sysdeps/unix/bsd/bsd4.4/kfreebsd/bits/mman.h

   1 /* Definitions for POSIX memory map interface.  FreeBSD version.
   2    Copyright (C) 1994-1998, 2000-2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _SYS_MMAN_H
  21 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
  22 #endif
  23
  24 #include <features.h>
  25 #include <stddef.h>
  26
  27 /* Protections are chosen from these bits, OR'd together.  The
  28    implementation does not necessarily support PROT_EXEC or PROT_WRITE
  29    without PROT_READ.  The only guarantees are that no writing will be
  30    allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
  31
  32 #define PROT_NONE        0x00   /* No access.  */
  33 #define PROT_READ        0x01   /* Pages can be read.  */
  34 #define PROT_WRITE       0x02   /* Pages can be written.  */
  35 #define PROT_EXEC        0x04   /* Pages can be executed.  */
  36
  37 /* Flags contain mapping type, sharing type and options.  */
  38
  39 /* Mapping type (must choose one and only one of these).  */
  40 #ifdef __USE_MISC
  41 # define MAP_FILE        0x0000 /* Mapped from a file or device.  */
  42 # define MAP_ANON        0x1000 /* Allocated from anonymous virtual memory.  */
  43 # define MAP_TYPE        0x1000 /* Mask for type field.  */
  44 # ifdef __USE_MISC
  45 #  define MAP_ANONYMOUS  MAP_ANON /* Linux name. */
  46 # endif
  47 #endif
  48
  49 /* Sharing types (must choose one and only one of these).  */
  50 #define MAP_SHARED       0x0001 /* Share changes.  */
  51 #define MAP_PRIVATE      0x0002 /* Changes private; copy pages on write.  */
  52 #ifdef __USE_MISC
  53 # define MAP_COPY MAP_PRIVATE   /* Virtual copy of region at mapping time.  */
  54 #endif
  55
  56 /* Other flags.  */
  57 #define MAP_FIXED        0x0010 /* Map address must be exactly as requested. */
  58 #ifdef __USE_MISC
  59 #define MAP_RENAME       0x0020 /* Sun: rename private pages to file */
  60 #define MAP_NORESERVE    0x0040 /* Sun: don't reserve needed swap area */
  61 #define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
  62 #define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
  63 # define MAP_HASSEMPHORE 0x0200 /* Region may contain semaphores.  */
  64 # define MAP_STACK       0x0400 /* Region grows down, like a stack.  */
  65 # define MAP_NOSYNC      0x0800 /* Try to avoid flushing to the disk.  */
  66 # define MAP_NOCORE     0x20000 /* Don't include these pages in a core dump.  */
  67 #endif
  68
  69 /* Advice to `madvise'.  */
  70 #ifdef __USE_MISC
  71 # define MADV_NORMAL     0      /* No further special treatment.  */
  72 # define MADV_RANDOM     1      /* Expect random page references.  */
  73 # define MADV_SEQUENTIAL 2      /* Expect sequential page references.  */
  74 # define MADV_WILLNEED   3      /* Will need these pages.  */
  75 # define MADV_DONTNEED   4      /* Don't need these pages.  */
  76 # define MADV_FREE       5      /* Don't need these pages, they contain junk. */
  77 # define MADV_NOSYNC     6      /* Try to avoid flushing to the disk.  */
  78 # define MADV_AUTOSYNC   7      /* Use the default flushing strategy.  */
  79 # define MADV_NOCORE     8      /* Don't include these pages in a core dump.  */
  80 # define MADV_CORE       9      /* Include pages in a core dump (default).  */
  81 # define MADV_PROTECT   10      /* protect process from pageout kill */
  82 #endif
  83
  84 /* The POSIX people had to invent similar names for the same things.  */
  85 #ifdef __USE_XOPEN2K
  86 # define POSIX_MADV_NORMAL      0 /* No further special treatment.  */
  87 # define POSIX_MADV_RANDOM      1 /* Expect random page references.  */
  88 # define POSIX_MADV_SEQUENTIAL  2 /* Expect sequential page references.  */
  89 # define POSIX_MADV_WILLNEED    3 /* Will need these pages.  */
  90 # define POSIX_MADV_DONTNEED    4 /* Don't need these pages.  */
  91 #endif
  92
  93 /* Flags to `msync'.  */
  94 #define MS_ASYNC        1               /* Sync memory asynchronously.  */
  95 #define MS_SYNC         0               /* Synchronous memory sync.  */
  96 #define MS_INVALIDATE   2               /* Invalidate the caches.  */
  97
  98 /* Flags for `mlockall' (can be OR'd together).  */
  99 #define MCL_CURRENT     1               /* Lock all currently mapped pages.  */
 100 #define MCL_FUTURE      2               /* Lock all additions to address
 101                                            space.  */
 102
 103 /* Flags for 'minherit'.  */
 104 #ifdef __USE_MISC
 105 # define INHERIT_SHARE  0
 106 # define INHERIT_COPY   1
 107 # define INHERIT_NONE   2
 108 #endif
 109
 110
 111 /*
 112  * Return bits from mincore
 113  */
 114 #ifdef __USE_MISC
 115 #define MINCORE_INCORE           0x1 /* Page is incore */
 116 #define MINCORE_REFERENCED       0x2 /* Page has been referenced by us */
 117 #define MINCORE_MODIFIED         0x4 /* Page has been modified by us */
 118 #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
 119 #define MINCORE_MODIFIED_OTHER  0x10 /* Page has been modified */
 120 #endif /* Use MISC */
 121
 122 #ifdef __USE_MISC
 123
 124 __BEGIN_DECLS
 125
 126 extern int minherit (void *__addr, size_t __len, int __inherit);
 127
 128 __END_DECLS
 129
 130 #endif /* Use BSD */