96 static Driver *g_driver = nullptr;  variable
112   g_driver = this;  in Driver()
117   g_driver = nullptr;  in ~Driver()
693     if ((window_size.ws_col > 0) && g_driver != nullptr) {  in sigwinch_handler()
694       g_driver->ResizeWindow(window_size.ws_col);  in sigwinch_handler()
704   if (g_driver != nullptr) {  in sigint_handler()
706       g_driver->GetDebugger().DispatchInputInterrupt();  in sigint_handler()
716   if (g_driver != nullptr)  in sigtstp_handler()
717     g_driver->GetDebugger().SaveInputTerminalState();  in sigtstp_handler()
725   if (g_driver != nullptr)  in sigcont_handler()
726     g_driver->GetDebugger().RestoreInputTerminalState();  in sigcont_handler()