nptl/sem_timedwait.c

   1 /* sem_timedwait -- wait on a semaphore with timeout.
   2    Copyright (C) 2003-2021 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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <time.h>
  21 #include "semaphoreP.h"
  22 #include "sem_waitcommon.c"
  23
  24 /* This is in a separate file because because sem_timedwait is only provided
  25    if __USE_XOPEN2K is defined.  */
  26 int
  27 ___sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime)
  28 {
  29   if (! valid_nanoseconds (abstime->tv_nsec))
  30     {
  31       __set_errno (EINVAL);
  32       return -1;
  33     }
  34
  35   /* Check sem_wait.c for a more detailed explanation why it is required.  */
  36   __pthread_testcancel ();
  37
  38   if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
  39     return 0;
  40   else
  41     return __new_sem_wait_slow64 ((struct new_sem *) sem,
  42                                   CLOCK_REALTIME, abstime);
  43 }
  44
  45 #if __TIMESIZE == 64
  46 strong_alias (___sem_timedwait64, ___sem_timedwait)
  47 #else /* __TIMESPEC64 != 64 */
  48 libc_hidden_ver (___sem_timedwait64, __sem_timedwait64)
  49 #ifndef SHARED
  50 strong_alias (___sem_timedwait64, __sem_timedwait64)
  51 #endif
  52
  53 int
  54 ___sem_timedwait (sem_t *sem, const struct timespec *abstime)
  55 {
  56   struct __timespec64 ts64 = valid_timespec_to_timespec64 (*abstime);
  57
  58   return __sem_timedwait64 (sem, &ts64);
  59 }
  60 #endif /* __TIMESPEC64 != 64 */
  61 versioned_symbol (libc, ___sem_timedwait, sem_timedwait, GLIBC_2_34);
  62 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
  63 compat_symbol (libpthread, ___sem_timedwait, sem_timedwait, GLIBC_2_2);
  64 #endif