mono/utils/mono-mmap-windows-uwp.c

   1 /*
   2  * mono-dl-windows-uwp.c: UWP dl support for Mono.
   3  *
   4  * Copyright 2016 Microsoft
   5  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   6 */
   7 #include <config.h>
   8 #include <glib.h>
   9 #include "mono/utils/mono-compiler.h"
  10
  11 #if G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT)
  12 #include <windows.h>
  13 #include <mono/utils/mono-mmap-windows-internals.h>
  14
  15 void*
  16 mono_file_map (size_t length, int flags, int fd, guint64 offset, void **ret_handle)
  17 {
  18         void *ptr;
  19         int mflags = 0;
  20         HANDLE file, mapping;
  21         int prot = mono_mmap_win_prot_from_flags (flags);
  22
  23         mflags = FILE_MAP_READ;
  24         if (flags & MONO_MMAP_WRITE)
  25                 mflags = FILE_MAP_COPY;
  26
  27         file = (HANDLE) _get_osfhandle (fd);
  28         mapping = CreateFileMappingFromApp (file, NULL, prot, length, NULL);
  29
  30         if (mapping == NULL)
  31                 return NULL;
  32
  33         ptr = MapViewOfFileFromApp (mapping, mflags, offset, length);
  34
  35         if (ptr == NULL) {
  36                 CloseHandle (mapping);
  37                 return NULL;
  38         }
  39
  40         *ret_handle = (void*)mapping;
  41         return ptr;
  42 }
  43
  44 int
  45 mono_file_unmap (void *addr, void *handle)
  46 {
  47         UnmapViewOfFile (addr);
  48         CloseHandle ((HANDLE)handle);
  49         return 0;
  50 }
  51
  52 #else /* G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT) */
  53
  54 MONO_EMPTY_SOURCE_FILE (mono_mmap_windows_uwp);
  55 #endif /* G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT) */