30   std::function<bool()> callback;  member
33   IOEvent(IOEventLoop* loop, const std::function<bool()>& callback)  in IOEvent()
34       : loop(loop), e(nullptr), timeout({}), callback(callback), enabled(false) {}  in IOEvent()
102   if (!e->callback()) {  in EventCallbackFn()
117 IOEventRef IOEventLoop::AddReadEvent(int fd, const std::function<bool()>& callback,  in AddReadEvent()  argument
122   return AddEvent(fd, EV_READ | EV_PERSIST, nullptr, callback, priority);  in AddReadEvent()
125 IOEventRef IOEventLoop::AddWriteEvent(int fd, const std::function<bool()>& callback,  in AddWriteEvent()  argument
130   return AddEvent(fd, EV_WRITE | EV_PERSIST, nullptr, callback, priority);  in AddWriteEvent()
133 bool IOEventLoop::AddSignalEvent(int sig, const std::function<bool()>& callback,  in AddSignalEvent()  argument
135   return AddEvent(sig, EV_SIGNAL | EV_PERSIST, nullptr, callback, priority) != nullptr;  in AddSignalEvent()
138 bool IOEventLoop::AddSignalEvents(std::vector<int> sigs, const std::function<bool()>& callback,  in AddSignalEvents()  argument
141     if (!AddSignalEvent(sig, callback, priority)) {  in AddSignalEvents()
148 IOEventRef IOEventLoop::AddPeriodicEvent(timeval duration, const std::function<bool()>& callback,  in AddPeriodicEvent()  argument
150   return AddEvent(-1, EV_PERSIST, &duration, callback, priority);  in AddPeriodicEvent()
154                                  const std::function<bool()>& callback, IOEventPriority priority) {  in AddEvent()  argument
158   std::unique_ptr<IOEvent> e(new IOEvent(this, callback));  in AddEvent()