timer_create problem

[Joel Sherrill]

Aitor.Viana.Sanchez at esa.int wrote:
>
> I just have changed the value of sigev.sigev_notify to SIGEV_SIGNAL 
> (just to verify) and I got the same error.
>
At this point, I would have to recommend stepping into the
function with and seeing which condition is not met.

This is a good example of where a support contract comes
into play.  I could spent more time investigating your problem
then.  My 2nd guess is:

    if ( !evp->sigev_signo )
       rtems_set_errno_and_return_minus_one( EINVAL );

since I see a memset(0...) and no set of that field.

--joel
>
>
>
> rtems-users-bounces+aitor.viana.sanchez=esa.int at rtems.org wrote on 
> 13/06/2007 21:13:24:
>
> > Aitor.Viana.Sanchez at esa.int wrote:
> > >
> > > Hi all,
> > >
> > > i am having a look to the CANFestival v3.0 trying to port it to RTEMS.
> > > I get the code already running over RTEMS but I have a problem with
> > > the timer_create POSIX function.
> > >
> > > The main.c source code gets inside the RTEMS configuration which
> > > includes:
> > >
> > > ...
> > > #define CONFIGURE_MAXIMUM_TIMERS            10
> > > ...
> > >
> > > /** RTEMS Configuration */
> > > #define CONFIGURE_MAXIMUM_RTEMS_TIMERS CONFIGURE_MAXIMUM_TIMERS
> > > ...
> > >
> > > /** POSIX Configuration */
> > > #define CONFIGURE_MAXIMUM_POSIX_TIMERS         
>  CONFIGURE_MAXIMUM_TIMERS
> > > ...
> > >
> > > When I try to create a timer calling the timer_create routine:
> > >         ....
> > >
> > >         memset (&sigev, 0, sizeof (struct sigevent));
> > >         sigev.sigev_value.sival_int = 0;
> > >         sigev.sigev_notify = SIGEV_THREAD;
> > >         sigev.sigev_notify_attributes = NULL;
> > >         sigev.sigev_notify_function = timer_notify;
> > >
> > >         status = timer_create (CLOCK_REALTIME, &sigev, &timer);
> > >         if (status != 0)
> > >                            MSG_ERR(errno, strerror(errno), status);
> > >
> > >         .....
> > >
> > > i got an error which is quite weird. I got the errno = 22 which is
> > > "invalid argument", that means that the specified clockid
> > > (CLOCK_REALTIME) is not defined. Nevertheless, i tried to call the
> > > function clock_gettime, which also needs the clockid (CLOCK_REALTIME)
> > > as a parameter, and i got no problem at all.
> > >
> > > I am using RTEMS 4.6.5.
> > >
> > > Do you have any idea that could help me to solve this problem ?
> > >
> > Looking in cpukit/posix/src/ptimer1.c, I see other reasons for EINVAL:
>
> > if (evp != NULL) {
> > /* The structure has data */
> > if ( ( evp->sigev_notify != SIGEV_NONE ) &&
> > ( evp->sigev_notify != SIGEV_SIGNAL ) ) {
> > /* The value of the field sigev_notify is not valid */
> > rtems_set_errno_and_return_minus_one( EINVAL );
> > }
>
> > if ( !evp->sigev_signo )
> > rtems_set_errno_and_return_minus_one( EINVAL );
> >
> > if ( !is_valid_signo(evp->sigev_signo) )
> > rtems_set_errno_and_return_minus_one( EINVAL );
> > }
>
> >
> > It looks like SIGEV_THREAD is not currently supported.
>
> > If you need it, I would be happy to give you an estimate on
> > implementing it for you.
>
> > Thanks.
>
> > --joel
> > > Cheers
> > >
> > >
> > >
> > > -----------------------------
> > > Aitor Viana Sánchez
> > >
> > > ESA - European Space Technology Centre (ESTEC)
> > > TEC-EDD - Data Handling and Computing Section
> > > ESA/ESTEC P.O. Box 299 / 2200AG Noordwijk ZH, The Netherlands
> > > Tel (+31) 71 565 6727
> > > Email: aitor.viana.sanchez at esa.int
> > > 
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