664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */
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/*
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* Copyright (c) 1994 Adam Glass
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Adam Glass.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* As defined+described in "X/Open System Interfaces and Headers"
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* Issue 4, p. XXX
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*/
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#ifndef _SYS_SHM_H_
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#define _SYS_SHM_H_
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#include <sys/ipc.h>
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#define SHM_RDONLY 010000 /* Attach read-only (else read-write) */
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#define SHM_RND 020000 /* Round attach address to SHMLBA */
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#define SHMLBA PAGE_SIZE /* Segment low boundary address multiple */
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/* "official" access mode definitions; somewhat braindead since you have
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to specify (SHM_* >> 3) for group and (SHM_* >> 6) for world permissions */
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#define SHM_R (IPC_R)
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#define SHM_W (IPC_W)
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struct shmid_ds {
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struct ipc_perm shm_perm; /* operation permission structure */
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int shm_segsz; /* size of segment in bytes */
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pid_t shm_lpid; /* process ID of last shared memory op */
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pid_t shm_cpid; /* process ID of creator */
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short shm_nattch; /* number of current attaches */
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time_t shm_atime; /* time of last shmat() */
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time_t shm_dtime; /* time of last shmdt() */
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time_t shm_ctime; /* time of last change by shmctl() */
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void *shm_internal; /* sysv stupidity */
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};
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#ifdef _KERNEL
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/*
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* System 5 style catch-all structure for shared memory constants that
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* might be of interest to user programs. Do we really want/need this?
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*/
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struct shminfo {
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int shmmax, /* max shared memory segment size (bytes) */
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shmmin, /* min shared memory segment size (bytes) */
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shmmni, /* max number of shared memory identifiers */
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shmseg, /* max shared memory segments per process */
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shmall; /* max amount of shared memory (pages) */
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};
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extern struct shminfo shminfo;
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extern struct shmid_ds *shmsegs;
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struct proc;
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void shmexit __P((struct proc *));
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void shmfork __P((struct proc *, struct proc *));
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#else /* !_KERNEL */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int shmsys __P((int, ...));
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void *shmat __P((int, void *, int));
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int shmget __P((key_t, int, int));
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int shmctl __P((int, int, struct shmid_ds *));
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int shmdt __P((void *));
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_SHM_H_ */
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