1 /*- 2 * Copyright (c) 1982, 1986 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)mman.h 7.4 (Berkeley) 02/22/91 8 */ 9 10 /* 11 * Protections are chosen from these bits, or-ed together 12 */ 13 #define PROT_READ 0x04 /* pages can be read */ 14 #define PROT_WRITE 0x02 /* pages can be written */ 15 #define PROT_EXEC 0x01 /* pages can be executed */ 16 17 /* 18 * Flags contain mapping type, sharing type and options. 19 * Mapping type; choose one 20 */ 21 #define MAP_FILE 0x0001 /* mapped from a file or device */ 22 #define MAP_ANON 0x0002 /* allocated from memory, swap space */ 23 #define MAP_TYPE 0x000f /* mask for type field */ 24 25 /* 26 * Sharing types; choose one 27 */ 28 #define MAP_COPY 0x0020 /* "copy" region at mmap time */ 29 #define MAP_SHARED 0x0010 /* share changes */ 30 #define MAP_PRIVATE 0x0000 /* changes are private */ 31 32 /* 33 * Other flags 34 */ 35 #define MAP_FIXED 0x0100 /* map addr must be exactly as requested */ 36 #define MAP_NOEXTEND 0x0200 /* for MAP_FILE, don't change file size */ 37 #define MAP_HASSEMPHORE 0x0400 /* region may contain semaphores */ 38 #define MAP_INHERIT 0x0800 /* region is retained after exec */ 39 40 /* 41 * Advice to madvise 42 */ 43 #define MADV_NORMAL 0 /* no further special treatment */ 44 #define MADV_RANDOM 1 /* expect random page references */ 45 #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 46 #define MADV_WILLNEED 3 /* will need these pages */ 47 #define MADV_DONTNEED 4 /* dont need these pages */ 48 49 #ifndef KERNEL 50 51 #include <sys/cdefs.h> 52 53 __BEGIN_DECLS 54 /* Some of these int's should probably be size_t's */ 55 int mmap __P((caddr_t, int, int, int, int, off_t)); 56 int mprotect __P((caddr_t, int, int)); 57 int munmap __P((caddr_t, int)); 58 int msync __P((caddr_t, int)); 59 __END_DECLS 60 61 #endif /* !KERNEL */ 62