nptl/sem_timedwait.c

   1 /* sem_timedwait -- wait on a semaphore with timeout.
   2    Copyright (C) 2003-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include "sem_waitcommon.c"
  21
  22 /* This is in a separate file because because sem_timedwait is only provided
  23    if __USE_XOPEN2K is defined.  */
  24 int
  25 sem_timedwait (sem_t *sem, const struct timespec *abstime)
  26 {
  27   if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
  28     {
  29       __set_errno (EINVAL);
  30       return -1;
  31     }
  32
  33   /* Check sem_wait.c for a more detailed explanation why it is required.  */
  34   __pthread_testcancel ();
  35
  36   if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
  37     return 0;
  38   else
  39     return __new_sem_wait_slow((struct new_sem *) sem, abstime);
  40 }