C#中的volatile关键字

class VolatileTest
{public volatile int i;public void Test(int _i){i &＃61; _i;}
}

using System;
using System.Threading;public class Worker
{// This method is 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 &＃61; true;}// Keyword volatile is used as a hint to the compiler that this data// member is accessed by multiple threads.private volatile bool _shouldStop;
}public class WorkerThreadExample
{static void Main(){// Create the worker thread object. This does not start the thread.Worker workerObject &＃61; new Worker();Thread workerThread &＃61; new Thread(workerObject.DoWork);// Start the worker thread.
workerThread.Start();Console.WriteLine("Main thread: starting worker thread...");// Loop until the 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 Thread.Join method to block the current thread // until the object&＃39;s thread terminates.
workerThread.Join();Console.WriteLine("Main thread: worker thread has terminated.");}// Sample output:// Main thread: starting worker thread...// 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.
}