/* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */ /* * Copyright (c) 1994 Adam Glass * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Adam Glass. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * As defined+described in "X/Open System Interfaces and Headers" * Issue 4, p. XXX */ #ifndef _SYS_SHM_H_ #define _SYS_SHM_H_ #include <sys/cdefs.h> #include <sys/_types.h> /* * [XSI] All of the symbols from <sys/ipc.h> SHALL be defined * when this header is included */ #include <sys/ipc.h> /* * [XSI] The pid_t, time_t, key_t, and size_t types shall be defined as * described in <sys/types.h>. * * NOTE: The definition of the key_t type is implicit from the * inclusion of <sys/ipc.h> */ #ifndef _PID_T typedef __darwin_pid_t pid_t; #define _PID_T #endif #ifndef _TIME_T #define _TIME_T typedef __darwin_time_t time_t; #endif #ifndef _SIZE_T #define _SIZE_T typedef __darwin_size_t size_t; #endif /* * [XSI] The unsigned integer type used for the number of current attaches * that MUST be able to store values at least as large as a type unsigned * short. */ typedef unsigned short shmatt_t; /* * Possible flag values which may be OR'ed into the third argument to * shmat() */ #define SHM_RDONLY 010000 /* [XSI] Attach read-only (else read-write) */ #define SHM_RND 020000 /* [XSI] Round attach address to SHMLBA */ /* * This value is symbolic, and generally not expected to be sed by user * programs directly, although such ise is permitted by the standard. Its * value in our implementation is equal to the number of bytes per page. * * NOTE: We DO NOT obtain this value from the appropriate system * headers at this time, to avoid the resulting namespace * pollution, which is why we discourages its use. */ #define SHMLBA 4096 /* [XSI] Segment low boundary address multiple*/ /* "official" access mode definitions; somewhat braindead since you have to specify (SHM_* >> 3) for group and (SHM_* >> 6) for world permissions */ #define SHM_R (IPC_R) #define SHM_W (IPC_W) /* * Technically, we should force all code references to the new structure * definition, not in just the standards conformance case, and leave the * legacy interface there for binary compatibility only. Currently, we * are only forcing this for programs requesting standards conformance. */ #if defined(__POSIX_C_SOURCE) || defined(kernel) || defined(__LP64__) /* * Structure used internally. * * This structure is exposed because standards dictate that it is used as * the third argment to shmctl(). * * NOTE: The field shm_internal is not meaningful in user space, * and mst not be used there. */ struct __shmid_ds_new { struct __ipc_perm_new shm_perm; /* [XSI] Operation permission value */ size_t shm_segsz; /* [XSI] Size of segment in bytes */ pid_t shm_lpid; /* [XSI] PID of last shared memory op */ pid_t shm_cpid; /* [XSI] PID of creator */ short shm_nattch; /* [XSI] Number of current attaches */ time_t shm_atime; /* [XSI] Time of last shmat() */ time_t shm_dtime; /* [XSI] Time of last shmdt() */ time_t shm_ctime; /* [XSI] Time of last shmctl() change */ void *shm_internal; /* reserved for kernel use */ }; #define shmid_ds __shmid_ds_new #else /* !_POSIX_C_SOURCE */ #define shmid_ds __shmid_ds_old #endif /* !_POSIX_C_SOURCE */ #if !defined(__POSIX_C_SOURCE) && !defined(__LP64__) struct __shmid_ds_old { struct __ipc_perm_old shm_perm; /* [XSI] Operation permission value */ size_t shm_segsz; /* [XSI] Size of segment in bytes */ pid_t shm_lpid; /* [XSI] PID of last shared memory op */ pid_t shm_cpid; /* [XSI] PID of creator */ short shm_nattch; /* [XSI] Number of current attaches */ time_t shm_atime; /* [XSI] Time of last shmat() */ time_t shm_dtime; /* [XSI] Time of last shmdt() */ time_t shm_ctime; /* [XSI] Time of last shmctl() change */ void *shm_internal; /* reserved for kernel use */ }; #endif /* !_POSIX_C_SOURCE */ #ifndef KERNEL __BEGIN_DECLS #ifndef _POSIX_C_SOURCE int shmsys(int, ...); #endif /* !_POSIX_C_SOURCE */ void *shmat (int, const void *, int); int shmctl(int, int, struct shmid_ds *) __DARWIN_ALIAS(shmctl); int shmdt(const void *); int shmget(key_t, size_t, int); __END_DECLS #endif /* !KERNEL */ #endif /* !_SYS_SHM_H_ */