Add the GuiGetMainThreadId function

src/bridge/bridgemain.cpp

@@ -1783,6 +1783,11 @@ BRIDGE_IMPEXP void GuiShowTrace()
     _gui_sendmessage(GUI_SHOW_TRACE, nullptr, nullptr);
 }
 
+BRIDGE_IMPEXP DWORD GuiGetMainThreadId()
+{
+    return (DWORD)(duint)_gui_sendmessage(GUI_GET_MAIN_THREAD_ID, nullptr, nullptr);
+}
+
 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 {
     hInst = hinstDLL;

src/bridge/bridgemain.h

@@ -1207,6 +1207,7 @@ typedef enum
     GUI_SELECT_IN_SYMBOLS_TAB,      // param1=duint addr,           param2=unused
     GUI_GOTO_TRACE,                 // param1=duint index,          param2=unused
     GUI_SHOW_TRACE,                 // param1=unused,               param2=unused
+    GUI_GET_MAIN_THREAD_ID,         // param1=unused,               param2=unused
 } GUIMSG;
 
 //GUI Typedefs
@@ -1392,6 +1393,7 @@ BRIDGE_IMPEXP void GuiShowReferences();
 BRIDGE_IMPEXP void GuiSelectInSymbolsTab(duint addr);
 BRIDGE_IMPEXP void GuiGotoTrace(duint index);
 BRIDGE_IMPEXP void GuiShowTrace();
+BRIDGE_IMPEXP DWORD GuiGetMainThreadId();
 
 #ifdef __cplusplus
 }

src/gui/Src/Bridge/Bridge.cpp

@@ -898,6 +898,9 @@ void* Bridge::processMessage(GUIMSG type, void* param1, void* param2)
     case GUI_SHOW_TRACE:
         emit showTraceBrowser();
         break;
+
+    case GUI_GET_MAIN_THREAD_ID:
+        return (void*)dwMainThreadId;
     }
 
     return nullptr;