mman.h 3.9 KB

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  1. /* Definitions for POSIX memory map interface. Linux/HPPA version.
  2. Copyright (C) 1997, 1998, 2000, 2003 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #ifndef _SYS_MMAN_H
  17. # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
  18. #endif
  19. /* these are basically taken from the kernel definitions */
  20. #define PROT_READ 0x1 /* page can be read */
  21. #define PROT_WRITE 0x2 /* page can be written */
  22. #define PROT_EXEC 0x4 /* page can be executed */
  23. #define PROT_NONE 0x0 /* page can not be accessed */
  24. #define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
  25. growsdown vma (mprotect only). */
  26. #define PROT_GROWSUP 0x02000000 /* Extend change to start of
  27. growsup vma (mprotect only). */
  28. #define MAP_SHARED 0x01 /* Share changes */
  29. #define MAP_PRIVATE 0x02 /* Changes are private */
  30. #define MAP_TYPE 0x03 /* Mask for type of mapping */
  31. #define MAP_FIXED 0x04 /* Interpret addr exactly */
  32. #define MAP_ANONYMOUS 0x10 /* don't use a file */
  33. #define MAP_DENYWRITE 0x0800 /* ETXTBSY */
  34. #define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
  35. #define MAP_LOCKED 0x2000 /* pages are locked */
  36. #define MAP_NORESERVE 0x4000 /* don't check for reservations */
  37. #define MAP_GROWSDOWN 0x8000 /* stack-like segment */
  38. #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */
  39. #define MAP_NONBLOCK 0x20000 /* do not block on IO */
  40. #define MAP_UNINITIALIZE 0x4000000 /* For anonymous mmap, memory could
  41. be uninitialized. */
  42. #define MS_SYNC 1 /* synchronous memory sync */
  43. #define MS_ASYNC 2 /* sync memory asynchronously */
  44. #define MS_INVALIDATE 4 /* invalidate the caches */
  45. #define MCL_CURRENT 1 /* lock all current mappings */
  46. #define MCL_FUTURE 2 /* lock all future mappings */
  47. /* Advice to "madvise" */
  48. #ifdef __USE_BSD
  49. # define MADV_NORMAL 0 /* no further special treatment */
  50. # define MADV_RANDOM 1 /* expect random page references */
  51. # define MADV_SEQUENTIAL 2 /* expect sequential page references */
  52. # define MADV_WILLNEED 3 /* will need these pages */
  53. # define MADV_DONTNEED 4 /* dont need these pages */
  54. # define MADV_SPACEAVAIL 5 /* insure that resources are reserved */
  55. # define MADV_VPS_PURGE 6 /* Purge pages from VM page cache */
  56. # define MADV_VPS_INHERIT 7 /* Inherit parents page size */
  57. # define MADV_REMOVE 9 /* Remove these pages and resources. */
  58. # define MADV_DONTFORK 10 /* Do not inherit across fork. */
  59. # define MADV_DOFORK 11 /* Do inherit across fork. */
  60. #endif
  61. /* The range 12-64 is reserved for page size specification. */
  62. #define MADV_4K_PAGES 12 /* Use 4K pages */
  63. #define MADV_16K_PAGES 14 /* Use 16K pages */
  64. #define MADV_64K_PAGES 16 /* Use 64K pages */
  65. #define MADV_256K_PAGES 18 /* Use 256K pages */
  66. #define MADV_1M_PAGES 20 /* Use 1 Megabyte pages */
  67. #define MADV_4M_PAGES 22 /* Use 4 Megabyte pages */
  68. #define MADV_16M_PAGES 24 /* Use 16 Megabyte pages */
  69. #define MADV_64M_PAGES 26 /* Use 64 Megabyte pages */
  70. /* compatibility flags */
  71. #define MAP_ANON MAP_ANONYMOUS
  72. #define MAP_FILE 0
  73. #define MAP_VARIABLE 0
  74. /* Flags for `mremap'. */
  75. #ifdef __USE_GNU
  76. # define MREMAP_MAYMOVE 1
  77. # define MREMAP_FIXED 2
  78. #endif