1 using System;
2 using System.Threading;
3
4 public class Example
5 {
6 // mre is used to block and release threads manually. It is
7 // created in the unsignaled state.
8 private static ManualResetEvent mre = new ManualResetEvent(false);
9
10 static void Main()
11 {
12 Console.WriteLine("\nStart 3 named threads that block on a ManualResetEvent:\n");
13
14 for(int i = 0; i <= 2; i++)
15 {
16 Thread t = new Thread(ThreadProc);
17 t.Name = "Thread_" + i;
18 t.Start();
19 }
20
21 Thread.Sleep(500);
22 Console.WriteLine("\nWhen all three threads have started, press Enter to call Set()" +
23 "\nto release all the threads.\n");
24 Console.ReadLine();
25
26 mre.Set();
27
28 Thread.Sleep(500);
29 Console.WriteLine("\nWhen a ManualResetEvent is signaled, threads that call WaitOne()" +
30 "\ndo not block. Press Enter to show this.\n");
31 Console.ReadLine();
32
33 for(int i = 3; i <= 4; i++)
34 {
35 Thread t = new Thread(ThreadProc);
36 t.Name = "Thread_" + i;
37 t.Start();
38 }
39
40 Thread.Sleep(500);
41 Console.WriteLine("\nPress Enter to call Reset(), so that threads once again block" +
42 "\nwhen they call WaitOne().\n");
43 Console.ReadLine();
44
45 mre.Reset();
46
47 // Start a thread that waits on the ManualResetEvent.
48 Thread t5 = new Thread(ThreadProc);
49 t5.Name = "Thread_5";
50 t5.Start();
51
52 Thread.Sleep(500);
53 Console.WriteLine("\nPress Enter to call Set() and conclude the demo.");
54 Console.ReadLine();
55
56 mre.Set();
57
58 // If you run this example in Visual Studio, uncomment the following line:
59 //Console.ReadLine();
60 }
61
62
63 private static void ThreadProc()
64 {
65 string name = Thread.CurrentThread.Name;
66
67 Console.WriteLine(name + " starts and calls mre.WaitOne()");
68
69 mre.WaitOne();
70
71 Console.WriteLine(name + " ends.");
72 }
73 }
74
75 /* This example produces output similar to the following:
76
77 Start 3 named threads that block on a ManualResetEvent:
78
79 Thread_0 starts and calls mre.WaitOne()
80 Thread_1 starts and calls mre.WaitOne()
81 Thread_2 starts and calls mre.WaitOne()
82
83 When all three threads have started, press Enter to call Set()
84 to release all the threads.
85
86
87 Thread_2 ends.
88 Thread_0 ends.
89 Thread_1 ends.
90
91 When a ManualResetEvent is signaled, threads that call WaitOne()
92 do not block. Press Enter to show this.
93
94
95 Thread_3 starts and calls mre.WaitOne()
96 Thread_3 ends.
97 Thread_4 starts and calls mre.WaitOne()
98 Thread_4 ends.
99
100 Press Enter to call Reset(), so that threads once again block
101 when they call WaitOne().
102
103
104 Thread_5 starts and calls mre.WaitOne()
105
106 Press Enter to call Set() and conclude the demo.
107
108 Thread_5 ends.
109 */
原文来自:http://msdn.microsoft.com/zh-cn/library/system.threading.manualresetevent(v=vs.110).aspx?cs-save-lang=1&cs-lang=csharp#code-snippet-1
