sysdeps/tile/nptl/bits/semaphore.h

   1 /* Copyright (C) 2011-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   4    Based on work contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 #ifndef _SEMAPHORE_H
  21 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
  22 #endif
  23
  24 #include <bits/wordsize.h>
  25
  26 #if __WORDSIZE == 64
  27 # define __SIZEOF_SEM_T 32
  28 #else
  29 # define __SIZEOF_SEM_T 16
  30 #endif
  31
  32
  33 /* Value returned if `sem_open' failed.  */
  34 #define SEM_FAILED      ((sem_t *) 0)
  35
  36
  37 typedef union
  38 {
  39   char __size[__SIZEOF_SEM_T];
  40   long int __align;
  41 } sem_t;