192 lines
7.4 KiB
C
192 lines
7.4 KiB
C
/*
|
|
* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
|
|
*
|
|
* This file contains Original Code and/or Modifications of Original Code
|
|
* as defined in and that are subject to the Apple Public Source License
|
|
* Version 2.0 (the 'License'). You may not use this file except in
|
|
* compliance with the License. The rights granted to you under the License
|
|
* may not be used to create, or enable the creation or redistribution of,
|
|
* unlawful or unlicensed copies of an Apple operating system, or to
|
|
* circumvent, violate, or enable the circumvention or violation of, any
|
|
* terms of an Apple operating system software license agreement.
|
|
*
|
|
* Please obtain a copy of the License at
|
|
* http://www.opensource.apple.com/apsl/ and read it before using this file.
|
|
*
|
|
* The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
|
* Please see the License for the specific language governing rights and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_OSREFERENCE_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>
|
|
*/
|
|
#include <sys/_types/_pid_t.h>
|
|
#include <sys/_types/_time_t.h>
|
|
#include <sys/_types/_size_t.h>
|
|
|
|
/*
|
|
* [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.
|
|
*/
|
|
#if __arm64__
|
|
#define SHMLBA (16*1024) /* [XSI] Segment low boundary address multiple*/
|
|
#else /* __arm64__ */
|
|
#define SHMLBA 4096 /* [XSI] Segment low boundary address multiple*/
|
|
#endif /* __arm64__ */
|
|
|
|
/* "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)
|
|
|
|
#pragma pack(4)
|
|
|
|
/*
|
|
* 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 __DARWIN_UNIX03 || defined(KERNEL)
|
|
/*
|
|
* 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 must not be used there.
|
|
*/
|
|
#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
|
|
struct shmid_ds
|
|
#else
|
|
#define shmid_ds __shmid_ds_new
|
|
struct __shmid_ds_new
|
|
#endif
|
|
{
|
|
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 */
|
|
shmatt_t 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 */
|
|
};
|
|
#else /* !__DARWIN_UNIX03 */
|
|
#define shmid_ds __shmid_ds_old
|
|
#endif /* !__DARWIN_UNIX03 */
|
|
|
|
#if !__DARWIN_UNIX03
|
|
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 */
|
|
shmatt_t 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 /* !__DARWIN_UNIX03 */
|
|
|
|
#pragma pack()
|
|
|
|
#ifndef KERNEL
|
|
|
|
__BEGIN_DECLS
|
|
#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
|
|
int shmsys(int, ...);
|
|
#endif /* (!_POSIX_C_SOURCE || _DARWIN_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_ */
|