Function DoExecuteEvent

library/cpp/coroutine/engine/cont_poller.cpp:7–22

    namespace {
        template <class T>
        int DoExecuteEvent(T* event) noexcept {
            auto* cont = event->Cont();

            if (cont->Cancelled()) {
                return ECANCELED;
            }

            cont->Executor()->ScheduleIoWait(event);
            cont->Switch();

            if (cont->Cancelled()) {
                return ECANCELED;
            }

            return event->Status();
        }
    }

    void TContPollEvent::Wake() noexcept {