Re: pthread_mutex_timedlock() vs. clock_settime()

["Joël Krähemann" <jkraehemann@gmail.com>]

Hi,

pthread_mutex_t mtx of struct test_context.

You lock it in line 503 first, then you call test_timeout_finite(),
which calls event_post() in run() second lock.

cheers,
Joël

On Mon, Aug 1, 2022 at 9:52 AM Sebastian Huber
<sebastian.huber@embedded-brains.de> wrote:
>
> Hello Joël,
>
> On 01/08/2022 09:10, Joël Krähemann wrote:
> > Hi Sebastian,
> >
> > You have a dead-lock, probably. I just looked at your code. You are
> > using non-recursive mutices and I think this mutex was locked twice by
> > the very same thread.
>
> thanks for having a look at the test case. Sorry for being so blind, but
> which mutex is where in the code locked twice by the same thread?
>
> If I omit the mutex test case by starting with ACTION_CND_WAIT:
>
>    for (action = ACTION_CND_WAIT; action < ACTION_TERMINATE; ++action) {
>      event_post(&ctx->action, action);
>
> Then the test runs fine:
>
> *** timeout finite ***
> pthread_cond_timedwait
> wake up
> pthread_cond_timedwait: actual 'Connection timed out', expected
> 'Connection timed out'
> pthread_rwlock_timedrdlock
> wake up
> pthread_rwlock_timedrdlock: actual 'Connection timed out', expected
> 'Connection timed out'
> pthread_rwlock_timedwrlock
> wake up
> pthread_rwlock_timedwrlock: actual 'Connection timed out', expected
> 'Connection timed out'
> sem_timedwait
> wake up
> sem_timedwait: actual 'Connection timed out', expected 'Connection timed
> out'
> mq_send
> mq_timedsend
> wake up
> mq_timedsend: actual 'Connection timed out', expected 'Connection timed out'
> mq_receive
> mq_timedreceive
> wake up
> mq_timedreceive: actual 'Connection timed out', expected 'Connection
> timed out'
> clock_nanosleep
> wake up
> clock_nanosleep: actual 'Success', expected 'Success'
>
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