1 /* $FreeBSD$ */ 2 /* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 Adam Glass 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Adam Glass. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * As defined+described in "X/Open System Interfaces and Headers" 36 * Issue 4, p. XXX 37 */ 38 39 #ifndef _SYS_SHM_H_ 40 #define _SYS_SHM_H_ 41 42 #include <sys/cdefs.h> 43 #include <sys/ipc.h> 44 #include <sys/_types.h> 45 46 #define SHM_RDONLY 010000 /* Attach read-only (else read-write) */ 47 #define SHM_RND 020000 /* Round attach address to SHMLBA */ 48 #define SHMLBA PAGE_SIZE /* Segment low boundary address multiple */ 49 50 /* "official" access mode definitions; somewhat braindead since you have 51 to specify (SHM_* >> 3) for group and (SHM_* >> 6) for world permissions */ 52 #define SHM_R (IPC_R) 53 #define SHM_W (IPC_W) 54 55 /* predefine tbd *LOCK shmctl commands */ 56 #define SHM_LOCK 11 57 #define SHM_UNLOCK 12 58 59 /* ipcs shmctl commands for Linux compatability */ 60 #define SHM_STAT 13 61 #define SHM_INFO 14 62 63 #ifndef _PID_T_DECLARED 64 typedef __pid_t pid_t; 65 #define _PID_T_DECLARED 66 #endif 67 68 #ifndef _TIME_T_DECLARED 69 typedef __time_t time_t; 70 #define _TIME_T_DECLARED 71 #endif 72 73 #ifndef _SIZE_T_DECLARED 74 typedef __size_t size_t; 75 #define _SIZE_T_DECLARED 76 #endif 77 78 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 79 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) 80 struct shmid_ds_old { 81 struct ipc_perm_old shm_perm; /* operation permission structure */ 82 int shm_segsz; /* size of segment in bytes */ 83 pid_t shm_lpid; /* process ID of last shared memory op */ 84 pid_t shm_cpid; /* process ID of creator */ 85 short shm_nattch; /* number of current attaches */ 86 time_t shm_atime; /* time of last shmat() */ 87 time_t shm_dtime; /* time of last shmdt() */ 88 time_t shm_ctime; /* time of last change by shmctl() */ 89 void *shm_internal; /* sysv stupidity */ 90 }; 91 #endif 92 93 struct shmid_ds { 94 struct ipc_perm shm_perm; /* operation permission structure */ 95 size_t shm_segsz; /* size of segment in bytes */ 96 pid_t shm_lpid; /* process ID of last shared memory op */ 97 pid_t shm_cpid; /* process ID of creator */ 98 int shm_nattch; /* number of current attaches */ 99 time_t shm_atime; /* time of last shmat() */ 100 time_t shm_dtime; /* time of last shmdt() */ 101 time_t shm_ctime; /* time of last change by shmctl() */ 102 }; 103 104 #ifdef _KERNEL 105 #include <vm/vm.h> 106 107 /* 108 * System 5 style catch-all structure for shared memory constants that 109 * might be of interest to user programs. Do we really want/need this? 110 */ 111 struct shminfo { 112 u_long shmmax; /* max shared memory segment size (bytes) */ 113 u_long shmmin; /* max shared memory segment size (bytes) */ 114 u_long shmmni; /* max number of shared memory identifiers */ 115 u_long shmseg; /* max shared memory segments per process */ 116 u_long shmall; /* max amount of shared memory (pages) */ 117 }; 118 119 /* 120 * Add a kernel wrapper to the shmid_ds struct so that private info (like the 121 * MAC label) can be added to it, without changing the user interface. 122 */ 123 struct shmid_kernel { 124 struct shmid_ds u; 125 vm_object_t object; 126 struct label *label; /* MAC label */ 127 }; 128 129 extern struct shminfo shminfo; 130 131 struct shm_info { 132 int used_ids; 133 unsigned long shm_tot; 134 unsigned long shm_rss; 135 unsigned long shm_swp; 136 unsigned long swap_attempts; 137 unsigned long swap_successes; 138 }; 139 140 struct thread; 141 struct proc; 142 struct vmspace; 143 144 void shmexit(struct vmspace *); 145 void shmfork(struct proc *, struct proc *); 146 #else /* !_KERNEL */ 147 148 #include <sys/cdefs.h> 149 150 #ifndef _SIZE_T_DECLARED 151 typedef __size_t size_t; 152 #define _SIZE_T_DECLARED 153 #endif 154 155 __BEGIN_DECLS 156 #ifdef __BSD_VISIBLE 157 int shmsys(int, ...); 158 #endif 159 void *shmat(int, const void *, int); 160 int shmget(key_t, size_t, int); 161 int shmctl(int, int, struct shmid_ds *); 162 int shmdt(const void *); 163 __END_DECLS 164 165 #endif /* !_KERNEL */ 166 167 #endif /* !_SYS_SHM_H_ */ 168