89 static Driver *g_driver = nullptr;  variable
105   g_driver = this;  in Driver()
110   g_driver = nullptr;  in ~Driver()
635     if ((window_size.ws_col > 0) && g_driver != nullptr) {  in sigwinch_handler()
636       g_driver->ResizeWindow(window_size.ws_col);  in sigwinch_handler()
646   if (g_driver != nullptr) {  in sigint_handler()
648       g_driver->GetDebugger().DispatchInputInterrupt();  in sigint_handler()
659   if (g_driver != nullptr)  in sigtstp_handler()
660     g_driver->GetDebugger().SaveInputTerminalState();  in sigtstp_handler()
677   if (g_driver != nullptr)  in sigtstp_handler()
678     g_driver->GetDebugger().RestoreInputTerminalState();  in sigtstp_handler()