/* Copyright (C) 1995-2025 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _SYS_SHM_H
#define _SYS_SHM_H	1

#include <features.h>

#define __need_size_t
#include <stddef.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>

/* Define types required by the standard.  */
#include <bits/types/time_t.h>

#ifdef __USE_XOPEN
# ifndef __pid_t_defined
typedef __pid_t pid_t;
#  define __pid_t_defined
# endif
#endif	/* X/Open */


__BEGIN_DECLS

/* The following System V style IPC functions implement a shared memory
   facility.  The definition is found in XPG4.2.  */

/* Shared memory control operation.  */
#ifndef __USE_TIME64_REDIRECTS
extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW;
#else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (shmctl,
                           (int __shmid, int __cmd, struct shmid_ds *__buf),
                           __shmctl64);
# else
#  define shmctl __shmctl64
# endif
#endif

/* Get shared memory segment.  */
extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW;

/* Attach shared memory segment.  */
extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
     __THROW;

/* Detach shared memory segment.  */
extern int shmdt (const void *__shmaddr) __THROW;

__END_DECLS

#endif /* sys/shm.h */
