Method fini

net/kernel_socket.cpp:834–843

    }

    int fini() {
        loop->stop();
        if (epfd > 0) {
            close(epfd);
            epfd = 0;
        }
        delete loop;
        loop = nullptr;
        return 0;
    }

    int waiter(EventLoop*) {
        auto ret = photon::wait_for_fd_readable(epfd, 1 * 1000UL);