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  • .net 4.0新特性延迟初始化:Lazy(转),ThreadLocal<T>

    感谢作者
    http://www.cnblogs.com/anytao/archive/2009/10/29/must_net_33.html

    http://www.cnblogs.com/me-sa/archive/2010/05/25/lazy-initialization-fx4.html

    .net也有ThreadLocal了

    http://www.cnblogs.com/tmrcp/archive/2009/07/17/1525506.html

    .net 4.0之前用ThreadStatic标签代替

    http://msdn.microsoft.com/en-us/library/dd997286(v=VS.100).aspx

    补充

    1. ThreadStatic的使用情况

    代码
        public class Demo7
        {
            
    static int count=100000;
            
    public Demo7()
            {
                ThreadPool.QueueUserWorkItem(
    new WaitCallback(Task1));
                ThreadPool.QueueUserWorkItem(
    new WaitCallback(Task2));
            }

            
    public void Task1(object obj)
            {
                
    for (int i = 0; i < 100000; i++)
                {
                    count
    ++;
                }

                Console.WriteLine(DateTime.Now);
                Console.WriteLine(
    "Task1 count {0}", count);
            }

            
    public void Task2(object obj)
            {
                
    for (int i = 0; i < 100000; i++)
                {
                    count
    ++;
                }
                Console.WriteLine(
    "Task2 count {0}", count);
            }
        }

     显示效果 

     

    显示为乱数,其实不准的

    2.使用了 ThreadStatic以后的结果


     

     即该变量已经成为线程的局部变量,初始化的值也重置了

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  • 原文地址:https://www.cnblogs.com/Clingingboy/p/1755146.html
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