1/* Copyright (C) 1995-2025 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#include <bits/types/struct_semid64_ds.h>
26
27/* Flags for `semop'.  */
28#define SEM_UNDO	0x1000		/* undo the operation on exit */
29
30/* Commands for `semctl'.  */
31#define GETPID		11		/* get sempid */
32#define GETVAL		12		/* get semval */
33#define GETALL		13		/* get all semval's */
34#define GETNCNT		14		/* get semncnt */
35#define GETZCNT		15		/* get semzcnt */
36#define SETVAL		16		/* set semval */
37#define SETALL		17		/* set all semval's */
38
39/* The user should define a union like the following to use it for arguments
40   for `semctl'.
41
42   union semun
43   {
44     int val;				<= value for SETVAL
45     struct semid_ds *buf;		<= buffer for IPC_STAT & IPC_SET
46     unsigned short int *array;		<= array for GETALL & SETALL
47     struct seminfo *__buf;		<= buffer for IPC_INFO
48   };
49
50   Previous versions of this file used to define this union but this is
51   incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
52   one must define the union or not.  */
53#define _SEM_SEMUN_UNDEFINED	1
54
55#ifdef __USE_MISC
56
57/* ipcs ctl cmds */
58# define SEM_STAT 18
59# define SEM_INFO 19
60# define SEM_STAT_ANY 20
61
62struct  seminfo
63{
64  int semmap;
65  int semmni;
66  int semmns;
67  int semmnu;
68  int semmsl;
69  int semopm;
70  int semume;
71  int semusz;
72  int semvmx;
73  int semaem;
74};
75
76#endif /* __USE_MISC */