timer_settime doesn't fill siginfo_t

[Marek Prochazka]

It seems to me that RTEMS implementation of POSIX timers just does not
pass the sigev_value data structure at all. It saves the value in the
timer_create():

ptimer1.c: 
        if ( evp != NULL ) {
           timer_struct[timer_pos].inf.sigev_notify = evp->sigev_notify;
           timer_struct[timer_pos].inf.sigev_signo  = evp->sigev_signo;
           timer_struct[timer_pos].inf.sigev_value  = evp->sigev_value;
        }

But in FIRE_TIMER_S(), which is the function called when a timer
expires, pthread_kill() is used and this obviously only passes signal
number and not other values which should be passed (e.g. si_code ==
SI_TIMER, and also the sigev_value).

A question for RTEMS experts is whether this could be fixed somehow.

Marek


> -----Original Message-----
> From: 
> rtems-users-bounces+marek.prochazka=scisys.co.uk at rtems.org 
> [mailto:rtems-users-bounces+marek.prochazka=scisys.co.uk at rtems
> .org] On Behalf Of Patricia Lopez-Cueva
> Sent: 27 February 2007 16:33
> To: rtems-users at rtems.org
> Subject: timer_settime doesn't fill siginfo_t
> 
> Hi all.
> 
>  
> 
> I'm programming an application that uses Posix timers in 
> rtems.  I have to pass to the signal handler information so I 
> have to use SA_SIGINFO and put the information in the 
> sigevent structure. 
> 
> The problem is that when the handler is called and I access 
> to the siginfo_t parameter and in the si_value.sival_ptr the 
> information I store is not there.
> 
>  
> 
> Following it is included the code:
> 
>  
> 
>         struct sigevent t_Evp;
> 
>         struct sigaction t_SigAction;
> 
>  
> 
>         /* Initialise signal handler */
> 
>         sigemptyset(&t_SigAction.sa_mask);
> 
>         t_SigAction.sa_flags = SA_SIGINFO;
> 
>         t_SigAction.sa_sigaction = &SignalHandler;
> 
>         if (0 != sigaction(SIGUSR1, &t_SigAction, NULL))
> 
>         {
> 
>                 ERROR("Failed to install signal handler using 
> sigaction\n");
> 
>                 return G_STATUS_FAILURE;
> 
>         }
> 
>  
> 
>         /* Create timer */
> 
>         DEBUG("Creating POSIX timer\n");
> 
>         t_Evp.sigev_notify = SIGEV_SIGNAL;
> 
>         t_Evp.sigev_signo = SIGUSR1;
> 
>         t_Evp.sigev_value.sival_ptr = &pt_Timer;
> 
>         if (0 != (i_Status = timer_create(CLOCK_REALTIME, 
> &t_Evp, &pt_Timer)))
> 
>         {
> 
>                 ERROR("Failed to create timer using timer_create\n");
> 
>                 switch (errno)
> 
>                 {
> 
>                         case EAGAIN:
> 
>                                 ERROR("EAGAIN: Lacked 
> necessary resources or too many timers\n");
> 
>                                 break;
> 
>                         case EINVAL:
> 
>                                 ERROR("EINVAL: Invalid 
> attributes or clock id\n");
> 
>                                 break;
> 
>                         default:
> 
>                                 ERROR1("Unknown error = %d\n", errno);
> 
>                 }
> 
>                 errno = 0;
> 
>                 return G_STATUS_FAILURE;
> 
>         }
> 
>  
> 
> static void SignalHandler(
> 
>         int             i_Signo,
> 
>         siginfo_t * pt_Info,
> 
>         void *          pv_Context);
> 
>  
> 
> Is there any error in the code? Someone knows why it happens?
> 
>  
> 
> Many thanks
> 
> Patricia
> 
>  
> 
>  
> 
>