlive); // Put the main thread to sleep for 1 millisecond to // allow the worker thread to do some work: Thread.Sleep(1); // Request that the worker thread stop itself: workerObject.RequestStop(); // Use the Join method to block the current thread // until the object's thread terminates. workerThread.Join(); Console.WriteLine("main thread: Worker thread has terminated."); }}
5、输出如下：main thread: starting worker th筠续师诈read...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: working...worker thread: terminating gracefully...main thread: worker thread has terminated
