void PollingThread::WorkThread(void *) {
    while (!shutdown_) {
        DWORD NumberOfBytesTransferred = 0;
        void *CompletionKey            = NULL;
        LPOVERLAPPED lpOverlapped      = NULL;

        bool ret = iocp_.polling(&NumberOfBytesTransferred, (PULONG_PTR)&CompletionKey,
                                 &lpOverlapped, 1000);

        OverLappedEx *olex = (OverLappedEx *)lpOverlapped;

        EventDetail detail;
        detail.error_code        = 0;
        detail.event_type        = olex->event_type;
        detail.ptr               = CompletionKey;
        detail.overlaped         = olex;
        detail.transferred_bytes = NumberOfBytesTransferred;

        olex->service->OnEventProcess(&detail);
    }
}