text: /*
      Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
  
      This file is part of libzmq, the ZeroMQ core engine in C++.
  
      libzmq is free software; you can redistribute it and/or modify it under
      the terms of the GNU Lesser General Public License (LGPL) as published
      by the Free Software Foundation; either version 3 of the License, or
      (at your option) any later version.
  
      As a special exception, the Contributors give you permission to link
      this library with independent modules to produce an executable,
      regardless of the license terms of these independent modules, and to
      copy and distribute the resulting executable under terms of your choice,
      provided that you also meet, for each linked independent module, the
      terms and conditions of the license of that module. An independent
      module is a module which is not derived from or based on this library.
      If you modify this library, you must extend this exception to your
      version of the library.
  
      libzmq 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 GNU Lesser General Public
      License for more details.
  
      You should have received a copy of the GNU Lesser General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  #ifndef __ZMQ_PAIR_HPP_INCLUDED__
  #define __ZMQ_PAIR_HPP_INCLUDED__
  
  #include "blob.hpp"
  #include "socket_base.hpp"
  #include "session_base.hpp"
  
  namespace zmq
  {
  class ctx_t;
  class msg_t;
  class pipe_t;
  class io_thread_t;
  
  class pair_t : public socket_base_t
  {
    public:
      pair_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
      ~pair_t ();
  
      //  Overrides of functions from socket_base_t.
      void xattach_pipe (zmq::pipe_t *pipe_,
                         bool subscribe_to_all_,
                         bool locally_initiated_);
      int xsend (zmq::msg_t *msg_);
      int xrecv (zmq::msg_t *msg_);
      bool xhas_in ();
      bool xhas_out ();
      void xread_activated (zmq::pipe_t *pipe_);
      void xwrite_activated (zmq::pipe_t *pipe_);
      void xpipe_terminated (zmq::pipe_t *pipe_);
  
    private:
      zmq::pipe_t *_pipe;
  
      zmq::pipe_t *_last_in;
  
      pair_t (const pair_t &);
      const pair_t &operator= (const pair_t &);
  };
  }
  
  #endif
  