From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Mon, 12 Mar 2007 17:02:06 +0100
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From: Jochen Behnke <JK.Behnke@domain.hid>
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Subject: [Xenomai-help] App with pthreads using rt_task_shadow locks up
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To: xenomai@xenomai.org

Hello,

I am currently porting software form a windows based control system to Xen=
omai. The application creates 3 realtime tasks which build the core of the=
 control unit. Up to this point everything worked fine. The next milestone=
 of this project is to integrate network communication using sockets and p=
threads with the control system. The implementation of my - let's call it =
"SimpleRPC" -  library uses sockets and pthreads. At runtime this library =
creates at least 3 pthreads (1 that listens for incoming connections, 1 th=
at performs socket I/O per connected client, 1 that executes the requested=
 functions). As the functions, that are called by the workerthread, use xe=
nomai mutexes to synchronize critical sections of code, the workerthread n=
eeds to be a realtime task scheduled by xenomai. So I use rt=5Ftask=5Fshadow, =
to "convert" the pthread into a xenomai realtime task. When this code is e=
xecuted, my application locks up and I have to restart the whole system. W=
hen I remove the rt=5Ftask=5Fshadow call everything is fine, except for the ca=
lls to rt=5Fmutex=5Flock that return an error code because the calling context=
 is not a realtime task.

I am using
Xenomai 2.2.3
Linux Kernel 2.6.17

What's wrong =3F
How can I debug this problem =3F

Any hint is appreciated.


Jochen


P.S.:
Is there an easy way to search the xenomai mail archives =3F At the moment I=
 walk through them more or less manually.




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