Problem using rt_sem_wait

[Thomas, Finny C CTR USAF AFRL/SNRN]

Out of curiosity, what are your compile options? 

I noticed that I got a lot of null pointers when I compiled with "-O3";
"-O2" was as optimized as I could go. 

F. Thomas


> -----Original Message-----
> From: rtai-admin at rtai.org [mailto:rtai-admin at rtai.org] On Behalf Of Jorge
> Almeida
> Sent: Monday, January 23, 2006 9:37 AM
> To: rtai at rtai.org
> Cc: Hannes Mayer; Suessmilch Bernd
> Subject: Re: Problem using rt_sem_wait
> 
> 
> 
> No my task pointer is not NULL.
> I've already check that several times.
> Even in the place where i call the rt_sem_wait.
> 
> With this constructor:
> 
> Debug::Debug(): QThread(),
> 	m_psTask(NULL)
> {
> 
>     //initializes the task for this thread
>     if(m_psTask == NULL){
>         m_psTask = rt_task_init(rt_get_name(0),0,0,0);
>     }
>    printf("Debug task pointer = %p\n",m_psTask);
>    fflush(stdout);
> }
> 
> I get for the task pointer the following result:
> 
> "Debug task pointer = 0xe123f220"
> 
> the function "rt_get_name(0)" permits obtaining a name that isn't
> registered
> in the RTAI Domain. This is usefull while the program is in fase of debug
> because if it crashs we do not need to make a reboot to the computer to
> use
> the same name. If the program crashs the name is not deleted from the RTAI
> names.
> 
> Thanks
> 
> 
> 
> Em Monday 23 January 2006 14:19, o Hannes Mayer escreveu:
> > Jorge Almeida wrote:
> > > Yes.
> > > I'm using C++ and i call rt_task_init in the class constructor.
> > >
> > >
> > > Debug::Debug(): QThread(),
> > > 	m_psTask(NULL)
> > > {
> > >
> > >     //initializes the task for this thread
> > >     if(m_psTask == NULL){
> > >         m_psTask = rt_task_init(rt_get_name(0),0,0,0);
> > >     }
> > > }
> >
> > Dunno if that is related to your problem, but I always use
> > nam2num() to provide the task name e.g. nam2num("MAIN").
> >  From the docs: rt_get_name: Get an object name by its address
> > Do you check m_psTask after rt_task_init ?
> > I bet it's NULL.
> >
> > Best regards,
> > Hannes.
> 
> --
> Jorge Almeida
> j-almeida at criticalsoftware.com
> 
> 
> 
> DISCLAIMER: This message may contain confidential information or
> privileged material and is intended only for the individual(s) named. If
> you are not a named addressee and mistakenly received this message you
> should not copy or otherwise disseminate it: please delete this e-mail
> from your system and notify the sender immediately. E-mail transmissions
> are not guaranteed to be secure or error-free as information could be
> intercepted, corrupted, lost, destroyed, arrive late or incomplete or
> contain viruses. Therefore, the sender does not accept liability for any
> errors or omissions in the contents of this message that arise as a result
> of e-mail transmissions. Please request a hard copy version if
> verification is required. Critical Software.
>