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        如何可靠地判断 boost 线程是否已退出其 run 方法?

        时间:2023-07-20

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                  本文介绍了如何可靠地判断 boost 线程是否已退出其 run 方法?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我认为 joinable 会表明这一点,但是,情况似乎并非如此.

                  I assumed joinable would indicate this, however, it does not seem to be the case.

                  在一个工人类中,我试图表明它仍在通过谓词处理:

                  In a worker class, I was trying to indicate that it was still processing through a predicate:

                  bool isRunning(){return thread_->joinable();}
                  

                  一个已经退出的线程不是不能加入吗?我错过了什么...... boost thread::joinable 是什么意思?

                  Wouldn't a thread that has exited not be joinable? What am I missing... what is the meaning of boost thread::joinable?

                  推荐答案

                  由于您可以在线程终止后加入,所以 joinable() 仍然会返回 true,直到您调用 join() 或 detach().如果您想知道某个线程是否仍在运行,您应该能够调用 timed_join,等待时间为 0.请注意,这可能会导致竞争条件,因为线程可能会在调用后立即终止.

                  Since you can join a thread even after it has terminated, joinable() will still return true until you call join() or detach(). If you want to know if a thread is still running, you should be able to call timed_join with a wait time of 0. Note that this can result in a race condition since the thread may terminate right after the call.

                  这篇关于如何可靠地判断 boost 线程是否已退出其 run 方法?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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