shm.h revision 189283
139213Sgibbs/* $FreeBSD: head/sys/sys/shm.h 189283 2009-03-02 18:53:30Z kib $ */ 239213Sgibbs/* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */ 3111206Sken 439213Sgibbs/*- 539213Sgibbs * Copyright (c) 1994 Adam Glass 639213Sgibbs * All rights reserved. 739213Sgibbs * 839213Sgibbs * Redistribution and use in source and binary forms, with or without 939213Sgibbs * modification, are permitted provided that the following conditions 1039213Sgibbs * are met: 1139213Sgibbs * 1. Redistributions of source code must retain the above copyright 1239213Sgibbs * notice, this list of conditions and the following disclaimer. 1339213Sgibbs * 2. Redistributions in binary form must reproduce the above copyright 1439213Sgibbs * notice, this list of conditions and the following disclaimer in the 1539213Sgibbs * documentation and/or other materials provided with the distribution. 1639213Sgibbs * 3. All advertising materials mentioning features or use of this software 1739213Sgibbs * must display the following acknowledgement: 1839213Sgibbs * This product includes software developed by Adam Glass. 1939213Sgibbs * 4. The name of the author may not be used to endorse or promote products 2039213Sgibbs * derived from this software without specific prior written permission 2139213Sgibbs * 2239213Sgibbs * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 2339213Sgibbs * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2439213Sgibbs * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2539213Sgibbs * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2639213Sgibbs * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2750477Speter * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2839213Sgibbs * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2939213Sgibbs * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3039213Sgibbs * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 3139213Sgibbs * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3239213Sgibbs */ 3339213Sgibbs 3439213Sgibbs/* 3539213Sgibbs * As defined+described in "X/Open System Interfaces and Headers" 3639213Sgibbs * Issue 4, p. XXX 3739213Sgibbs */ 3839213Sgibbs 3939213Sgibbs#ifndef _SYS_SHM_H_ 4039213Sgibbs#define _SYS_SHM_H_ 4139213Sgibbs 4239213Sgibbs#include <sys/cdefs.h> 4339213Sgibbs#include <sys/ipc.h> 4439213Sgibbs#include <sys/_types.h> 4539213Sgibbs 4639213Sgibbs#define SHM_RDONLY 010000 /* Attach read-only (else read-write) */ 4739213Sgibbs#define SHM_RND 020000 /* Round attach address to SHMLBA */ 4839213Sgibbs#define SHMLBA PAGE_SIZE /* Segment low boundary address multiple */ 4940020Sken 5039213Sgibbs/* "official" access mode definitions; somewhat braindead since you have 5139213Sgibbs to specify (SHM_* >> 3) for group and (SHM_* >> 6) for world permissions */ 5239213Sgibbs#define SHM_R (IPC_R) 5339213Sgibbs#define SHM_W (IPC_W) 5460041Sphk 5551836Sphk/* predefine tbd *LOCK shmctl commands */ 5651836Sphk#define SHM_LOCK 11 5739213Sgibbs#define SHM_UNLOCK 12 5839213Sgibbs 59105421Snjl/* ipcs shmctl commands for Linux compatability */ 6060422Sken#define SHM_STAT 13 6139213Sgibbs#define SHM_INFO 14 6239213Sgibbs 6339213Sgibbs#ifndef _PID_T_DECLARED 6439213Sgibbstypedef __pid_t pid_t; 6539213Sgibbs#define _PID_T_DECLARED 6639213Sgibbs#endif 6739213Sgibbs 6839213Sgibbs#ifndef _TIME_T_DECLARED 6939213Sgibbstypedef __time_t time_t; 7039213Sgibbs#define _TIME_T_DECLARED 7139213Sgibbs#endif 7239213Sgibbs 7339213Sgibbs#ifndef _SIZE_T_DECLARED 7439213Sgibbstypedef __size_t size_t; 7539213Sgibbs#define _SIZE_T_DECLARED 7639213Sgibbs#endif 7739213Sgibbs 7839213Sgibbsstruct shmid_ds { 7939213Sgibbs struct ipc_perm shm_perm; /* operation permission structure */ 8039213Sgibbs int shm_segsz; /* size of segment in bytes */ 8139213Sgibbs pid_t shm_lpid; /* process ID of last shared memory op */ 82111206Sken pid_t shm_cpid; /* process ID of creator */ 83111206Sken short shm_nattch; /* number of current attaches */ 84111206Sken time_t shm_atime; /* time of last shmat() */ 85111206Sken time_t shm_dtime; /* time of last shmdt() */ 86111206Sken time_t shm_ctime; /* time of last change by shmctl() */ 87111206Sken void *shm_internal; /* sysv stupidity */ 8839213Sgibbs}; 8939213Sgibbs 9039213Sgibbs#ifdef _KERNEL 9139213Sgibbs 9239213Sgibbs/* 9339213Sgibbs * System 5 style catch-all structure for shared memory constants that 9439213Sgibbs * might be of interest to user programs. Do we really want/need this? 9539213Sgibbs */ 9639213Sgibbsstruct shminfo { 9739213Sgibbs u_long shmmax; /* max shared memory segment size (bytes) */ 9839213Sgibbs u_long shmmin; /* max shared memory segment size (bytes) */ 99111206Sken u_long shmmni; /* max number of shared memory identifiers */ 100111206Sken u_long shmseg; /* max shared memory segments per process */ 101111206Sken u_long shmall; /* max amount of shared memory (pages) */ 10239213Sgibbs}; 10339213Sgibbs 10439213Sgibbs/* 10539213Sgibbs * Add a kernel wrapper to the shmid_ds struct so that private info (like the 10639213Sgibbs * MAC label) can be added to it, without changing the user interface. 10739213Sgibbs */ 10839213Sgibbsstruct shmid_kernel { 10939213Sgibbs struct shmid_ds u; 11039213Sgibbs struct label *label; /* MAC label */ 11139213Sgibbs size_t shm_bsegsz; 11239213Sgibbs}; 11339213Sgibbs 11439213Sgibbsextern struct shminfo shminfo; 11539213Sgibbs 11639213Sgibbsstruct shm_info { 11739213Sgibbs int used_ids; 11839213Sgibbs unsigned long shm_tot; 11939213Sgibbs unsigned long shm_rss; 12039213Sgibbs unsigned long shm_swp; 12139213Sgibbs unsigned long swap_attempts; 122111206Sken unsigned long swap_successes; 123111206Sken}; 124111206Sken 125111206Skenstruct thread; 126111206Skenstruct proc; 127111206Skenstruct vmspace; 128111206Sken 129111206Skenvoid shmexit(struct vmspace *); 130111206Skenvoid shmfork(struct proc *, struct proc *); 131111206Sken#else /* !_KERNEL */ 13239213Sgibbs 13339213Sgibbs#include <sys/cdefs.h> 13439213Sgibbs 13539213Sgibbs#ifndef _SIZE_T_DECLARED 13639213Sgibbstypedef __size_t size_t; 13739213Sgibbs#define _SIZE_T_DECLARED 13839213Sgibbs#endif 13939213Sgibbs 14046581Sken__BEGIN_DECLS 14159249Sphkint shmsys(int, ...); 14260938Sjakevoid *shmat(int, const void *, int); 14339213Sgibbsint shmget(key_t, size_t, int); 14439213Sgibbsint shmctl(int, int, struct shmid_ds *); 14539213Sgibbsint shmdt(const void *); 14639213Sgibbs__END_DECLS 14760938Sjake 14839213Sgibbs#endif /* !_KERNEL */ 14939213Sgibbs 15039213Sgibbs#endif /* !_SYS_SHM_H_ */ 151104456Sphk