src/compat/mman.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2015-2016  Michael Jeanson <mjeanson@efficios.com>
   5  */
   6
   7 #ifndef _BABELTRACE_COMPAT_MMAN_H
   8 #define _BABELTRACE_COMPAT_MMAN_H
   9
  10 #ifdef __MINGW32__
  11
  12 #include <sys/types.h>
  13
  14 #define PROT_NONE       0x0
  15 #define PROT_READ       0x1
  16 #define PROT_WRITE      0x2
  17 #define PROT_EXEC       0x4
  18
  19 #define MAP_FILE        0
  20 #define MAP_SHARED      1
  21 #define MAP_PRIVATE     2
  22 #define MAP_TYPE        0xF
  23 #define MAP_FIXED       0x10
  24 #define MAP_ANONYMOUS   0x20
  25 #define MAP_ANON        MAP_ANONYMOUS
  26 #define MAP_FAILED      ((void *) -1)
  27
  28 /*
  29  * Note that some platforms (e.g. Windows) do not allow read-only
  30  * mappings to exceed the file's size (even within a page).
  31  */
  32 void *bt_mmap(void *addr, size_t length, int prot, int flags, int fd,
  33         off_t offset, int log_level);
  34
  35 int bt_munmap(void *addr, size_t length);
  36
  37 /*
  38  * On Windows the memory mapping offset must be aligned to the memory
  39  * allocator allocation granularity and not the page size.
  40  */
  41 size_t bt_mmap_get_offset_align_size(int log_level);
  42
  43 #else /* __MINGW32__ */
  44
  45 #include <sys/mman.h>
  46 #include "common/common.h"
  47
  48 static inline
  49 void *bt_mmap(void *addr, size_t length, int prot, int flags, int fd,
  50         off_t offset, int log_level)
  51 {
  52         return (void *) mmap(addr, length, prot, flags, fd, offset);
  53 }
  54
  55 static inline
  56 int bt_munmap(void *addr, size_t length)
  57 {
  58         return munmap(addr, length);
  59 }
  60
  61 /*
  62  * On other platforms the memory mapping offset must be aligned to the
  63  * page size.
  64  */
  65 static inline
  66 size_t bt_mmap_get_offset_align_size(int log_level)
  67 {
  68         return bt_common_get_page_size(log_level);
  69 }
  70 #endif /* __MINGW32__ */
  71
  72 #ifndef MAP_ANONYMOUS
  73 # ifdef MAP_ANON
  74 #   define MAP_ANONYMOUS MAP_ANON
  75 # endif
  76 #endif
  77
  78 #endif /* _BABELTRACE_COMPAT_MMAN_H */