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	1	/*
	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	/* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */
	29
	30	/*
	31	* Copyright (c) 1994 Adam Glass
	32	* All rights reserved.
	33	*
	34	* Redistribution and use in source and binary forms, with or without
	35	* modification, are permitted provided that the following conditions
	36	* are met:
	37	* 1. Redistributions of source code must retain the above copyright
	38	* notice, this list of conditions and the following disclaimer.
	39	* 2. Redistributions in binary form must reproduce the above copyright
	40	* notice, this list of conditions and the following disclaimer in the
	41	* documentation and/or other materials provided with the distribution.
	42	* 3. All advertising materials mentioning features or use of this software
	43	* must display the following acknowledgement:
	44	* This product includes software developed by Adam Glass.
	45	* 4. The name of the author may not be used to endorse or promote products
	46	* derived from this software without specific prior written permission
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	49	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	50	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	51	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	52	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	53	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	54	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	55	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	56	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	57	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	58	*/
	59
	60	/*
	61	* As defined+described in "X/Open System Interfaces and Headers"
	62	* Issue 4, p. XXX
	63	*/
	64
	65	#ifndef _SYS_SHM_INTERNALH_
	66	#define _SYS_SHM_INTERNALH_
	67
	68	#include <sys/shm.h>
	69	#include <sys/cdefs.h>
	70
	71	#include <machine/types.h>
	72
	73	#if __DARWIN_ALIGN_NATURAL
	74	#pragma options align=natural
	75	#endif
	76
	77	struct user_shmid_ds {
	78	struct ipc_perm shm_perm; /* operation permission structure */
	79	user_size_t shm_segsz; /* size of segment in bytes */
	80	pid_t shm_lpid; /* PID of last shared memory op */
	81	pid_t shm_cpid; /* PID of creator */
	82	short shm_nattch; /* number of current attaches */
	83	time_t shm_atime; /* time of last shmat() */
	84	time_t shm_dtime; /* time of last shmdt() */
	85	time_t shm_ctime; /* time of last change by shmctl() */
	86	user_addr_t shm_internal; /* reserved for kernel use */
	87	};
	88
	89	#if __DARWIN_ALIGN_NATURAL
	90	#pragma options align=reset
	91	#endif
	92
	93	/*
	94	* System 5 style catch-all structure for shared memory constants that
	95	* might be of interest to user programs. Also part of the ipcs interface.
	96	* Note: use of user_ssize_t intentional: permits 32 bit ipcs to provide
	97	* information about 64 bit programs shared segments.
	98	* Note 2: user_ssize_t is not that useful if it's not 64-bit,
	99	* so let's use int64_t explicitely...
	100	*/
	101	struct shminfo {
	102	int64_t shmmax; /* max shm segment size (bytes) */
	103	int64_t shmmin; /* min shm segment size (bytes) */
	104	int64_t shmmni; /* max number of shm identifiers */
	105	int64_t shmseg; /* max shm segments per process */
	106	int64_t shmall; /* max amount of shm (pages) */
	107	};
	108
	109	#ifdef KERNEL
	110	extern struct shminfo shminfo;
	111	extern struct user_shmid_ds *shmsegs;
	112
	113	struct proc;
	114
	115	__BEGIN_DECLS
	116
	117	void shmexit(struct proc *);
	118	int shmfork(struct proc , struct proc );
	119	__private_extern__ void shmexec(struct proc *);
	120
	121	__END_DECLS
	122
	123	#endif /* kernel */
	124
	125	#endif /* !_SYS_SHM_INTERNALH_ */