X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/43866e378188c25dd1e2208016ab3cbeb086ae6c..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/bsd/sys/shm.h diff --git a/bsd/sys/shm.h b/bsd/sys/shm.h index f6f43f5f8..150261adc 100644 --- a/bsd/sys/shm.h +++ b/bsd/sys/shm.h @@ -1,16 +1,19 @@ /* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * Copyright (c) 1999-2003 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. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * 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 @@ -20,7 +23,7 @@ * Please see the License for the specific language governing rights and * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */ @@ -62,63 +65,122 @@ #ifndef _SYS_SHM_H_ #define _SYS_SHM_H_ -#include -#include +#include +#include + +/* + * [XSI] All of the symbols from SHALL be defined + * when this header is included + */ #include -#define SHM_RDONLY 010000 /* Attach read-only (else read-write) */ -#define SHM_RND 020000 /* Round attach address to SHMLBA */ -#define SHMLBA NBPG /* Segment low boundary address multiple */ +/* + * [XSI] The pid_t, time_t, key_t, and size_t types shall be defined as + * described in . + * + * NOTE: The definition of the key_t type is implicit from the + * inclusion of + */ +#include +#include +#include + +/* + * [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) +#pragma pack(4) -struct shmid_ds { - struct ipc_perm shm_perm; /* operation permission structure */ - int shm_segsz; /* size of segment in bytes */ - pid_t shm_lpid; /* process ID of last shared memory op */ - pid_t shm_cpid; /* process ID of creator */ - short shm_nattch; /* number of current attaches */ - time_t shm_atime; /* time of last shmat() */ - time_t shm_dtime; /* time of last shmdt() */ - time_t shm_ctime; /* time of last change by shmctl() */ - void *shm_internal; /* sysv stupidity */ -}; - -#ifdef KERNEL -#ifdef __APPLE_API_PRIVATE /* - * System 5 style catch-all structure for shared memory constants that - * might be of interest to user programs. Do we really want/need this? + * 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. */ -struct shminfo { - int shmmax, /* max shared memory segment size (bytes) */ - shmmin, /* min shared memory segment size (bytes) */ - shmmni, /* max number of shared memory identifiers */ - shmseg, /* max shared memory segments per process */ - shmall; /* max amount of shared memory (pages) */ +#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 */ }; -extern struct shminfo shminfo; -extern struct shmid_ds *shmsegs; +#else /* !__DARWIN_UNIX03 */ +#define shmid_ds __shmid_ds_old +#endif /* !__DARWIN_UNIX03 */ -struct proc; +#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 */ -void shmexit __P((struct proc *)); -void shmfork __P((struct proc *, struct proc *)); -#endif /* __APPLE_API_PRIVATE */ -#else /* !KERNEL */ +#pragma pack() -#include +#ifndef KERNEL __BEGIN_DECLS -int shmsys __P((int, ...)); -void *shmat __P((int, void *, int)); -int shmget __P((key_t, int, int)); -int shmctl __P((int, int, struct shmid_ds *)); -int shmdt __P((void *)); +#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 */