summary refs log tree commit diff
path: root/sysdeps/x86/bits/semaphore.h
blob: c8c0e5c3fe12c56c550d3fb2d98230383ac3501d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   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/>.  */

#ifndef _SEMAPHORE_H
# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
#endif

#include <bits/wordsize.h>

#if __WORDSIZE == 64
# define __SIZEOF_SEM_T	32
#else
# define __SIZEOF_SEM_T	16
#endif


/* Value returned if `sem_open' failed.  */
#define SEM_FAILED      ((sem_t *) 0)


typedef union
{
  char __size[__SIZEOF_SEM_T];
  long int __align;
} sem_t;