191         let mut update = false;  in read()  localVariable
193             DR => self.read_data_register(&mut update),  in read()
212         (update, result)  in read()
247                 let update = (self.line_control.send_break() != new_val.send_break()) && {  in write()  localVariable
254                 return update;  in write()
286     fn read_data_register(&mut self, update: &mut bool) -> u32 {  in read_data_register()
301         *update = true;  in read_data_register()
547                     self.update();  in read()
576             self.update();  in write()
601         // Release the BqlRefCell before calling self.update()  in receive()
604             self.update();  in receive()
614         // Release the BqlRefCell before calling self.update()  in event()
618             self.update()  in event()
632     fn update(&self) {  in update()  method