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

   1 //
   2 // local/connect_pair.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 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, typename Executor1, typename Executor2>
  37 void connect_pair(basic_socket<Protocol, Executor1>& socket1,
  38     basic_socket<Protocol, Executor2>& socket2);
  39
  40 /// Create a pair of connected sockets.
  41 template <typename Protocol, typename Executor1, typename Executor2>
  42 BOOST_ASIO_SYNC_OP_VOID connect_pair(basic_socket<Protocol, Executor1>& socket1,
  43     basic_socket<Protocol, Executor2>& socket2, boost::system::error_code& ec);
  44
  45 template <typename Protocol, typename Executor1, typename Executor2>
  46 inline void connect_pair(basic_socket<Protocol, Executor1>& socket1,
  47     basic_socket<Protocol, Executor2>& socket2)
  48 {
  49   boost::system::error_code ec;
  50   connect_pair(socket1, socket2, ec);
  51   boost::asio::detail::throw_error(ec, "connect_pair");
  52 }
  53
  54 template <typename Protocol, typename Executor1, typename Executor2>
  55 inline BOOST_ASIO_SYNC_OP_VOID connect_pair(
  56     basic_socket<Protocol, Executor1>& socket1,
  57     basic_socket<Protocol, Executor2>& socket2, boost::system::error_code& ec)
  58 {
  59   // Check that this function is only being used with a UNIX domain socket.
  60   boost::asio::local::basic_endpoint<Protocol>* tmp
  61     = static_cast<typename Protocol::endpoint*>(0);
  62   (void)tmp;
  63
  64   Protocol protocol;
  65   boost::asio::detail::socket_type sv[2];
  66   if (boost::asio::detail::socket_ops::socketpair(protocol.family(),
  67         protocol.type(), protocol.protocol(), sv, ec)
  68       == boost::asio::detail::socket_error_retval)
  69     BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  70
  71   socket1.assign(protocol, sv[0], ec);
  72   if (ec)
  73   {
  74     boost::system::error_code temp_ec;
  75     boost::asio::detail::socket_ops::state_type state[2] = { 0, 0 };
  76     boost::asio::detail::socket_ops::close(sv[0], state[0], true, temp_ec);
  77     boost::asio::detail::socket_ops::close(sv[1], state[1], true, temp_ec);
  78     BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  79   }
  80
  81   socket2.assign(protocol, sv[1], ec);
  82   if (ec)
  83   {
  84     boost::system::error_code temp_ec;
  85     socket1.close(temp_ec);
  86     boost::asio::detail::socket_ops::state_type state = 0;
  87     boost::asio::detail::socket_ops::close(sv[1], state, true, temp_ec);
  88     BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  89   }
  90
  91   BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
  92 }
  93
  94 } // namespace local
  95 } // namespace asio
  96 } // namespace boost
  97
  98 #include <boost/asio/detail/pop_options.hpp>
  99
 100 #endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
 101        //   || defined(GENERATING_DOCUMENTATION)
 102
 103 #endif // BOOST_ASIO_LOCAL_CONNECT_PAIR_HPP