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Date: Thu, 10 Aug 2023 10:06:17 -0400
From: "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
To: qijinquan@...hong.com
Cc: musl@...ts.openwall.com
Subject: Re: pthread_cond_wait may has a error
Excerpts from 祁金全's message of August 10, 2023 2:22 am:
> Hi,
> In my demo, I create 3 threads, the first and the second thread are wait for the global pthread_cond with different pthread_mutex
https://pubs.opengroup.org/onlinepubs/7908799/xsh/pthread_cond_wait.html:
> The effect of using more than one mutex for concurrent
> pthread_cond_wait() or pthread_cond_timedwait() operations on the same
> condition variable is undefined
https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_cond_timedwait.html:
> When a thread waits on a condition variable, having specified a
> particular mutex to either the pthread_cond_timedwait() or the
> pthread_cond_wait() operation, a dynamic binding is formed between
> that mutex and condition variable that remains in effect as long as at
> least one thread is blocked on the condition variable. During this
> time, the effect of an attempt by any thread to wait on that condition
> variable using a different mutex is undefined.
Cheers,
Alex.
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