C# 特性之volatile

class VolatileTest
{
    public volatile int sharedStorage;

    public void Test(int _i)
    {
        sharedStorage = _i;
    }
}

 1 public class Worker
 2 {
 3     // This method is called when the thread is started.
 4     public void DoWork()
 5     {
 6         bool work = false;
 7         while (!_shouldStop)
 8         {
 9             work = !work; // simulate some work
10         }
11         Console.WriteLine("Worker thread: terminating gracefully.");
12     }
13     public void RequestStop()
14     {
15         _shouldStop = true;
16     }
17     // Keyword volatile is used as a hint to the compiler that this data
18     // member is accessed by multiple threads.
19     private volatile bool _shouldStop;
20 }
21 
22 public class WorkerThreadExample
23 {
24     public static void Main()
25     {
26         // Create the worker thread object. This does not start the thread.
27         Worker workerObject = new Worker();
28         Thread workerThread = new Thread(workerObject.DoWork);
29 
30         // Start the worker thread.
31         workerThread.Start();
32         Console.WriteLine("Main thread: starting worker thread...");
33 
34         // Loop until the worker thread activates.
35         while (!workerThread.IsAlive)
36             ;
37 
38         // Put the main thread to sleep for 500 milliseconds to
39         // allow the worker thread to do some work.
40         Thread.Sleep(500);
41 
42         // Request that the worker thread stop itself.
43         workerObject.RequestStop();
44 
45         // Use the Thread.Join method to block the current thread 
46         // until the object‘s thread terminates.
47         workerThread.Join();
48         Console.WriteLine("Main thread: worker thread has terminated.");
49     }
50     // Sample output:
51     // Main thread: starting worker thread...
52     // Worker thread: terminating gracefully.
53     // Main thread: worker thread has terminated.
54 }