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