1/* Generic POSIX semaphore type layout
 2   Copyright (C) 1995-2025 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#ifndef _SEMAPHORE_H
20# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
21#endif
22
23#include <bits/wordsize.h>
24
25#if __WORDSIZE == 64
26# define __SIZEOF_SEM_T	32
27#else
28# define __SIZEOF_SEM_T	16
29#endif
30
31/* Value returned if `sem_open' failed.  */
32#define SEM_FAILED      ((sem_t *) 0)
33
34
35typedef union
36{
37  char __size[__SIZEOF_SEM_T];
38  long int __align;
39} sem_t;