Hallo Sebastian,
in EPICS osdMutex the semaphore is created like this:
sc = rtems_semaphore_create (rtems_build_name ('M', c3, c2, c1),
1,
RTEMS_PRIORITY|RTEMS_BINARY_SEMAPHORE|RTEMS_INHERIT_PRIORITY|RTEMS_NO_PRIORITY_CEILING|RTEMS_LOCAL,
0,
&sid);
if (sc != RTEMS_SUCCESSFUL) {
errlogPrintf ("Can't create mutex semaphore: %s\n", rtems_status_text
(sc));
return NULL;
}
The implementation:
https://github.com/epics-base/epics-base/blob/7.0/modules/libcom/src/osi/os/RTEMS-score/osdMutex.c
Viele Grüße und Danke
Heinz
> On 28. Sep 2021, at 12:02, Sebastian Huber
> <sebastian.hu...@embedded-brains.de> wrote:
>
> On 28/09/2021 11:46, Heinz Junkes wrote:
>> Unfortunately we found out that EPICS uses the mutex handling also in the
>> interrupt context
>> and this leads to core-dumps in RTEMS :-(
>
> Yes, using any kind of mutexes in interrupt context is undefined behaviour.
> Mutexes may only be used from threads.
>
> Which RTEMS semaphore classes do you use in EPICS and in particular which
> classes do you use in interrupt context?
>
> --
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