线程安全小练习

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 using System.Threading;
10 
11 namespace WindowsFormsApplication3
12 {
13     public partial class Form1 : Form
14     {
15         public Form1()
16         {
17             InitializeComponent();
18         }
19 
20         //lock只能锁定一个引用类型变量
21         private static object _lock = new object();
22         private void button1_Click(object sender, EventArgs e)
23         {
24             //new Thread(Done).Start();
25             //new Thread(Done).Start();
26             //new Thread(Done).Start();
27             //new Thread(Done).Start();
28 
29 
30             new Thread(Done1).Start();
31             new Thread(Done1).Start();
32             new Thread(Done1).Start();
33             new Thread(Done1).Start();
34 
35         }
36         void Done()
37         {
38             //lock只能锁定一个引用类型变量
39             lock (_lock)
40             {
41                 tasktest();
42             }
43         }
44         void Done1()
45         {
46             Monitor.Enter(_lock);
47             {
48                 tasktest();
49             }
50             Monitor.Exit(_lock);
51         }
52 
53 
54 
55         private void tasktest()
56         {
57             for (int i = 0; i < 5; i++)
58             {
59                 Thread.Sleep(1000);
60             }
61 
62             Console.WriteLine("test" + Thread.CurrentThread.ManagedThreadId);
63         }
64 
65    
66     }
67 }