text: //
  // local/connect_pair.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  //
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  //
  
  #ifndef BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP
  #define BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include <boost/asio/detail/config.hpp>
  
  #if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS) \
    || defined(GENERATING_DOCUMENTATION)
  
  #include <boost/asio/basic_socket.hpp>
  #include <boost/asio/detail/socket_ops.hpp>
  #include <boost/asio/detail/throw_error.hpp>
  #include <boost/asio/error.hpp>
  #include <boost/asio/local/basic_endpoint.hpp>
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace lslboost {
  namespace asio {
  namespace local {
  
  /// Create a pair of connected sockets.
  template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  void connect_pair(
      basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
      basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2);
  
  /// Create a pair of connected sockets.
  template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  BOOST_ASIO_SYNC_OP_VOID connect_pair(
      basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
      basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2,
      lslboost::system::error_code& ec);
  
  template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  inline void connect_pair(
      basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
      basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2)
  {
    lslboost::system::error_code ec;
    connect_pair(socket1, socket2, ec);
    lslboost::asio::detail::throw_error(ec, "connect_pair");
  }
  
  template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  inline BOOST_ASIO_SYNC_OP_VOID connect_pair(
      basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
      basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2,
      lslboost::system::error_code& ec)
  {
    // Check that this function is only being used with a UNIX domain socket.
    lslboost::asio::local::basic_endpoint<Protocol>* tmp
      = static_cast<typename Protocol::endpoint*>(0);
    (void)tmp;
  
    Protocol protocol;
    lslboost::asio::detail::socket_type sv[2];
    if (lslboost::asio::detail::socket_ops::socketpair(protocol.family(),
          protocol.type(), protocol.protocol(), sv, ec)
        == lslboost::asio::detail::socket_error_retval)
      BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  
    socket1.assign(protocol, sv[0], ec);
    if (ec)
    {
      lslboost::system::error_code temp_ec;
      lslboost::asio::detail::socket_ops::state_type state[2] = { 0, 0 };
      lslboost::asio::detail::socket_ops::close(sv[0], state[0], true, temp_ec);
      lslboost::asio::detail::socket_ops::close(sv[1], state[1], true, temp_ec);
      BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
    }
  
    socket2.assign(protocol, sv[1], ec);
    if (ec)
    {
      lslboost::system::error_code temp_ec;
      socket1.close(temp_ec);
      lslboost::asio::detail::socket_ops::state_type state = 0;
      lslboost::asio::detail::socket_ops::close(sv[1], state, true, temp_ec);
      BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
    }
  
    BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  }
  
  } // namespace local
  } // namespace asio
  } // namespace lslboost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  #endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
         //   || defined(GENERATING_DOCUMENTATION)
  
  #endif // BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP
  