/* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */ /*- * SPDX-License-Identifier: BSD-4-Clause * * 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> #ifdef _WANT_SYSVSHM_INTERNALS #define _WANT_SYSVIPC_INTERNALS #endif #include <sys/ipc.h> #include <sys/_types.h> #include <machine/param.h> #define SHM_RDONLY 010000 /* Attach read-only (else read-write) */ #define SHM_RND 020000 /* Round attach address to SHMLBA */ #define SHM_REMAP 040000 /* Unmap before mapping */ #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 for Linux compatibility */ #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 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) struct shmid_ds_old { struct ipc_perm_old 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 */ }; #endif typedef unsigned int shmatt_t; struct shmid_ds { struct ipc_perm shm_perm; /* operation permission structure */ size_t 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 */ shmatt_t 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() */ }; #if defined(_KERNEL) || defined(_WANT_SYSVSHM_INTERNALS) /* * 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) */ }; struct vm_object; /* * 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 vm_object *object; struct label *label; /* MAC label */ struct ucred *cred; /* creator's credendials */ }; #endif 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; }; #ifdef _KERNEL struct proc; struct vmspace; struct vm_object; extern struct shminfo shminfo; #define SHMSEG_FREE 0x0200 #define SHMSEG_REMOVED 0x0400 #define SHMSEG_ALLOCATED 0x0800 void shmexit(struct vmspace *); void shmfork(struct proc *, struct proc *); void shmobjinfo(struct vm_object *obj, key_t *key, unsigned short *seq); int kern_get_shmsegs(struct thread *td, struct shmid_kernel **res, size_t *sz); #else /* !_KERNEL */ #include <sys/cdefs.h> #ifndef _SIZE_T_DECLARED typedef __size_t size_t; #define _SIZE_T_DECLARED #endif __BEGIN_DECLS 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_ */
