/*
 * 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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984 AT&T */
/*        All Rights Reserved   */

#ifndef _sys_shm_h
#define	_sys_shm_h

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 *	IPC Shared Memory Facility.
 */

#include <sys/param.h>
/* #include <machine/mmu.h> */

/*
 *	Shared Memory Operation Flags.
 */

#define	SHM_RDONLY	010000	/* attach read-only (else read-write) */
#define	SHM_RND		020000	/* round attach address to SHMLBA */

/*
 * Shmctl Command Definitions.
 */

#define SHM_LOCK	3	/* Lock segment in core */
#define SHM_UNLOCK	4	/* Unlock segment */

/*
 *	Implementation Constants.
 */
#define	SHMLBA	PAGESIZE	/* segment low boundary address multiple */
				/* (SHMLBA must be a power of 2) */

/*
 *	Structure Definitions.
 */

/*
 *	There is a shared mem id data structure for each segment in the system.
 */

struct shmid_ds {
	struct ipc_perm	shm_perm;	/* operation permission struct */
	uint		shm_segsz;	/* size of segment in bytes */
	ushort		shm_lpid;	/* pid of last shmop */
	ushort		shm_cpid;	/* pid of creator */
	ushort		shm_nattch;	/* number of current attaches */
	time_t		shm_atime;	/* last shmat time */
	time_t		shm_dtime;	/* last shmdt time */
	time_t		shm_ctime;	/* last change time */
	struct anon_map	*shm_amp;	/* segment anon_map pointer */
};

#endif /* !_sys_shm_h */