nptl/sysdeps/pthread/timer_getoverr.c

   1 /* Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <errno.h>
  21 #include <pthread.h>
  22 #include <time.h>
  23
  24 #include "posix-timer.h"
  25
  26
  27 /* Get expiration overrun for timer TIMERID.  */
  28 int
  29 timer_getoverrun (timerid)
  30      timer_t timerid;
  31 {
  32   struct timer_node *timer;
  33   int retval = -1;
  34
  35   pthread_mutex_lock (&__timer_mutex);
  36
  37   if (! timer_valid (timer = timer_id2ptr (timerid)))
  38     __set_errno (EINVAL);
  39   else
  40     retval = timer->overrun_count;
  41
  42   pthread_mutex_unlock (&__timer_mutex);
  43
  44   return retval;
  45 }