1/* Copyright (C) 1995-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#ifndef _SYS_SEM_H
19# error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
20#endif
21
22#include <sys/types.h>
23#include <bits/timesize.h>
24#include <bits/types/struct_semid_ds.h>
25
26/* Flags for `semop'. */
27#define SEM_UNDO 0x1000 /* undo the operation on exit */
28
29/* Commands for `semctl'. */
30#define GETPID 11 /* get sempid */
31#define GETVAL 12 /* get semval */
32#define GETALL 13 /* get all semval's */
33#define GETNCNT 14 /* get semncnt */
34#define GETZCNT 15 /* get semzcnt */
35#define SETVAL 16 /* set semval */
36#define SETALL 17 /* set all semval's */
37
38/* The user should define a union like the following to use it for arguments
39 for `semctl'.
40
41 union semun
42 {
43 int val; <= value for SETVAL
44 struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET
45 unsigned short int *array; <= array for GETALL & SETALL
46 struct seminfo *__buf; <= buffer for IPC_INFO
47 };
48
49 Previous versions of this file used to define this union but this is
50 incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether
51 one must define the union or not. */
52#define _SEM_SEMUN_UNDEFINED 1
53
54#ifdef __USE_MISC
55
56/* ipcs ctl cmds */
57# define SEM_STAT 18
58# define SEM_INFO 19
59# define SEM_STAT_ANY 20
60
61struct seminfo
62{
63 int semmap;
64 int semmni;
65 int semmns;
66 int semmnu;
67 int semmsl;
68 int semopm;
69 int semume;
70 int semusz;
71 int semvmx;
72 int semaem;
73};
74
75#endif /* __USE_MISC */
76