From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: "Fernando Herrero Carrón" <elferdo@domain.hid>
Cc: Xenomai-help@domain.hid
Subject: Re: [Xenomai-help] rt_task_wait_period returns an undocumented value
Date: Fri, 21 Oct 2011 18:15:25 +0200 [thread overview]
Message-ID: <4EA19A9D.1080502@domain.hid> (raw)
In-Reply-To: <CAMwkeZxmX1dU-5d2zDiYqv_SRcFqyDF+gmp+i8t=q1G6NXrmbg@domain.hid>
On 10/21/2011 06:04 PM, Fernando Herrero Carrón wrote:
> Dear list,
>
> I am running xenomai-2.6-rc4 on an amd64 linux kernel version 2.6.38.8.
>
> I am setting up a periodic task using
>
> rt_task_set_periodic(NULL, TM_NOW, 11500);
>
> For period values smaller than 11450 I get an EINVAL return value. I've got
> one question regarding this, and it's how is this threshold calculated?
See:
http://www.xenomai.org/documentation/trunk/html/api/group__pod.html#gaed5776a428e7c59b52b1da76f0d765fa
>
> However, further down the program, supposing rt_task_set_periodic() failed
> with the above result, calling
>
> rt_task_wait_period()
>
> will return EAGAIN, which is not documented in
> http://www.xenomai.org/documentation/trunk/html/api/group__task.html#ga1645d3a072ef3cefeed3bcbb27dcf108
> .
That is because glibc choose to have EWOULDBLOCK == EAGAIN. And
EWOULDBLOCK is documented.
--
Gilles.
next prev parent reply other threads:[~2011-10-21 16:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 16:04 [Xenomai-help] rt_task_wait_period returns an undocumented value Fernando Herrero Carrón
2011-10-21 16:15 ` Gilles Chanteperdrix [this message]
2011-10-21 17:37 ` Fernando Herrero Carrón
2011-10-21 17:47 ` Gilles Chanteperdrix
2011-10-21 18:08 ` Fernando Herrero Carrón
2011-10-21 18:47 ` Gilles Chanteperdrix
2011-10-21 19:01 ` Fernando Herrero Carrón
2011-10-21 19:07 ` Gilles Chanteperdrix
2011-10-21 19:15 ` Fernando Herrero Carrón
2011-10-21 20:11 ` Daniele Nicolodi
2011-10-21 20:27 ` Fernando Herrero Carrón
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