1/* Generic POSIX semaphore type layout 
2 Copyright (C) 1995-2022 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; 
40