AutoResetEvent.WaitOne()

Posted on 2015-10-22 Edited on 2023-11-24 In 多工 Views: Disqus:

先前執行緒文章以有用到AutoResetEvent 類別裡的WaitOne方法，

但總覺得WaitOne方法似乎不是很好懂，故還是來了解一下其用法好了。

WaitOne方法主要有三種形式分別是，WaitOne()、WaitOne(Int32)、WaitOne(Int32,Boolean)，

WaitOne()之前已經用過了，所以來看WaitOne(Int32)如何使用

一、WaitOne(Int32)

using System;
using System.Threading;

namespace WaitOne
{
    class Program
    {
        static AutoResetEvent autoEvent = new AutoResetEvent(false);
        static void Main(string[] args)
        {

            Console.WriteLine("Main starting.");

            ThreadPool.QueueUserWorkItem(new WaitCallback(WorkMethod), autoEvent);

            // Wait for work method to signal.
            if (autoEvent.WaitOne(1000))
            {
                Console.WriteLine("Work method signaled.");
            }
            else
            {
                Console.WriteLine("Timed out waiting for work " + "method to signal.");
            }
            Console.WriteLine("Main ending.");
            Console.ReadKey();
        }

        static void WorkMethod(object stateInfo)
        {
            Console.WriteLine("Work starting.");

            // Simulate time spent working.
            Thread.Sleep(new Random().Next(100, 2000));

            // Signal that work is finished.
            Console.WriteLine("Work ending.");
            ((AutoResetEvent)stateInfo).Set();
        }
    }
}