Added logic and necessary functions to SDL port for new Lua emu.exit() function.

src/drivers/Qt/ConsoleWindow.cpp

@@ -80,6 +80,7 @@ consoleWin_t::consoleWin_t(QWidget *parent)
 
 	g_config->getOption( "SDL.VideoDriver", &use_SDL_video );
 
+	closeRequested = false;
 	errorMsgValid  = false;
 	viewport_GL    = NULL;
 	viewport_SDL   = NULL;
@@ -218,6 +219,11 @@ void consoleWin_t::closeEvent(QCloseEvent *event)
 	closeApp();
 }
 
+void consoleWin_t::requestClose(void)
+{
+	closeRequested = true;
+}
+
 void consoleWin_t::keyPressEvent(QKeyEvent *event)
 {
    //printf("Key Press: 0x%x \n", event->key() );
@@ -2054,6 +2060,12 @@ void consoleWin_t::updatePeriodic(void)
 		errorMsgValid = false;
 	}
 
+	if ( closeRequested )
+	{
+		closeApp();
+		closeRequested = false;
+	}
+
    return;
 }
 

src/drivers/Qt/ConsoleWindow.h

@@ -71,6 +71,8 @@ class  consoleWin_t : public QMainWindow
 
 		QMutex *mutex;
 
+		void requestClose(void);
+
 	 	void QueueErrorMsgWindow( const char *msg );
 
 		int  showListSelectDialog( const char *title, std::vector <std::string> &l );
@@ -149,6 +151,7 @@ class  consoleWin_t : public QMainWindow
 
 	 std::string errorMsg;
 	 bool        errorMsgValid;
+	 bool        closeRequested;
 
 	protected:
     void closeEvent(QCloseEvent *event);

src/drivers/Qt/fceuWrapper.cpp

@@ -383,6 +383,14 @@ bool fceuWrapperGameLoaded(void)
 	return (isloaded ? true : false);
 }
 
+void fceuWrapperRequestAppExit(void)
+{
+	if ( consoleWindow )
+	{
+		consoleWindow->requestClose();
+	}
+}
+
 static const char *DriverUsage =
 "Option         Value   Description\n"
 "--pal          {0|1}   Use PAL timing.\n"

src/drivers/Qt/fceuWrapper.h

@@ -36,4 +36,5 @@ int  fceuWrapperSoftReset(void);
 int  fceuWrapperHardReset(void);
 int  fceuWrapperTogglePause(void);
 bool fceuWrapperGameLoaded(void);
+void fceuWrapperRequestAppExit(void);
 

src/drivers/sdl/sdl.cpp

@@ -533,6 +533,10 @@ void FCEUD_TraceInstruction() {
 	return;
 }
 
+void fceuWrapperRequestAppExit(void)
+{
+	gtk_gui_run = false;
+}
 
 #ifdef _GTK
 	int noGui = 0;

src/lua-engine.cpp

@@ -57,6 +57,7 @@ extern TASEDITOR_LUA taseditor_lua;
 #else
 int LoadGame(const char *path, bool silent = false);
 int reloadLastGame(void);
+void fceuWrapperRequestAppExit(void);
 #endif
 
 #endif
@@ -6205,8 +6206,17 @@ void FCEU_LuaFrameBoundary()
 		FCEU_LuaOnStop();
 	}
 
+#if defined(__linux) || defined(__APPLE__)
+	if (exitScheduled)
+	{  // This function does not exit immediately, 
+		// it requests for the application to exit when next convenient.
+		fceuWrapperRequestAppExit();
+		exitScheduled = FALSE;
+	}
+#else
 	if (exitScheduled)
 		DoFCEUExit();
+#endif
 }
 
 /**