linux-kernel - BUG? timer_create() with SIGEV_THREAD not working (at least on ppc64)

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Message-ID: <4922E9EC.3070606@nortel.com>
Date:	Tue, 18 Nov 2008 10:14:36 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	tglx@...utronix.de
Subject: BUG?  timer_create() with SIGEV_THREAD not working (at least on ppc64)

The code below sets up a simple timer with SIGEV_THREAD.  I compiled the 
code as "g++ timertest.cc -o timertest -lrt -pthread".

Running it on my G5 with 2.6.27 (but with an older glibc), it prints:

Creating timer
Setting timer 268509264 for 5-second expiration...

and then the timer never expires.  I have an old Fedora Core 4 x86 
machine and there it works as expected.

Is there some hard requirement to upgrade glibc?  If not, then this 
looks like a bug somewhere.

Thanks,

Chris



int main(void)
{
     timer_t  timer_id;
     struct itimerspec    its;
     struct sigevent      se;

     // set timer signal event
     se.sigev_notify = SIGEV_THREAD;
     se.sigev_value.sival_ptr = &timer_id;
     se.sigev_notify_function = handler;
     se.sigev_notify_attributes = NULL;

     if ( timer_create(CLOCK_REALTIME, &se, &timer_id) < 0)
     {
         printf("create timer failed\n");
         fflush(0);
         return 0;
     }

     // set timer.
     its.it_value.tv_sec     = 1;
     its.it_value.tv_nsec    = 0;
     its.it_interval.tv_sec  = 1;
     its.it_interval.tv_nsec = 0;
     if ( timer_settime(timer_id, 0, &its, NULL) < 0)
     {
         printf("set timer failed\n");
         fflush(0);
         return 0;
     }

     printf("set timer OK\n");
     fflush(0);

     while(1)
     {  pause();}
     return 0;
}
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