glibc (2.38)
1 /* Copyright (C) 1995-2023 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
62 struct 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 */
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