浅尝DesignPattern_Singleton

最新推荐文章于 2024-03-18 19:36:19 发布

转载最新推荐文章于 2024-03-18 19:36:19 发布 · 81 阅读

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原文链接：http://www.cnblogs.com/TivonStone/archive/2010/04/19/1715077.html

本文详细介绍了使用C#实现Singleton模式的方法，通过双重检查锁定确保线程安全的同时，也提供了延迟实例化的机制。该实现利用了静态构造函数和锁对象来创建一个单一实例。

Singleton

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UML:

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SAMPLE:

1 class SingletonClient
2 {
3 static void Main(string[] args)
4 {
5 Singleton singleton = Singleton.getInstance();
6 singleton.SaySomething();
7
8 // Wait for user
9 Console.ReadKey();
10 }
11 }
12
13 #region Singleton
14
15 public class Singleton
16 {
17 private volatile static Singleton _uniqueInstance;
18 private static readonly object _syncLock = new object();
19
20 private Singleton() {}
21
22 public static Singleton getInstance()
23 {
24 if (_uniqueInstance == null)
25 {
26 // Lock area where instance is created
27 lock(_syncLock)
28 {
29 if (_uniqueInstance == null)
30 {
31 _uniqueInstance = new Singleton();
32 }
33 }
34 }
35 return _uniqueInstance;
36 }
37
38 public void SaySomething()
39 {
40 Console.WriteLine("I am double checked, therefore I am");
41 }
42 }

转载于:https://www.cnblogs.com/TivonStone/archive/2010/04/19/1715077.html