Re: Sleep while holding a mutex

[Philippe Gerum <rpm@xenomai.org>]

Russell Johnson <russell.johnson@kratosdefense.com> writes:

> [[S/MIME Signed Part:Undecided]]
> In one of my functions, I lock a mutex, call evl_timedwat_event(), and then unlock the mutex. Whenever I call the timedwait, I get an error from the EVL Core saying that there was a sleep while holding a mutex. I was following the example on [1]. I also noticed under a test at [2] that there is a comment saying to disable the T_WOLI mode on the thread because there will be a sleep during a mutex. The test appears to verify the timedwait
> call. So do I need to just ignore that error whenever I am using an EVL event? Or do I have something else going wrong potentially?
>
>  
>
> [1] https://evlproject.org/core/user-api/event/
>
> [2] https://source.denx.de/Xenomai/xenomai4/libevl/-/blob/next/tests/monitor-event.c#L40
>
>  
>
> Thanks,
>
>  
>
> Russell
>
> [[End of S/MIME Signed Part]]

The documentation is right, but the code is wrong. This patch fixes it:
https://source.denx.de/Xenomai/xenomai4/linux-evl/-/commit/1dc0d91aa3a5c2055fe8e492df0b229546d4f5da

The test suite was updated accordingly to check the right behavior:
https://source.denx.de/Xenomai/xenomai4/libevl/-/commit/1b30808a6b0095736c5e1059377e2cb07225e9f6

-- 
Philippe.