Re: [Xenomai-help] pthread_mutex_lock returns 1

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Landau, Bracha wrote:
> Thanks for your help.
> 
> I tried to put in "printk"s in the kernel implementation of the
> xenomai pthread_mutex_lock, and it did not work. Neither did
> xnprintf. I did this in order to find out what is the exact cause of
> the error; generally adding printk's in the kernel implementation of
> functions did work, but on this one it didn't.

That is because the implementation of the pthread_mutex_lock service is
in ksrc/skins/posix/syscall.c, and calls pse51_mutex_timedlock_break in
ksrc/skins/posix/mutex.c, pthread_mutex_lock implementation in
ksrc/skins/posix/mutex.c is only for kernel-space users. We had to split
this for correct handling of Linux signals.

> 
> Is there any way to discern what exactly the problem is? This code
> was working on earlier versions of Xenomai (2.2) and did not generate
> an error on this instance of calling pthread_mutex_lock.

Ok, I have checked, 2.2 already had the pshared attribute, so I think
your issue is the other one (calling phtread_mutex services from non
real-time threads). Or maybe some other undocumented reason, which you
should find by adding printks... :-)


> This e-mail is confidential, the property of NDS Ltd and intended for
> the addressee only. Any dissemination, copying or distribution of
> this message or any attachments by anyone other than the intended
> recipient is strictly prohibited.

Did I tell you that I found these footers stupid?

-- 
                                          Gilles