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_SHM_H
19 #define _SYS_SHM_H 1
20
21 #include <features.h>
22
23 #define __need_size_t
24 #include <stddef.h>
25
26 /* Get common definition of System V style IPC. */
27 #include <sys/ipc.h>
28
29 /* Get system dependent definition of `struct shmid_ds' and more. */
30 #include <bits/shm.h>
31
32 /* Define types required by the standard. */
33 #include <bits/types/time_t.h>
34
35 #ifdef __USE_XOPEN
36 # ifndef __pid_t_defined
37 typedef __pid_t pid_t;
38 # define __pid_t_defined
39 # endif
40 #endif /* X/Open */
41
42
43 __BEGIN_DECLS
44
45 /* The following System V style IPC functions implement a shared memory
46 facility. The definition is found in XPG4.2. */
47
48 /* Shared memory control operation. */
49 #ifndef __USE_TIME_BITS64
50 extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW;
51 #else
52 # ifdef __REDIRECT_NTH
53 extern int __REDIRECT_NTH (shmctl,
54 (int __shmid, int __cmd, struct shmid_ds *__buf),
55 __shmctl64);
56 # else
57 # define shmctl __shmctl64
58 # endif
59 #endif
60
61 /* Get shared memory segment. */
62 extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW;
63
64 /* Attach shared memory segment. */
65 extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
66 __THROW;
67
68 /* Detach shared memory segment. */
69 extern int shmdt (const void *__shmaddr) __THROW;
70
71 __END_DECLS
72
73 #endif /* sys/shm.h */
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