Question

islem = new Thread(new ThreadStart(ilk));
         islem2 = new Thread(new ThreadStart(ikinci));
         islem3 = new Thread(new ThreadStart(ucuncu));
         islem4 = new Thread(new ThreadStart(dorduncu));
         islem.Start();
         islem2.Start();
         islem3.Start();
         islem4.Start();



        if (!islem.IsAlive)
        {
            islem2.Suspend();
            islem3.Suspend();
            islem4.Suspend();
        }

我想在islem完成时做。其他线程暂停，但它不起作用我读到了ManualResetEvent，但我无法弄清楚多线程的例子。他们只使用一个简单的线程。此外，我还阅读了http://www.albahari.com/threading/part4.aspx#_Suspending_and_Resuming本文，并查看了类似C# controlling threads (resume/suspend) How to pause/suspend a thread then continue it? Pause/Resume thread whith AutoResetEvent的类似问题我正在使用多线程对象

Answer 1

如果您只需要取消工作线程，最简单的方法是使用标志。您必须标记标志volatile以确保所有线程都使用相同的副本。

private volatile bool _done = false;

void Main()
{
    StartWorkerThreads();
}

void WorkerThread()
{
    while (true)
    {
        if (_done) return; //Someone else solved the problem, so exit.
        ContinueSolvingTheProblem();
    }
    _done = true; //Tell everyone else to stop working.
}

如果你真的想暂停（我不确定为什么）你可以使用ManualResetEvent。这允许阻塞行为而不消耗暂停线程的资源。

//When signalled, indicates threads can proceed.
//When reset, threads should pause as soon as possible.
//Constructor argument = true so it is set by default
private ManualResetEvent _go = new ManualResetEvent(true);

void Main()
{
    StartWorkerThreads();
}

void WorkerThread()
{
    while (true)
    {
        _go.WaitOne();  //Pause if the go event has been reset
        ContinueSolvingTheProblem();
    }
    _go.Reset();  //Reset the go event in order to pause the other threads
}

您还可以合并这些方法，例如：如果你想能够暂停线程，做更多的工作，然后取消它们：

private volatile bool _done = false;
private ManualResetEvent _go = new ManualResetEvent(true);

void Main()
{
    StartWorkerThreads();
}

void WorkerThread()
{
    while (true)
    {
        if (_done) return; //Exit if problem has been solved
        _go.WaitOne();  //Pause if the go event has been reset
        if (_done) return; //Exit if problem was solved while we were waiting
        ContinueSolvingTheProblem();
    }
    _go.Reset();  //Reset the go event in order to pause the other threads
    if (VerifyAnswer())
    {
        _done = true; //Set the done flag to indicate all threads should exit
    }
    else
    {
        _go.Set(); //Tell other threads to continue
    }
}

一个线程完成后的多线程并挂起其他线程

1 个答案: