tdf#146554: use GetModuleHandleExW instead of GetModuleHandleW

This allows to avoid use of module name when obtaining current module
handle, which needs to be synchronized and thus is error-prone.

Change-Id: I2f0e0af7f616c3582b0a3271cf9e06420a9dfc8e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127993
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

shell/inc/config.hxx

@@ -20,12 +20,6 @@
 #ifndef INCLUDED_SHELL_INC_INTERNAL_CONFIG_HXX
 #define INCLUDED_SHELL_INC_INTERNAL_CONFIG_HXX
 
-#ifdef _AMD64_
-#define MODULE_NAME L"shlxthdl_x64.dll"
-#else
-#define MODULE_NAME L"shlxthdl.dll"
-#endif
-
 #define COLUMN_HANDLER_DESCRIPTIVE_NAME    L"LibreOffice Column Handler"
 #define INFOTIP_HANDLER_DESCRIPTIVE_NAME   L"LibreOffice Infotip Handler"
 #define PROPSHEET_HANDLER_DESCRIPTIVE_NAME L"LibreOffice Property Sheet Handler"

shell/inc/global.hxx

@@ -25,6 +25,8 @@
 #endif
 #include <windows.h>
 
+HMODULE GetCurrentModuleHandle();
+
 extern LONG g_DllRefCnt;
 
 #endif

shell/source/win32/shlxthandler/propsheets/listviewbuilder.cxx

@@ -22,6 +22,7 @@
 #include "document_statistic.hxx"
 #include <utilities.hxx>
 #include <config.hxx>
+#include <global.hxx>
 
 #include <commctrl.h>
 #include <resource.h>
@@ -87,7 +88,7 @@ void list_view_builder::build(statistic_group_list_t& gl)
 void list_view_builder::setup_list_view()
 {
     HIMAGELIST h_ils = ImageList_Create(16,15,ILC_MASK, 7, 0);
-    HBITMAP    h_bmp = LoadBitmapW(GetModuleHandleW(MODULE_NAME), MAKEINTRESOURCEW(IDB_PROPERTY_IMAGES));
+    HBITMAP    h_bmp = LoadBitmapW(GetCurrentModuleHandle(), MAKEINTRESOURCEW(IDB_PROPERTY_IMAGES));
     ImageList_AddMasked(h_ils, h_bmp, RGB(255, 0, 255));
 
     (void) ListView_SetImageList(hwnd_list_view_, h_ils, LVSIL_SMALL);

shell/source/win32/shlxthandler/propsheets/propsheets.cxx

@@ -171,7 +171,7 @@ HRESULT STDMETHODCALLTYPE CPropertySheet::AddPages(LPFNSVADDPROPSHEETPAGE lpfnAd
     // add the summary property page
     psp.dwSize      = sizeof(psp);
     psp.dwFlags     = PSP_DEFAULT | PSP_USETITLE | PSP_USECALLBACK;
-    psp.hInstance   = GetModuleHandleW(MODULE_NAME);
+    psp.hInstance   = GetCurrentModuleHandle();
     psp.lParam      = reinterpret_cast<LPARAM>(this);
     psp.pfnCallback = reinterpret_cast<LPFNPSPCALLBACKW>(CPropertySheet::PropPageSummaryCallback);
 

shell/source/win32/shlxthandler/shlxthdl.cxx

@@ -303,7 +303,7 @@ STDAPI DllRegisterServer()
     WCHAR ModuleFileName[MAX_PATH];
 
     GetModuleFileNameW(
-        GetModuleHandleW(MODULE_NAME),
+        GetCurrentModuleHandle(),
         ModuleFileName,
         sizeof(ModuleFileName)/sizeof(ModuleFileName[0]));
 

shell/source/win32/shlxthandler/util/utilities.cxx

@@ -22,6 +22,7 @@
 #include <memory>
 
 #include <config.hxx>
+#include <global.hxx>
 #include <utilities.hxx>
 
 // constants
@@ -81,7 +82,7 @@ std::wstring GetResString(int ResId)
 {
     wchar_t szResStr[MAX_RES_STRING];
 
-    int rc = LoadStringW( GetModuleHandleW(MODULE_NAME), ResId, szResStr, sizeof(szResStr) );
+    int rc = LoadStringW( GetCurrentModuleHandle(), ResId, szResStr, sizeof(szResStr) );
 
     OutputDebugStringFormatW( L"GetResString: read %d chars\n", rc );
     // OSL_ENSURE(rc, "String resource not found");
@@ -544,4 +545,21 @@ LCID LocaleSetToLCID( const LocaleSet_t & Locale )
     return MAKELCID( MAKELANGID( usPrimaryLang, usSubLang ), SORT_DEFAULT );
 }
 
+// The function is defined in the static library, and thus its address is local to current module
+HMODULE GetCurrentModuleHandle()
+{
+    HMODULE h{};
+
+    if (GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
+                               | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+                           reinterpret_cast<LPCWSTR>(&GetCurrentModuleHandle), &h)
+        == 0)
+    {
+        const DWORD dwError = GetLastError();
+        OutputDebugStringFormatW(
+            L"GetCurrentModuleHandle: GetModuleHandleExW failed, error is 0x%X", dwError);
+    }
+    return h;
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */