1/* Copyright (C) 1995-2018 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 <http://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
37typedef __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. */
49extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW;
50
51/* Get shared memory segment. */
52extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW;
53
54/* Attach shared memory segment. */
55extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
56 __THROW;
57
58/* Detach shared memory segment. */
59extern int shmdt (const void *__shmaddr) __THROW;
60
61__END_DECLS
62
63#endif /* sys/shm.h */
64