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glibc  2.9
timer_getoverr.c
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00001 /* Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public License as
00007    published by the Free Software Foundation; either version 2.1 of the
00008    License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; see the file COPYING.LIB.  If not,
00017    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00018    Boston, MA 02111-1307, USA.  */
00019 
00020 #include <errno.h>
00021 #include <pthread.h>
00022 #include <time.h>
00023 
00024 #include "posix-timer.h"
00025 
00026 
00027 /* Get expiration overrun for timer TIMERID.  */
00028 int
00029 timer_getoverrun (timerid)
00030      timer_t timerid;
00031 {
00032   struct timer_node *timer;
00033   int retval = -1;
00034 
00035   pthread_mutex_lock (&__timer_mutex);
00036 
00037   if (! timer_valid (timer = timer_id2ptr (timerid)))
00038     __set_errno (EINVAL);
00039   else
00040     retval = timer->overrun_count;
00041 
00042   pthread_mutex_unlock (&__timer_mutex);
00043 
00044   return retval;
00045 }