POSIX timers misbehaviour

[Sebastian Huber]

On 17/12/14 09:55, Daniel Krüger wrote:
> I am porting the openPOWERLINK stack (Industrial Ethernet protocol 
> implementation) to RTEMS. Because RTEMS includes the POSIX layer, I 
> tried to reuse most of the Linux implementation of openPOWERLINK.
> When it came to the timers, I discovered some differences of the POSIX 
> timer behaviour in RTEMS in respect to Linux. I don't know what the 
> POSIX standard says in that regard.

POSIX is pretty clear in this regard:

http://pubs.opengroup.org/onlinepubs/009695399/functions/timer_create.html

It is a per-process timer, so the current RTEMS implementation is not 
conformant with the POSIX requirements.  The question is whether this is 
a bug or a feature.  If we change the behaviour then we may break 
existing RTEMS applications.  I am in favour of enforcing POSIX strictly.

Can you please open a ticket:

https://devel.rtems.org/newticket

-- 
Sebastian Huber, embedded brains GmbH

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