ceph/src/boost/boost/asio/local/connect_pair.hpp

   1 //
   2 // local/connect_pair.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP
  12 #define BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS) \
  21   || defined(GENERATING_DOCUMENTATION)
  22
  23 #include <boost/asio/basic_socket.hpp>
  24 #include <boost/asio/detail/socket_ops.hpp>
  25 #include <boost/asio/detail/throw_error.hpp>
  26 #include <boost/asio/error.hpp>
  27 #include <boost/asio/local/basic_endpoint.hpp>
  28
  29 #include <boost/asio/detail/push_options.hpp>
  30
  31 namespace boost {
  32 namespace asio {
  33 namespace local {
  34
  35 /// Create a pair of connected sockets.
  36 template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  37 void connect_pair(
  38     basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
  39     basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2);
  40
  41 /// Create a pair of connected sockets.
  42 template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  43 BOOST_ASIO_SYNC_OP_VOID connect_pair(
  44     basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
  45     basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2,
  46     boost::system::error_code& ec);
  47
  48 template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  49 inline void connect_pair(
  50     basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
  51     basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2)
  52 {
  53   boost::system::error_code ec;
  54   connect_pair(socket1, socket2, ec);
  55   boost::asio::detail::throw_error(ec, "connect_pair");
  56 }
  57
  58 template <typename Protocol BOOST_ASIO_SVC_TPARAM BOOST_ASIO_SVC_TPARAM1>
  59 inline BOOST_ASIO_SYNC_OP_VOID connect_pair(
  60     basic_socket<Protocol BOOST_ASIO_SVC_TARG>& socket1,
  61     basic_socket<Protocol BOOST_ASIO_SVC_TARG1>& socket2,
  62     boost::system::error_code& ec)
  63 {
  64   // Check that this function is only being used with a UNIX domain socket.
  65   boost::asio::local::basic_endpoint<Protocol>* tmp
  66     = static_cast<typename Protocol::endpoint*>(0);
  67   (void)tmp;
  68
  69   Protocol protocol;
  70   boost::asio::detail::socket_type sv[2];
  71   if (boost::asio::detail::socket_ops::socketpair(protocol.family(),
  72         protocol.type(), protocol.protocol(), sv, ec)
  73       == boost::asio::detail::socket_error_retval)
  74     BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  75
  76   socket1.assign(protocol, sv[0], ec);
  77   if (ec)
  78   {
  79     boost::system::error_code temp_ec;
  80     boost::asio::detail::socket_ops::state_type state[2] = { 0, 0 };
  81     boost::asio::detail::socket_ops::close(sv[0], state[0], true, temp_ec);
  82     boost::asio::detail::socket_ops::close(sv[1], state[1], true, temp_ec);
  83     BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  84   }
  85
  86   socket2.assign(protocol, sv[1], ec);
  87   if (ec)
  88   {
  89     boost::system::error_code temp_ec;
  90     socket1.close(temp_ec);
  91     boost::asio::detail::socket_ops::state_type state = 0;
  92     boost::asio::detail::socket_ops::close(sv[1], state, true, temp_ec);
  93     BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  94   }
  95
  96   BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  97 }
  98
  99 } // namespace local
 100 } // namespace asio
 101 } // namespace boost
 102
 103 #include <boost/asio/detail/pop_options.hpp>
 104
 105 #endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
 106        //   || defined(GENERATING_DOCUMENTATION)
 107
 108 #endif // BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP