Thread.Join 在多个线程上超时 [英] Thread.Join on multiple threads with timeout

问题描述

我有一个线程数组，我想在超时的情况下将它们全部加入(即查看它们是否都在某个超时内完成).我正在寻找等效于 WaitForMultipleObjects 的东西或将线程句柄传递到 WaitHandle.WaitAll 的方法，但我似乎无法在 BCL 中找到任何我想要的东西.

I have an array of threads, and I want to Join them all with a timeout (i.e. see if they have all finished within a certain timeout). I'm looking for something equivalent to WaitForMultipleObjects or a way of passing the thread handles into WaitHandle.WaitAll, but I can't seem to find anything in the BCL that does what I want.

我当然可以遍历所有线程(见下文)，但这意味着整个函数可能需要 timeout *thread.Count 才能返回.

I can of course loop through all the threads (see below), but it means that the overall function could take timeout * threads.Count to return.

private Thread[] threads;

public bool HaveAllThreadsFinished(Timespan timeout)
{
     foreach (var thread in threads)
     {
        if (!thread.Join(timeout))
        {
            return false;
        }                
     }
     return true;
}

推荐答案

但是在这个循环中你可以减少超时值:

But within this loop you can decrease timeout value:

private Thread[] threads;

public bool HaveAllThreadsFinished(Timespan timeout)
{
     foreach (var thread in threads)
     {
        Stopwatch sw = Stopwatch.StartNew();
        if (!thread.Join(timeout))
        {
            return false;
        }
        sw.Stop();
        timeout -= Timespan.FromMiliseconds(sw.ElapsedMiliseconds);                
     }
     return true;
}

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