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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley 4.3 BSD
* under license from the Regents of the University of California.
*/
#ifndef _SYS_SHM_H
#define _SYS_SHM_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/ipc.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* IPC Shared Memory Facility.
*/
/*
* Implementation Constants.
*/
#if (defined(_KERNEL) || defined(_KMEMUSER))
#define SHMLBA PAGESIZE /* segment low boundary address multiple */
/* (SHMLBA must be a power of 2) */
#else
#include <sys/unistd.h> /* needed for _SC_PAGESIZE */
extern long _sysconf(int); /* System Private interface to sysconf() */
#define SHMLBA (_sysconf(_SC_PAGESIZE))
#endif /* defined(_KERNEL) || defined(_KMEMUSER)) */
/*
* Permission Definitions.
*/
#define SHM_R 0400 /* read permission */
#define SHM_W 0200 /* write permission */
/*
* Message Operation Flags.
*/
#define SHM_RDONLY 010000 /* attach read-only (else read-write) */
#define SHM_RND 020000 /* round attach address to SHMLBA */
#define SHM_SHARE_MMU 040000 /* share VM resources such as page table */
#define SHM_PAGEABLE 0100000 /* pageable ISM */
/*
* Valid flags bits for shmat shmflag argument.
*/
#define SHMAT_VALID_FLAGS_MASK \
(SHM_R | SHM_W | SHM_RDONLY | SHM_RND | SHM_SHARE_MMU | SHM_PAGEABLE)
typedef unsigned long shmatt_t;
/*
* Structure Definitions.
*/
struct shmid_ds {
struct ipc_perm shm_perm; /* operation permission struct */
size_t shm_segsz; /* size of segment in bytes */
#if defined(_LP64) || defined(_XOPEN_SOURCE)
void *shm_amp;
#else
struct anon_map *shm_amp; /* segment anon_map pointer */
#endif
ushort_t shm_lkcnt; /* number of times it is being locked */
pid_t shm_lpid; /* pid of last shmop */
pid_t shm_cpid; /* pid of creator */
shmatt_t shm_nattch; /* number of attaches */
ulong_t shm_cnattch; /* number of ISM attaches */
#if defined(_LP64)
time_t shm_atime; /* last shmat time */
time_t shm_dtime; /* last shmdt time */
time_t shm_ctime; /* last change time */
int64_t shm_pad4[4]; /* reserve area */
#else /* _LP64 */
time_t shm_atime; /* last shmat time */
int32_t shm_pad1; /* reserved for time_t expansion */
time_t shm_dtime; /* last shmdt time */
int32_t shm_pad2; /* reserved for time_t expansion */
time_t shm_ctime; /* last change time */
int32_t shm_pad3; /* reserved for time_t expansion */
int32_t shm_pad4[4]; /* reserve area */
#endif /* _LP64 */
};
/*
* Shared memory control operations
*/
#define SHM_LOCK 3 /* Lock segment in core */
#define SHM_UNLOCK 4 /* Unlock segment */
#if !defined(_KERNEL)
#if defined(__STDC__)
int shmget(key_t, size_t, int);
int shmids(int *, uint_t, uint_t *);
int shmctl(int, int, struct shmid_ds *);
void *shmat(int, const void *, int);
#if defined(_XPG4)
int shmdt(const void *);
#else
int shmdt(char *);
#endif /* defined(_XPG4) */
#else /* __STDC__ */
int shmctl();
int shmget();
int shmids();
void *shmat();
int shmdt();
#endif /* __STDC__ */
#endif /* !defined(_KERNEL) */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SHM_H */
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