nptl/sem_timedwait.c

   1 /* sem_timedwait -- wait on a semaphore with timeout.
   2    Copyright (C) 2003-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <time.h>
  20 #include "semaphoreP.h"
  21 #include "sem_waitcommon.c"
  22
  23 /* This is in a separate file because because sem_timedwait is only provided
  24    if __USE_XOPEN2K is defined.  */
  25 int
  26 ___sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime)
  27 {
  28   if (! valid_nanoseconds (abstime->tv_nsec))
  29     {
  30       __set_errno (EINVAL);
  31       return -1;
  32     }
  33
  34   /* Check sem_wait.c for a more detailed explanation why it is required.  */
  35   __pthread_testcancel ();
  36
  37   if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
  38     return 0;
  39   else
  40     return __new_sem_wait_slow64 ((struct new_sem *) sem,
  41                                   CLOCK_REALTIME, abstime);
  42 }
  43
  44 #if __TIMESIZE == 64
  45 strong_alias (___sem_timedwait64, ___sem_timedwait)
  46 #else /* __TIMESPEC64 != 64 */
  47 strong_alias (___sem_timedwait64, __sem_timedwait64)
  48 libc_hidden_def (__sem_timedwait64)
  49
  50 int
  51 ___sem_timedwait (sem_t *sem, const struct timespec *abstime)
  52 {
  53   struct __timespec64 ts64 = valid_timespec_to_timespec64 (*abstime);
  54
  55   return __sem_timedwait64 (sem, &ts64);
  56 }
  57 #endif /* __TIMESPEC64 != 64 */
  58 versioned_symbol (libc, ___sem_timedwait, sem_timedwait, GLIBC_2_34);
  59 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
  60 compat_symbol (libpthread, ___sem_timedwait, sem_timedwait, GLIBC_2_2);
  61 #endif