1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*      Copyright (c) 1984 AT&T */
28/*        All Rights Reserved   */
29
30#ifndef _sys_shm_h
31#define	_sys_shm_h
32
33#pragma ident	"%Z%%M%	%I%	%E% SMI"
34
35/*
36 *	IPC Shared Memory Facility.
37 */
38
39#include <sys/param.h>
40/* #include <machine/mmu.h> */
41
42/*
43 *	Shared Memory Operation Flags.
44 */
45
46#define	SHM_RDONLY	010000	/* attach read-only (else read-write) */
47#define	SHM_RND		020000	/* round attach address to SHMLBA */
48
49/*
50 * Shmctl Command Definitions.
51 */
52
53#define SHM_LOCK	3	/* Lock segment in core */
54#define SHM_UNLOCK	4	/* Unlock segment */
55
56/*
57 *	Implementation Constants.
58 */
59#define	SHMLBA	PAGESIZE	/* segment low boundary address multiple */
60				/* (SHMLBA must be a power of 2) */
61
62/*
63 *	Structure Definitions.
64 */
65
66/*
67 *	There is a shared mem id data structure for each segment in the system.
68 */
69
70struct shmid_ds {
71	struct ipc_perm	shm_perm;	/* operation permission struct */
72	uint		shm_segsz;	/* size of segment in bytes */
73	ushort		shm_lpid;	/* pid of last shmop */
74	ushort		shm_cpid;	/* pid of creator */
75	ushort		shm_nattch;	/* number of current attaches */
76	time_t		shm_atime;	/* last shmat time */
77	time_t		shm_dtime;	/* last shmdt time */
78	time_t		shm_ctime;	/* last change time */
79	struct anon_map	*shm_amp;	/* segment anon_map pointer */
80};
81
82#endif /* !_sys_shm_h */
83