timer_create creates thread

Hi,

I am developing an application on the montavista platform which uses
the timer_create api to create timers as following:

timer_event.sigev_notify = SIGEV_SIGNAL;
timer_event.sigev_signo = SIGRTMIN;
timer_event.sigev_value.sival_ptr = data;

sigfillset (&timer_action.sa_mask);
timer_action.sa_flags = SA_SIGINFO ; /* realtime signal */
timer_action.sa_sigaction = timer_handler;
sigaction (SIGRTMIN, &timer_action, NULL);

/* Create the timer */
if( timer_create (CLOCK_REALTIME, &timer_event, &timer_id) !=0 ) {
return -1;
}

I've noticed that the timer_create api calls clone which in turn
creats a thread.
#0 0x00becf70 in clone () from /lib/tls/libc.so.6
#1 0x001619ae in do_clone () from /lib/tls/libpthread.so.0
#2 0x001615f6 in create_thread () from /lib/tls/libpthread.so.0
#3 0x00160f9d in pthread_create@@GLIBC_2.1 () from /lib/tls/
libpthread.so.0
#4 0x00fbd909 in __timer_thread_start () from /lib/tls/librt.so.1
#5 0x00fbc659 in compat_timer_create () from /lib/tls/librt.so.1
#6 0x00fbc371 in timer_create () from /lib/tls/librt.so.1

However, this thread doesn't seem to go away once the timer has
expired. It seems to be stuck in pthread_cond_wait.

#1 0x003ba006 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/
libc.so.6
#2 0x00e6de5a in thread_func () from /lib/tls/librt.so.1
#3 0x00645dd8 in start_thread () from /lib/tls/libpthread.so.0
#4 0x003acfca in clone () from /lib/tls/libc.so.6

Is there any way I can get the thread to terminate or use any other
option which causes in threads not being created ?

Thanks.

-- Achint

On Jul 9, 1:28*pm, Achint Mehta <achintme...@gmail.com> wrote:
[color=blue]
> However, this thread doesn't seem to go away once the timer has
> expired. It seems to be stuck in pthread_cond_wait.[/color]
[color=blue]
> Is there any way I can get the thread to terminate or use any other
> option which causes in threads not being created ?[/color]


Do you have an actual problem? Why do you care about internal
implementation details?

DS

Achint Mehta <achintmehta@gmail.com> writes:[color=blue]
> I am developing an application on the montavista platform which uses
> the timer_create api to create timers as following:
>
> timer_event.sigev_notify = SIGEV_SIGNAL;
> timer_event.sigev_signo = SIGRTMIN;
> timer_event.sigev_value.sival_ptr = data;
>
> sigfillset (&timer_action.sa_mask);
> timer_action.sa_flags = SA_SIGINFO ; /* realtime signal */
> timer_action.sa_sigaction = timer_handler;
> sigaction (SIGRTMIN, &timer_action, NULL);
>
> /* Create the timer */
> if( timer_create (CLOCK_REALTIME, &timer_event, &timer_id) !=0 ) {
> return -1;
> }
>
> I've noticed that the timer_create api calls clone which in turn
> creats a thread.[/color]

[...]
[color=blue]
> However, this thread doesn't seem to go away once the timer has
> expired. It seems to be stuck in pthread_cond_wait.[/color]

[...]
[color=blue]
> Is there any way I can get the thread to terminate or use any other
> option which causes in threads not being created ?[/color]

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