mman.h revision 225736
1/*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)mman.h 8.2 (Berkeley) 1/9/95 30 * $FreeBSD: stable/9/sys/sys/mman.h 211937 2010-08-28 16:57:07Z alc $ 31 */ 32 33#ifndef _SYS_MMAN_H_ 34#define _SYS_MMAN_H_ 35 36#include <sys/cdefs.h> 37#include <sys/_types.h> 38 39#if __BSD_VISIBLE 40/* 41 * Inheritance for minherit() 42 */ 43#define INHERIT_SHARE 0 44#define INHERIT_COPY 1 45#define INHERIT_NONE 2 46#endif 47 48/* 49 * Protections are chosen from these bits, or-ed together 50 */ 51#define PROT_NONE 0x00 /* no permissions */ 52#define PROT_READ 0x01 /* pages can be read */ 53#define PROT_WRITE 0x02 /* pages can be written */ 54#define PROT_EXEC 0x04 /* pages can be executed */ 55 56/* 57 * Flags contain sharing type and options. 58 * Sharing types; choose one. 59 */ 60#define MAP_SHARED 0x0001 /* share changes */ 61#define MAP_PRIVATE 0x0002 /* changes are private */ 62#if __BSD_VISIBLE 63#define MAP_COPY MAP_PRIVATE /* Obsolete */ 64#endif 65 66/* 67 * Other flags 68 */ 69#define MAP_FIXED 0x0010 /* map addr must be exactly as requested */ 70 71#if __BSD_VISIBLE 72#define MAP_RENAME 0x0020 /* Sun: rename private pages to file */ 73#define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */ 74#define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */ 75#define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */ 76#define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */ 77#define MAP_STACK 0x0400 /* region grows down, like a stack */ 78#define MAP_NOSYNC 0x0800 /* page to but do not sync underlying file */ 79 80/* 81 * Mapping type 82 */ 83#define MAP_FILE 0x0000 /* map from file (default) */ 84#define MAP_ANON 0x1000 /* allocated from memory, swap space */ 85#ifndef _KERNEL 86#define MAP_ANONYMOUS MAP_ANON /* For compatibility. */ 87#endif /* !_KERNEL */ 88 89/* 90 * Extended flags 91 */ 92#define MAP_NOCORE 0x00020000 /* dont include these pages in a coredump */ 93#define MAP_PREFAULT_READ 0x00040000 /* prefault mapping for reading */ 94#endif /* __BSD_VISIBLE */ 95 96#if __POSIX_VISIBLE >= 199309 97/* 98 * Process memory locking 99 */ 100#define MCL_CURRENT 0x0001 /* Lock only current memory */ 101#define MCL_FUTURE 0x0002 /* Lock all future memory as well */ 102#endif 103 104/* 105 * Error return from mmap() 106 */ 107#define MAP_FAILED ((void *)-1) 108 109/* 110 * msync() flags 111 */ 112#define MS_SYNC 0x0000 /* msync synchronously */ 113#define MS_ASYNC 0x0001 /* return immediately */ 114#define MS_INVALIDATE 0x0002 /* invalidate all cached data */ 115 116/* 117 * Advice to madvise 118 */ 119#define _MADV_NORMAL 0 /* no further special treatment */ 120#define _MADV_RANDOM 1 /* expect random page references */ 121#define _MADV_SEQUENTIAL 2 /* expect sequential page references */ 122#define _MADV_WILLNEED 3 /* will need these pages */ 123#define _MADV_DONTNEED 4 /* dont need these pages */ 124 125#if __BSD_VISIBLE 126#define MADV_NORMAL _MADV_NORMAL 127#define MADV_RANDOM _MADV_RANDOM 128#define MADV_SEQUENTIAL _MADV_SEQUENTIAL 129#define MADV_WILLNEED _MADV_WILLNEED 130#define MADV_DONTNEED _MADV_DONTNEED 131#define MADV_FREE 5 /* dont need these pages, and