1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #ifndef _SYS_SHM_H 36 #define _SYS_SHM_H 37 38 #pragma ident "%Z%%M% %I% %E% SMI" 39 40 #include <sys/ipc.h> 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 /* 47 * IPC Shared Memory Facility. 48 */ 49 50 /* 51 * Implementation Constants. 52 */ 53 #if (defined(_KERNEL) || defined(_KMEMUSER)) 54 55 #define SHMLBA PAGESIZE /* segment low boundary address multiple */ 56 /* (SHMLBA must be a power of 2) */ 57 #else 58 #include <sys/unistd.h> /* needed for _SC_PAGESIZE */ 59 extern long _sysconf(int); /* System Private interface to sysconf() */ 60 #define SHMLBA (_sysconf(_SC_PAGESIZE)) 61 #endif /* defined(_KERNEL) || defined(_KMEMUSER)) */ 62 63 /* 64 * Permission Definitions. 65 */ 66 #define SHM_R 0400 /* read permission */ 67 #define SHM_W 0200 /* write permission */ 68 69 /* 70 * Message Operation Flags. 71 */ 72 #define SHM_RDONLY 010000 /* attach read-only (else read-write) */ 73 #define SHM_RND 020000 /* round attach address to SHMLBA */ 74 #define SHM_SHARE_MMU 040000 /* share VM resources such as page table */ 75 #define SHM_PAGEABLE 0100000 /* pageable ISM */ 76 77 /* 78 * Valid flags bits for shmat shmflag argument. 79 */ 80 #define SHMAT_VALID_FLAGS_MASK \ 81 (SHM_R | SHM_W | SHM_RDONLY | SHM_RND | SHM_SHARE_MMU | SHM_PAGEABLE) 82 83 typedef unsigned long shmatt_t; 84 85 /* 86 * Structure Definitions. 87 */ 88 struct shmid_ds { 89 struct ipc_perm shm_perm; /* operation permission struct */ 90 size_t shm_segsz; /* size of segment in bytes */ 91 #if defined(_LP64) || defined(_XOPEN_SOURCE) 92 void *shm_amp; 93 #else 94 struct anon_map *shm_amp; /* segment anon_map pointer */ 95 #endif 96 ushort_t shm_lkcnt; /* number of times it is being locked */ 97 pid_t shm_lpid; /* pid of last shmop */ 98 pid_t shm_cpid; /* pid of creator */ 99 shmatt_t shm_nattch; /* number of attaches */ 100 ulong_t shm_cnattch; /* number of ISM attaches */ 101 #if defined(_LP64) 102 time_t shm_atime; /* last shmat time */ 103 time_t shm_dtime; /* last shmdt time */ 104 time_t shm_ctime; /* last change time */ 105 int64_t shm_pad4[4]; /* reserve area */ 106 #else /* _LP64 */ 107 time_t shm_atime; /* last shmat time */ 108 int32_t shm_pad1; /* reserved for time_t expansion */ 109 time_t shm_dtime; /* last shmdt time */ 110 int32_t shm_pad2; /* reserved for time_t expansion */ 111 time_t shm_ctime; /* last change time */ 112 int32_t shm_pad3; /* reserved for time_t expansion */ 113 int32_t shm_pad4[4]; /* reserve area */ 114 #endif /* _LP64 */ 115 }; 116 117 /* 118 * Shared memory control operations 119 */ 120 #define SHM_LOCK 3 /* Lock segment in core */ 121 #define SHM_UNLOCK 4 /* Unlock segment */ 122 123 #if !defined(_KERNEL) 124 #if defined(__STDC__) 125 int shmget(key_t, size_t, int); 126 int shmids(int *, uint_t, uint_t *); 127 int shmctl(int, int, struct shmid_ds *); 128 void *shmat(int, const void *, int); 129 #if defined(_XPG4) 130 int shmdt(const void *); 131 #else 132 int shmdt(char *); 133 #endif /* defined(_XPG4) */ 134 #else /* __STDC__ */ 135 int shmctl(); 136 int shmget(); 137 int shmids(); 138 void *shmat(); 139 int shmdt(); 140 #endif /* __STDC__ */ 141 #endif /* !defined(_KERNEL) */ 142 143 #ifdef __cplusplus 144 } 145 #endif 146 147 #endif /* _SYS_SHM_H */ 148