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/* Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SYS_SHM_H
#define _SYS_SHM_H 1
#include <features.h>
#include <unistd.h> /* for `getpagesize' declaration */
#include <sys/types.h>
/* Get common definition of System V style IPC. */
#include <sys/ipc.h>
/* Get system dependent definition of `struct shmid_ds' and more. */
#include <bits/shm.h>
/* Segment low boundary address multiple. */
#define SHMLBA (getpagesize ())
/* The following System V style IPC functions implement a shared memory
facility. The definition is found in XPG4.2. */
__BEGIN_DECLS
/* Shared memory control operation. */
extern int shmctl __P ((int __shmid, int __cmd, struct shmid_ds *__buf));
/* Get shared memory segment. */
extern int shmget __P ((key_t __key, size_t __size, int __shmflg));
/* Attach shared memory segment. */
extern void *shmat __P ((int __shmid, __const void *__shmaddr, int __shmflg));
/* Detach shared memory segment. */
extern int shmdt __P ((__const void *__shmaddr));
__END_DECLS
#endif /* sys/shm.h */
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