modernc.org/cc@v1.0.1/v2/headers/linux_386/usr/include/i386-linux-gnu/bits/mman-linux.h (about)

     1  /* Definitions for POSIX memory map interface.  Linux generic version.
     2     Copyright (C) 2001-2018 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, see
    17     <http://www.gnu.org/licenses/>.  */
    18  
    19  #ifndef _SYS_MMAN_H
    20  # error "Never use <bits/mman-linux.h> directly; include <sys/mman.h> instead."
    21  #endif
    22  
    23  /* The following definitions basically come from the kernel headers.
    24     But the kernel header is not namespace clean.  */
    25  
    26  /* Protections are chosen from these bits, OR'd together.  The
    27     implementation does not necessarily support PROT_EXEC or PROT_WRITE
    28     without PROT_READ.  The only guarantees are that no writing will be
    29     allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
    30  
    31  #define PROT_READ	0x1	/* Page can be read.  */
    32  #define PROT_WRITE	0x2	/* Page can be written.  */
    33  #define PROT_EXEC	0x4	/* Page can be executed.  */
    34  #define PROT_NONE	0x0	/* Page can not be accessed.  */
    35  #define PROT_GROWSDOWN	0x01000000	/* Extend change to start of
    36  					   growsdown vma (mprotect only).  */
    37  #define PROT_GROWSUP	0x02000000	/* Extend change to start of
    38  					   growsup vma (mprotect only).  */
    39  
    40  /* Sharing types (must choose one and only one of these).  */
    41  #define MAP_SHARED	0x01	/* Share changes.  */
    42  #define MAP_PRIVATE	0x02	/* Changes are private.  */
    43  #ifdef __USE_MISC
    44  # define MAP_TYPE	0x0f	/* Mask for type of mapping.  */
    45  #endif
    46  
    47  /* Other flags.  */
    48  #define MAP_FIXED	0x10	/* Interpret addr exactly.  */
    49  #ifdef __USE_MISC
    50  # define MAP_FILE	0
    51  # ifdef __MAP_ANONYMOUS
    52  #  define MAP_ANONYMOUS	__MAP_ANONYMOUS	/* Don't use a file.  */
    53  # else
    54  #  define MAP_ANONYMOUS	0x20	/* Don't use a file.  */
    55  # endif
    56  # define MAP_ANON	MAP_ANONYMOUS
    57  /* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.  */
    58  # define MAP_HUGE_SHIFT	26
    59  # define MAP_HUGE_MASK	0x3f
    60  #endif
    61  
    62  /* Flags to `msync'.  */
    63  #define MS_ASYNC	1	/* Sync memory asynchronously.  */
    64  #define MS_SYNC		4	/* Synchronous memory sync.  */
    65  #define MS_INVALIDATE	2	/* Invalidate the caches.  */
    66  
    67  /* Flags for `mremap'.  */
    68  #ifdef __USE_GNU
    69  # define MREMAP_MAYMOVE	1
    70  # define MREMAP_FIXED	2
    71  #endif
    72  
    73  /* Advice to `madvise'.  */
    74  #ifdef __USE_MISC
    75  # define MADV_NORMAL	  0	/* No further special treatment.  */
    76  # define MADV_RANDOM	  1	/* Expect random page references.  */
    77  # define MADV_SEQUENTIAL  2	/* Expect sequential page references.  */
    78  # define MADV_WILLNEED	  3	/* Will need these pages.  */
    79  # define MADV_DONTNEED	  4	/* Don't need these pages.  */
    80  # define MADV_FREE	  8	/* Free pages only if memory pressure.  */
    81  # define MADV_REMOVE	  9	/* Remove these pages and resources.  */
    82  # define MADV_DONTFORK	  10	/* Do not inherit across fork.  */
    83  # define MADV_DOFORK	  11	/* Do inherit across fork.  */
    84  # define MADV_MERGEABLE	  12	/* KSM may merge identical pages.  */
    85  # define MADV_UNMERGEABLE 13	/* KSM may not merge identical pages.  */
    86  # define MADV_HUGEPAGE	  14	/* Worth backing with hugepages.  */
    87  # define MADV_NOHUGEPAGE  15	/* Not worth backing with hugepages.  */
    88  # define MADV_DONTDUMP	  16	/* Explicity exclude from the core dump,
    89  				   overrides the coredump filter bits.  */
    90  # define MADV_DODUMP	  17	/* Clear the MADV_DONTDUMP flag.  */
    91  # define MADV_WIPEONFORK  18	/* Zero memory on fork, child only.  */
    92  # define MADV_KEEPONFORK  19	/* Undo MADV_WIPEONFORK.  */
    93  # define MADV_HWPOISON	  100	/* Poison a page for testing.  */
    94  #endif
    95  
    96  /* The POSIX people had to invent similar names for the same things.  */
    97  #ifdef __USE_XOPEN2K
    98  # define POSIX_MADV_NORMAL	0	/* No further special treatment.  */
    99  # define POSIX_MADV_RANDOM	1	/* Expect random page references.  */
   100  # define POSIX_MADV_SEQUENTIAL	2	/* Expect sequential page references.  */
   101  # define POSIX_MADV_WILLNEED	3	/* Will need these pages.  */
   102  # define POSIX_MADV_DONTNEED	4	/* Don't need these pages.  */
   103  #endif
   104  
   105  /* Flags for `mlockall'.  */
   106  #ifndef MCL_CURRENT
   107  # define MCL_CURRENT	1	/* Lock all currently mapped pages.  */
   108  # define MCL_FUTURE	2	/* Lock all additions to address
   109  				   space.  */
   110  # define MCL_ONFAULT	4	/* Lock all pages that are
   111  				   faulted in.  */
   112  #endif
   113  
   114  #include <bits/mman-shared.h>