libzmq/src/tcp_connecter.hpp

/*
    Copyright (c) 2007-2009 FastMQ Inc.

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the Lesser GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    Lesser GNU General Public License for more details.

    You should have received a copy of the Lesser GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __ZS_TCP_CONNECTER_HPP_INCLUDED__
#define __ZS_TCP_CONNECTER_HPP_INCLUDED__

#include "fd.hpp"

namespace zs
{

    //  The class encapsulating simple TCP listening socket.

    class tcp_connecter_t
    {
    public:

        tcp_connecter_t ();
        ~tcp_connecter_t ();

        //  Open TCP connecting socket. Address is in
        //  <hostname>:<port-number> format. Returns -1 in case of error,
        //  0 if connect was successfull immediately and 1 if async connect
        //  was launched.
        int open (const char *addr_);

        //  Close the connecting socket.
        int close ();

        //  Get the file descriptor to poll on to get notified about
        //  connection success.
        fd_t get_fd ();

        //  Get the file descriptor of newly created connection. Returns
        //  retired_fd if the connection was unsuccessfull.
        fd_t connect ();

    private:

        //  Underlying socket.
        fd_t s;

        tcp_connecter_t (const tcp_connecter_t&);
        void operator = (const tcp_connecter_t&);
    };

}

#endif