-inline event::event(afb_event_t e) : event_(e) { }
-inline event::event(const event &other) : event_(other.event_) { }
+inline event::event() : event_{nullptr} { }
+inline event::event(afb_event_t e) : event_{e} { }
+inline event::event(event &&other) : event_{other.event_} { other.event_ = nullptr; }
+inline event::event(const event &other) : event_{other.event_} { addref(); }
+inline event::~event() { unref(); }