mman.h revision 82295
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)mman.h 8.2 (Berkeley) 1/9/95 34 * $FreeBSD: head/sys/sys/mman.h 82295 2001-08-24 19:48:07Z dillon $ 35 */ 36 37#ifndef _SYS_MMAN_H_ 38#define _SYS_MMAN_H_ 39 40#include <sys/_posix.h> 41 42/* 43 * Inheritance for minherit() 44 */ 45#define INHERIT_SHARE 0 46#define INHERIT_COPY 1 47#define INHERIT_NONE 2 48 49/* 50 * Protections are chosen from these bits, or-ed together 51 */ 52#define PROT_NONE 0x00 /* no permissions */ 53#define PROT_READ 0x01 /* pages can be read */ 54#define PROT_WRITE 0x02 /* pages can be written */ 55#define PROT_EXEC 0x04 /* pages can be executed */ 56 57/* 58 * Flags contain sharing type and options. 59 * Sharing types; choose one. 60 */ 61#define MAP_SHARED 0x0001 /* share changes */ 62#define MAP_PRIVATE 0x0002 /* changes are private */ 63#define MAP_COPY MAP_PRIVATE /* Obsolete */ 64 65/* 66 * Other flags 67 */ 68#define MAP_FIXED 0x0010 /* map addr must be exactly as requested */ 69#define MAP_RENAME 0x0020 /* Sun: rename private pages to file */ 70#define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */ 71#define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */ 72#define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */ 73#define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */ 74#define MAP_STACK 0x0400 /* region grows down, like a stack */ 75#define MAP_NOSYNC 0x0800 /* page to but do not sync underlying file */ 76 77/* 78 * Extended flags 79 */ 80#define MAP_NOCORE 0x00020000 /* dont include these pages in a coredump */ 81 82#ifdef _P1003_1B_VISIBLE 83/* 84 * Process memory locking 85 */ 86#define MCL_CURRENT 0x0001 /* Lock only current memory */ 87#define MCL_FUTURE 0x0002 /* Lock all future memory as well */ 88 89#endif /* _P1003_1B_VISIBLE */ 90 91/* 92 * Error return from mmap() 93 */ 94#define MAP_FAILED ((void *)-1) 95 96/* 97 * msync() flags 98 */ 99#define MS_SYNC 0x0000 /* msync synchronously */ 100#define MS_ASYNC 0x0001 /* return immediately */ 101#define MS_INVALIDATE 0x0002 /* invalidate all cached data */ 102 103 104/* 105 * Mapping type 106 */ 107#define MAP_FILE 0x0000 /* map from file (default) */ 108#define MAP_ANON 0x1000 /* allocated from memory, swap space */ 109 110/* 111 * Advice to madvise 112 */ 113#define MADV_NORMAL 0 /* no further special treatment */ 114#define MADV_RANDOM 1 /* expect random page references */ 115#define MADV_SEQUENTIAL 2 /* expect sequential page references */ 116#define MADV_WILLNEED 3 /* will need these pages */ 117#define MADV_DONTNEED 4 /* dont need these pages */ 118#define MADV_FREE 5 /* dont need these pages, and junk contents */ 119#define MADV_NOSYNC 6 /* try to avoid flushes to physical media */ 120#define MADV_AUTOSYNC 7 /* revert to default flushing strategy */ 121#define MADV_NOCORE 8 /* do not include these pages in a core file */ 122#define MADV_CORE 9 /* revert to including pages in a core file */ 123 124/* 125 * Return bits from mincore 126 */ 127#define MINCORE_INCORE 0x1 /* Page is incore */ 128#define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */ 129#define MINCORE_MODIFIED 0x4 /* Page has been modified by us */ 130#define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */ 131#define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */ 132 133#ifndef _KERNEL 134 135#include <sys/cdefs.h> 136 137__BEGIN_DECLS 138#ifdef _P1003_1B_VISIBLE 139int mlockall __P((int)); 140int munlockall __P((void)); 141int shm_open __P((const char *, int, mode_t)); 142int shm_unlink __P((const char *)); 143#endif /* _P1003_1B_VISIBLE */ 144int mlock __P((const void *, size_t)); 145#ifndef _MMAP_DECLARED 146#define _MMAP_DECLARED 147void * mmap __P((void *, size_t, int, int, int, off_t)); 148#endif 149int mprotect __P((const void *, size_t, int)); 150int msync __P((void *, size_t, int)); 151int munlock __P((const void *, size_t)); 152int munmap __P((void *, size_t)); 153#ifndef _POSIX_SOURCE 154int madvise __P((void *, size_t, int)); 155int mincore __P((const void *, size_t, char *)); 156int minherit __P((void *, size_t, int)); 157#endif 158__END_DECLS 159 160#endif /* !_KERNEL */ 161 162#endif 163