modernc.org/cc@v1.0.1/v2/headers/linux_arm/usr/include/arm-linux-gnueabihf/bits/mman-linux.h (about)

     1  /* Definitions for POSIX memory map interface.  Linux generic version.
     2     Copyright (C) 2001-2016 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     This file is also used by some non-Linux configurations of the
    27     GNU C Library, for other systems that use these same bit values.  */
    28  
    29  /* Protections are chosen from these bits, OR'd together.  The
    30     implementation does not necessarily support PROT_EXEC or PROT_WRITE
    31     without PROT_READ.  The only guarantees are that no writing will be
    32     allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
    33  
    34  #define PROT_READ	0x1	/* Page can be read.  */
    35  #define PROT_WRITE	0x2	/* Page can be written.  */
    36  #define PROT_EXEC	0x4	/* Page can be executed.  */
    37  #define PROT_NONE	0x0	/* Page can not be accessed.  */
    38  #define PROT_GROWSDOWN	0x01000000	/* Extend change to start of
    39  					   growsdown vma (mprotect only).  */
    40  #define PROT_GROWSUP	0x02000000	/* Extend change to start of
    41  					   growsup vma (mprotect only).  */
    42  
    43  /* Sharing types (must choose one and only one of these).  */
    44  #define MAP_SHARED	0x01	/* Share changes.  */
    45  #define MAP_PRIVATE	0x02	/* Changes are private.  */
    46  #ifdef __USE_MISC
    47  #define MAP_TYPE	0x0f	/* Mask for type of mapping.  */
    48  #endif
    49  
    50  /* Other flags.  */
    51  #define MAP_FIXED	0x10	/* Interpret addr exactly.  */
    52  #ifdef __USE_MISC
    53  #define MAP_FILE	0
    54  #ifdef __MAP_ANONYMOUS
    55  #define MAP_ANONYMOUS	__MAP_ANONYMOUS	/* Don't use a file.  */
    56  #else
    57  #define MAP_ANONYMOUS	0x20	/* Don't use a file.  */
    58  #endif
    59  #define MAP_ANON	MAP_ANONYMOUS
    60  /* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.  */
    61  #define MAP_HUGE_SHIFT	26
    62  #define MAP_HUGE_MASK	0x3f
    63  #endif
    64  
    65  /* Flags to `msync'.  */
    66  #define MS_ASYNC	1	/* Sync memory asynchronously.  */
    67  #define MS_SYNC		4	/* Synchronous memory sync.  */
    68  #define MS_INVALIDATE	2	/* Invalidate the caches.  */
    69  
    70  /* Flags for `mremap'.  */
    71  #ifdef __USE_GNU
    72  #define MREMAP_MAYMOVE	1
    73  #define MREMAP_FIXED	2
    74  #endif
    75  
    76  /* Advice to `madvise'.  */
    77  #ifdef __USE_MISC
    78  #define MADV_NORMAL	  0	/* No further special treatment.  */
    79  #define MADV_RANDOM	  1	/* Expect random page references.  */
    80  #define MADV_SEQUENTIAL  2	/* Expect sequential page references.  */
    81  #define MADV_WILLNEED	  3	/* Will need these pages.  */
    82  #define MADV_DONTNEED	  4	/* Don't need these pages.  */
    83  #define MADV_FREE	  8	/* Free pages only if memory pressure.  */
    84  #define MADV_REMOVE	  9	/* Remove these pages and resources.  */
    85  #define MADV_DONTFORK	  10	/* Do not inherit across fork.  */
    86  #define MADV_DOFORK	  11	/* Do inherit across fork.  */
    87  #define MADV_MERGEABLE	  12	/* KSM may merge identical pages.  */
    88  #define MADV_UNMERGEABLE 13	/* KSM may not merge identical pages.  */
    89  #define MADV_HUGEPAGE	  14	/* Worth backing with hugepages.  */
    90  #define MADV_NOHUGEPAGE  15	/* Not worth backing with hugepages.  */
    91  #define MADV_DONTDUMP	  16	/* Explicity exclude from the core dump,
    92  				   overrides the coredump filter bits.  */
    93  #define MADV_DODUMP	  17	/* Clear the MADV_DONTDUMP flag.  */
    94  #define MADV_HWPOISON	  100	/* Poison a page for testing.  */
    95  #endif
    96  
    97  /* The POSIX people had to invent similar names for the same things.  */
    98  #ifdef __USE_XOPEN2K
    99  #define POSIX_MADV_NORMAL	0	/* No further special treatment.  */
   100  #define POSIX_MADV_RANDOM	1	/* Expect random page references.  */
   101  #define POSIX_MADV_SEQUENTIAL	2	/* Expect sequential page references.  */
   102  #define POSIX_MADV_WILLNEED	3	/* Will need these pages.  */
   103  #define POSIX_MADV_DONTNEED	4	/* Don't need these pages.  */
   104  #endif
   105  
   106  /* Flags for `mlockall'.  */
   107  #ifndef MCL_CURRENT
   108  #define MCL_CURRENT	1	/* Lock all currently mapped pages.  */
   109  #define MCL_FUTURE	2	/* Lock all additions to address
   110  				   space.  */
   111  #define MCL_ONFAULT	4	/* Lock all pages that are
   112  				   faulted in.  */
   113  #endif