nptl/sem_clockwait.c

   1 /* sem_clockwait -- wait on a semaphore with timeout using the specified
   2    clock.
   3
   4    Copyright (C) 2019-2020 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #include <time.h>
  22 #include "sem_waitcommon.c"
  23
  24 int
  25 sem_clockwait (sem_t *sem, clockid_t clockid,
  26                const struct timespec *abstime)
  27 {
  28   /* Check that supplied clockid is one we support, even if we don't end up
  29      waiting.  */
  30   if (!futex_abstimed_supported_clockid (clockid))
  31     {
  32       __set_errno (EINVAL);
  33       return -1;
  34     }
  35
  36   if (! valid_nanoseconds (abstime->tv_nsec))
  37     {
  38       __set_errno (EINVAL);
  39       return -1;
  40     }
  41
  42   if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
  43     return 0;
  44   else
  45     return __new_sem_wait_slow ((struct new_sem *) sem, clockid, abstime);
  46 }