sysdeps/unix/sysv/irix4/bits/mman.h

   1 /* Definitions for BSD-style memory management.  Irix 4 version.
   2    Copyright (C) 1994, 1995, 1996, 1997, 1998 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 _BITS_MMAN_H
  21 #define _BITS_MMAN_H    1
  22
  23 /* Protections are chosen from these bits, OR'd together.  The
  24    implementation does not necessarily support PROT_EXEC or PROT_WRITE
  25    without PROT_READ.  The only guarantees are that no writing will be
  26    allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
  27
  28 #define PROT_NONE        0x00   /* No access.  */
  29 #define PROT_READ        0x04   /* Pages can be read.  */
  30 #define PROT_WRITE       0x02   /* Pages can be written.  */
  31 #define PROT_EXEC        0x01   /* Pages can be executed.  */
  32 #ifdef __USE_MISC
  33 # define PROT_EXECUTE    PROT_EXEC
  34 #endif
  35
  36 /* Sharing types (must choose one and only one of these).  */
  37 #define MAP_SHARED       0x01   /* Share changes.  */
  38 #define MAP_PRIVATE      0x02   /* Changes private; copy pages on write.  */
  39 #ifdef __USE_BSD
  40 # define MAP_TYPE        0x0f   /* Mask for sharing type.  */
  41 #endif
  42
  43 /* Other flags.  */
  44 #define MAP_FIXED        0x10   /* Map address must be exactly as requested. */
  45 #ifdef __USE_MISC
  46 # define MAP_RENAME      0x20   /* Rename private pages to file.  */
  47 # define MAP_AUTOGROW    0x40   /* Grow file as pages are written.  */
  48 # define MAP_LOCAL       0x80   /* Copy the mapped region on fork.  */
  49 #endif
  50
  51 /* Advice to `madvise'.  */
  52 #ifdef __USE_BSD
  53 # define MADV_NORMAL     0      /* No further special treatment.  */
  54 # define MADV_RANDOM     1      /* Expect random page references.  */
  55 # define MADV_SEQUENTIAL 2      /* Expect sequential page references.  */
  56 # define MADV_WILLNEED   3      /* Will need these pages.  */
  57 # define MADV_DONTNEED   4      /* Don't need these pages.  */
  58 #endif
  59
  60 /* Flags to `msync'.  */
  61 #define MS_ASYNC         0x1            /* Return immediately, don't fsync.  */
  62 #define MS_INVALIDATE    0x2            /* Invalidate caches.  */
  63
  64 #endif /* bits/mman.h */