glibc/nptl/sem_timedwait.c

/* sem_timedwait -- wait on a semaphore with timeout.
   Copyright (C) 2003-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <time.h>
#include "semaphoreP.h"
#include "sem_waitcommon.c"

/* This is in a separate file because because sem_timedwait is only provided
   if __USE_XOPEN2K is defined.  */
int
___sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime)
{
  if (! valid_nanoseconds (abstime->tv_nsec))
    {
      __set_errno (EINVAL);
      return -1;
    }

  /* Check sem_wait.c for a more detailed explanation why it is required.  */
  __pthread_testcancel ();

  if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
    return 0;
  else
    return __new_sem_wait_slow64 ((struct new_sem *) sem,
				  CLOCK_REALTIME, abstime);
}

#if __TIMESIZE == 64
strong_alias (___sem_timedwait64, ___sem_timedwait)
#else /* __TIMESPEC64 != 64 */
libc_hidden_ver (___sem_timedwait64, __sem_timedwait64)
#ifndef SHARED
strong_alias (___sem_timedwait64, __sem_timedwait64)
#endif

int
___sem_timedwait (sem_t *sem, const struct timespec *abstime)
{
  struct __timespec64 ts64 = valid_timespec_to_timespec64 (*abstime);

  return __sem_timedwait64 (sem, &ts64);
}
#endif /* __TIMESPEC64 != 64 */
versioned_symbol (libc, ___sem_timedwait, sem_timedwait, GLIBC_2_34);
#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
compat_symbol (libpthread, ___sem_timedwait, sem_timedwait, GLIBC_2_2);
#endif