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gmodule: Add support for loading UWP packaged DLLs

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LoadLibrary() is not available when building for the Universal Windows
Platform, which is used for shipping apps to the Windows Store on all
devices (Windows Desktop, Windows Phone, Surface, XBox, etc).

Apps are not allowed to load arbitrary DLLs from the system. The only
DLLs they can load are those that are bundled with the app as assets.
LoadPackagedLibrary() can be used to access those assets by filename.

The function is meant to be a drop-in replacement for LoadLibrary(),
and the HANDLE returned can be treated the same as before.
This commit is contained in:
Nirbheek Chauhan 2019-05-06 19:13:35 +05:30
parent cdc2a798cf
commit be56d90fe9
1 changed files with 14 additions and 0 deletions
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14
gmodule/gmodule-win32.c
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@ -39,6 +39,12 @@
#include <sys/cygwin.h>
#endif
/* Default family is DESKTOP_APP which is DESKTOP | APP
* We want to know when we're only building for apps */
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
#define G_WINAPI_ONLY_APP
#endif
static void
set_error (const gchar *format,
...)
@ -84,7 +90,15 @@ _g_module_open (const gchar *file_name,
success = SetThreadErrorMode (SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS, &old_mode);
if (!success)
set_error ("");
/* When building for UWP, load app asset DLLs instead of filesystem DLLs.
* Needs MSVC, Windows 8 and newer, and is only usable from apps. */
#if _WIN32_WINNT >= 0x0602 && defined(G_WINAPI_ONLY_APP)
handle = LoadPackagedLibrary (wfilename, 0);
#else
handle = LoadLibraryW (wfilename);
#endif
if (success)
SetThreadErrorMode (old_mode, NULL);
g_free (wfilename);