test

    bool socketwait::isDisconnected(socket &sock) {

        SOCKET fd = sock.fd();

        if (fd < 0) return true;

        struct epoll_event ev{};

        ev.events  = EPOLLIN;

        // A peer FIN normally reports EPOLLIN (readable EOF), not EPOLLHUP.

        // Ask for RDHUP explicitly so a pooled client reconnects before reuse.

        ev.events  = EPOLLIN | EPOLLRDHUP;

        ev.data.fd = fd;

        epoll_ctl(_handle, EPOLL_CTL_ADD, fd, &ev);

        struct epoll_event out;

        if (epoll_ctl(_handle, EPOLL_CTL_ADD, fd, &ev) < 0) return true;

        struct epoll_event out{};

        int r = ::epoll_wait(_handle, &out, 1, 0);

        epoll_ctl(_handle, EPOLL_CTL_DEL, fd, nullptr);

        return r > 0 && (out.events & (EPOLLHUP | EPOLLERR));

        return r < 0 || (r > 0 && (out.events & (EPOLLRDHUP | EPOLLHUP | EPOLLERR)));

    }

    std::shared_ptr<con> lookupConnection(int fd) {