From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4374A5D4.3070006@domain.hid>
Date: Fri, 11 Nov 2005 15:08:20 +0100
From: Jan Kiszka <kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] Creation of a rt-queue from the user space
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To: ROSSIER Daniel <Daniel.Rossier@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

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ROSSIER Daniel wrote:
> Hello everyone,
>=20
> I've recently posted a message in this mailing list about an issue rega=
rding the use of realtime queue in xenomai from the user space.=20
>=20
> I didn't make any significant progress regarding this issue. I've upgra=
ded to linux 2.6.12; everything works in the user/kernel space except the=
 queue. If I correctly understood, it's necessary to have a /dev/rtheap i=
n order to set up a shared memory segment between user and kernel space. =

> If this entry does not exist, we get an error at the queue creation tim=
e.=20
>=20
> I've observed that if I'm creating manually the entry in /dev, I get th=
e same error and the entry disappears from /dev. Then, I've transfered th=
e udev/rtheap.rules located in the xenomai/nucleus directory into /etc/ud=
ev/rules.d. But the system totally freezes after xeno-load.
>=20
> I've put the segment of code (very simple) for the creation of a simple=
 rt-queue.
>=20
> ----------------
>=20
> int main(int argc, char *argv[]) {
>=20
>   printf("Now starting: %s\n", argv[0]);
>=20
>   /* Timer initialization */
>   err =3D rt_timer_start(1000000);   /* So, one tick will be equal to 1=
 ms */
>   if (err !=3D 0) {
>     printf("Error timer: %d\n", err);
>     clean_exit(0);
>   }
>=20
>   /* Create the mailbox */
>   err =3D rt_queue_create(&mailbox, "MAILBOX", 80, 1, Q_FIFO);
>   if (err !=3D 0) {
>     printf("mbox creation failed: %d\n", err);
>     clean_exit(0);
>   }
>=20
> ------------
>=20
> Thanks for any support.
>=20
> Regards
> Daniel
>=20

Everything's fine here with your test on 2.6.13.4-ipipe-1.0.09 + Xenomai
SVN + /dev/rtheap. Moreover, I don't see a reason why your manually
created device node should disappear. Maybe your build is inconsistent
in some subtle way.

Jan


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