[Xenomai-help] How to get pid in Xenomai?

[Xenomai-help] How to get pid in Xenomai?

[Hans Søndergaard (HSO)]

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Hello.
1) Can you tell me, how to get the task id for the current (running) rt_task?
I have tried to use getpid(), but this function always gives the same id as result.
I am running several periodic rt_tasks and need their id's.

2) In Xenomai the priority inheritance protocol is implemented.
Safety-Critical Java (http://jcp.org/en/jsr/detail?id=302) requires the priority ceiling emulation protocol.
Have you any plan to implement and include this protocol in Xenomai?

Regards
Hans Sondergaard




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Re: [Xenomai-help] How to get pid in Xenomai?

[Gilles Chanteperdrix]

Hans Søndergaard (HSO) wrote:
> Hello.
> 1) Can you tell me, how to get the task id for the current (running) rt_task?
> I have tried to use getpid(), but this function always gives the same id as result.
> I am running several periodic rt_tasks and need their id's.

You can use rt_task_self() or pthread_self(), they will return a unique
pointer for the task. If you would like the Linux pid of the task, you
can do what cyclictest does, i.e. issue the gettid syscall.

> 
> 2) In Xenomai the priority inheritance protocol is implemented.
> Safety-Critical Java (http://jcp.org/en/jsr/detail?id=302) requires the priority ceiling emulation protocol.
> Have you any plan to implement and include this protocol in Xenomai?

Not that I know of, but it may be easy enough to implement, so I guess
your patch would be welcome.

-- 
                                                 Gilles.