text: /*
      Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file
  
      This file is part of 0MQ.
  
      0MQ is free software; you can redistribute it and/or modify it under
      the terms of the GNU Lesser 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
      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_TCP_HPP_INCLUDED__
  #define __ZMQ_TCP_HPP_INCLUDED__
  
  #include "fd.hpp"
  
  namespace zmq
  {
  
      //  Tunes the supplied TCP socket for the best latency.
      void tune_tcp_socket (fd_t s_);
  
      //  Sets the socket send buffer size.
      void set_tcp_send_buffer (fd_t sockfd_, int bufsize_);
  
      //  Sets the socket receive buffer size.
      void set_tcp_receive_buffer (fd_t sockfd_, int bufsize_);
  
      //  Tunes TCP keep-alives
      void tune_tcp_keepalives (fd_t s_, int keepalive_, int keepalive_cnt_, int keepalive_idle_, int keepalive_intvl_);
  
      //  Writes data to the socket. Returns the number of bytes actually
      //  written (even zero is to be considered to be a success). In case
      //  of error or orderly shutdown by the other peer -1 is returned.
      int tcp_write (fd_t s_, const void *data_, size_t size_);
  
      //  Reads data from the socket (up to 'size' bytes).
      //  Returns the number of bytes actually read or -1 on error.
      //  Zero indicates the peer has closed the connection.
      int tcp_read (fd_t s_, void *data_, size_t size_);
  
  }
  
  #endif 
  