91 static Driver *g_driver = nullptr;  variable
107   g_driver = this;  in Driver()
112   g_driver = nullptr;  in ~Driver()
652     if ((window_size.ws_col > 0) && g_driver != nullptr) {  in sigwinch_handler()
653       g_driver->ResizeWindow(window_size.ws_col);  in sigwinch_handler()
663   if (g_driver != nullptr) {  in sigint_handler()
665       g_driver->GetDebugger().DispatchInputInterrupt();  in sigint_handler()
676   if (g_driver != nullptr)  in sigtstp_handler()
677     g_driver->GetDebugger().SaveInputTerminalState();  in sigtstp_handler()
694   if (g_driver != nullptr)  in sigtstp_handler()
695     g_driver->GetDebugger().RestoreInputTerminalState();  in sigtstp_handler()