C#多线程同步事件及等待句柄
最近捣鼓了一下多线程的同步问题,发现其实C#关于多线程同步事件处理还是很灵活,这里主要写一下,自己测试的一些代码,涉及到了AutoResetEvent 和 ManualResetEvent,当然还有也简要提了一下System.Threading.WaitHandle.WaitOne 、System.Threading.WaitHandle.WaitAny和System.Threading.WaitHandle.WaitAll ,下面我们一最初学者的角度来看,多线程之间的同步。
假设有这样的一个场景,主线程开了一个子线程,让子线程等着,等主线程完成了某件事情时再通知子线程去往下执行,这里关键就在于这个怎让子线程等着,主线程怎通知子线程,一般情况下我们不难想到用一个公共变量,于是咱们就有了下面的代码:
using System;using System.Collections.Generic;using System.Text;using System.Threading;namespace AutoResetEventTest{ class Program { const int numIterations = 10; static AutoResetEvent myResetEvent = new AutoResetEvent(false); static AutoResetEvent ChangeEvent = new AutoResetEvent(false); //static ManualResetEvent myResetEvent = new ManualResetEvent(false); //static ManualResetEvent ChangeEvent = new ManualResetEvent(false); static int number; //这是关键资源 static void Main() { Thread payMoneyThread = new Thread(new ThreadStart(PayMoneyProc)); payMoneyThread.Name = "付钱线程"; Thread getBookThread = new Thread(new ThreadStart(GetBookProc)); getBookThread.Name = "取书线程"; payMoneyThread.Start(); getBookThread.Start(); for (int i = 1; i <= numIterations; i++) { Console.WriteLine("买书线程:数量{0}", i); number = i; //Signal that a value has been written. myResetEvent.Set(); //ChangeEvent.Set(); Thread.Sleep(10); } payMoneyThread.Abort(); getBookThread.Abort(); } static void PayMoneyProc() { while (true) { myResetEvent.WaitOne(); //myResetEvent.Reset(); Console.WriteLine("{0}:数量{1}", Thread.CurrentThread.Name, number); ChangeEvent.Set(); } } static void GetBookProc() { while (true) { ChangeEvent.WaitOne(); //ChangeEvent.Reset(); Console.WriteLine("{0}:数量{1}", Thread.CurrentThread.Name, number); Console.WriteLine("------------------------------------------"); //Thread.Sleep(0); } } }}
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相关链接:http://www.cnblogs.com/freshman0216/archive/2008/07/30/1252345.html
http://msdn.microsoft.com/zh-cn/library/z6w25xa6%28VS.80%29.aspx