From: Philippe Gerum <rpm@xenomai.org>
To: Alessandro Pittaluga <xpit@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] rt_task_catch and rt_hook in user space?
Date: Fri, 17 Mar 2006 08:59:58 +0100 [thread overview]
Message-ID: <441A6C7E.5000603@domain.hid> (raw)
In-Reply-To: <200603162115.20077.xpit@domain.hid>
Alessandro Pittaluga wrote:
> Hi to everybody,
>
> Anyone knows why the rt_task_catch and rt_hook is not available in the native
> library?
These routines are registering user callouts the nucleus invokes from kernel
space, so we cannot make them available from user-space at the moment. Maybe this
situation will improve when asynchronous calls of user-space routines are made
available in the future, e.g. for dealing with real-time signals without resorting
to switching to Linux first.
>
> rt_task_catch seems to me the only clean way to define signal handlers on
> per-thread basis, but it is not included in the user space lib, although the
> doc states that the service should be available to user space tasks.
>
The doc is wrong regarding rt_task_catch(). Only rt_task_notify() is accessible
from user-space.
> The hooks (registered on context switch) are very useful to calculate number
> of switches, consumed cpu time and so on..
>
> Is there any plan to implement them in user space?
>
Yes; no ETA though.
>
> Many Thanks
>
> Alessandro
>
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
>
--
Philippe.
prev parent reply other threads:[~2006-03-17 7:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-16 20:15 [Xenomai-help] rt_task_catch and rt_hook in user space? Alessandro Pittaluga
2006-03-17 7:59 ` Philippe Gerum [this message]
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