junk contents */ 132#define MADV_NOSYNC 6 /* try to avoid flushes to physical media */ 133#define MADV_AUTOSYNC 7 /* revert to default flushing strategy */ 134#define MADV_NOCORE 8 /* do not include these pages in a core file */ 135#define MADV_CORE 9 /* revert to including pages in a core file */ 136#define MADV_PROTECT 10 /* protect process from pageout kill */ 137 138/* 139 * Return bits from mincore 140 */ 141#define MINCORE_INCORE 0x1 /* Page is incore */ 142#define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */ 143#define MINCORE_MODIFIED 0x4 /* Page has been modified by us */ 144#define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */ 145#define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */ 146#define MINCORE_SUPER 0x20 /* Page is a "super" page */ 147 148/* 149 * Anonymous object constant for shm_open(). 150 */ 151#define SHM_ANON ((char *)1) 152#endif /* __BSD_VISIBLE */ 153 154/* 155 * XXX missing POSIX_TYPED_MEM_* macros and 156 * posix_typed_mem_info structure. 157 */ 158#if __POSIX_VISIBLE >= 200112 159#define POSIX_MADV_NORMAL _MADV_NORMAL 160#define POSIX_MADV_RANDOM _MADV_RANDOM 161#define POSIX_MADV_SEQUENTIAL _MADV_SEQUENTIAL 162#define POSIX_MADV_WILLNEED _MADV_WILLNEED 163#define POSIX_MADV_DONTNEED _MADV_DONTNEED 164#endif 165 166#ifndef _MODE_T_DECLARED 167typedef __mode_t mode_t; 168#define _MODE_T_DECLARED 169#endif 170 171#ifndef _OFF_T_DECLARED 172typedef __off_t off_t; 173#define _OFF_T_DECLARED 174#endif 175 176#ifndef _SIZE_T_DECLARED 177typedef __size_t size_t; 178#define _SIZE_T_DECLARED 179#endif 180 181#ifdef _KERNEL 182#include <vm/vm.h> 183 184struct shmfd { 185 size_t shm_size; 186 vm_object_t shm_object; 187 int shm_refs; 188 uid_t shm_uid; 189 gid_t shm_gid; 190 mode_t shm_mode; 191 192 /* 193 * Values maintained solely to make this a better-behaved file 194 * descriptor for fstat() to run on. 195 */ 196 struct timespec shm_atime; 197 struct timespec shm_mtime; 198 struct timespec shm_ctime; 199 struct timespec shm_birthtime; 200 201 struct label *shm_label; /* MAC label */ 202}; 203 204int shm_mmap(struct shmfd *shmfd, vm_size_t objsize, vm_ooffset_t foff, 205 vm_object_t *obj); 206 207#else /* !_KERNEL */ 208 209__BEGIN_DECLS 210/* 211 * XXX not yet implemented: posix_mem_offset(), posix_typed_mem_get_info(), 212 * posix_typed_mem_open(). 213 */ 214#if __BSD_VISIBLE 215int getpagesizes(size_t *, int); 216int madvise(void *, size_t, int); 217int mincore(const void *, size_t, char *); 218int minherit(void *, size_t, int); 219#endif 220int mlock(const void *, size_t); 221#ifndef _MMAP_DECLARED 222#define _MMAP_DECLARED 223void * mmap(void *, size_t, int, int, int, off_t); 224#endif 225int mprotect(const void *, size_t, int); 226int msync(void *, size_t, int); 227int munlock(const void *, size_t); 228int munmap(void *, size_t); 229#if __POSIX_VISIBLE >= 200112 230int posix_madvise(void *, size_t, int); 231#endif 232#if __POSIX_VISIBLE >= 199309 233int mlockall(int); 234int munlockall(void); 235int shm_open(const char *, int, mode_t); 236int shm_unlink(const char *); 237#endif 238__END_DECLS 239 240#endif /* !_KERNEL */ 241 242#endif /* !_SYS_MMAN_H_ */ 243