601 struct device_tracker {  struct
605     device_tracker* next = nullptr;  argument
609 static device_tracker* device_tracker_list;
611 static void device_tracker_remove(device_tracker* tracker) {  in device_tracker_remove()
612     device_tracker** pnode = &device_tracker_list;  in device_tracker_remove()
613     device_tracker* node = *pnode;  in device_tracker_remove()
627     device_tracker* tracker = (device_tracker*)socket;  in device_tracker_close()
645 static int device_tracker_send(device_tracker* tracker, const std::string& string) {  in device_tracker_send()
658     device_tracker* tracker = reinterpret_cast<device_tracker*>(socket);  in device_tracker_ready()
669     device_tracker* tracker = new device_tracker();  in create_device_tracker()
707     device_tracker* tracker = device_tracker_list;  in update_transports()
709         device_tracker* next = tracker->next;  in update_transports()