9baea4b4b4
integer to an unsigned long. This lifts variables like the maximum number of pages available for shared memory from 2^31 to 2^32 on 32 bit architectures, and from 2^31 to 2^64 on 64 bit architectures. It should be noted that this changes breaks ABI on 64 bit architectures because the size of the shmmax, shmmin, shmmni, shmseg and shmall members of the shminfo structure has changed. Silence on: current@
150 lines
4.6 KiB
C
150 lines
4.6 KiB
C
/* $FreeBSD$ */
|
|
/* $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/ipc.h>
|
|
#include <sys/_types.h>
|
|
|
|
#define SHM_RDONLY 010000 /* Attach read-only (else read-write) */
|
|
#define SHM_RND 020000 /* Round attach address to SHMLBA */
|
|
#define SHMLBA PAGE_SIZE /* 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)
|
|
|
|
/* predefine tbd *LOCK shmctl commands */
|
|
#define SHM_LOCK 11
|
|
#define SHM_UNLOCK 12
|
|
|
|
/* ipcs shmctl commands */
|
|
#define SHM_STAT 13
|
|
#define SHM_INFO 14
|
|
|
|
#ifndef _PID_T_DECLARED
|
|
typedef __pid_t pid_t;
|
|
#define _PID_T_DECLARED
|
|
#endif
|
|
|
|
#ifndef _TIME_T_DECLARED
|
|
typedef __time_t time_t;
|
|
#define _TIME_T_DECLARED
|
|
#endif
|
|
|
|
#ifndef _SIZE_T_DECLARED
|
|
typedef __size_t size_t;
|
|
#define _SIZE_T_DECLARED
|
|
#endif
|
|
|
|
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
|
|
|
|
/*
|
|
* System 5 style catch-all structure for shared memory constants that
|
|
* might be of interest to user programs. Do we really want/need this?
|
|
*/
|
|
struct shminfo {
|
|
u_long shmmax; /* max shared memory segment size (bytes) */
|
|
u_long shmmin; /* max shared memory segment size (bytes) */
|
|
u_long shmmni; /* max number of shared memory identifiers */
|
|
u_long shmseg; /* max shared memory segments per process */
|
|
u_long shmall; /* max amount of shared memory (pages) */
|
|
};
|
|
|
|
/*
|
|
* Add a kernel wrapper to the shmid_ds struct so that private info (like the
|
|
* MAC label) can be added to it, without changing the user interface.
|
|
*/
|
|
struct shmid_kernel {
|
|
struct shmid_ds u;
|
|
struct label *label; /* MAC label */
|
|
};
|
|
|
|
extern struct shminfo shminfo;
|
|
|
|
struct shm_info {
|
|
int used_ids;
|
|
unsigned long shm_tot;
|
|
unsigned long shm_rss;
|
|
unsigned long shm_swp;
|
|
unsigned long swap_attempts;
|
|
unsigned long swap_successes;
|
|
};
|
|
|
|
struct thread;
|
|
struct proc;
|
|
struct vmspace;
|
|
|
|
void shmexit(struct vmspace *);
|
|
void shmfork(struct proc *, struct proc *);
|
|
#else /* !_KERNEL */
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#ifndef _SIZE_T_DECLARED
|
|
typedef __size_t size_t;
|
|
#define _SIZE_T_DECLARED
|
|
#endif
|
|
|
|
__BEGIN_DECLS
|
|
int shmsys(int, ...);
|
|
void *shmat(int, const void *, int);
|
|
int shmget(key_t, size_t, int);
|
|
int shmctl(int, int, struct shmid_ds *);
|
|
int shmdt(const void *);
|
|
__END_DECLS
|
|
|
|
#endif /* !_KERNEL */
|
|
|
|
#endif /* !_SYS_SHM_H_ */
|