ceph/src/boost/boost/asio/detail/win_iocp_socket_connect_op.hpp

   1 //
   2 // detail/win_iocp_socket_connect_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2022 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_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP
  12 #define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_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_IOCP)
  21
  22 #include <boost/asio/detail/bind_handler.hpp>
  23 #include <boost/asio/detail/fenced_block.hpp>
  24 #include <boost/asio/detail/handler_alloc_helpers.hpp>
  25 #include <boost/asio/detail/handler_invoke_helpers.hpp>
  26 #include <boost/asio/detail/handler_work.hpp>
  27 #include <boost/asio/detail/memory.hpp>
  28 #include <boost/asio/detail/reactor_op.hpp>
  29 #include <boost/asio/detail/socket_ops.hpp>
  30 #include <boost/asio/error.hpp>
  31
  32 #include <boost/asio/detail/push_options.hpp>
  33
  34 namespace boost {
  35 namespace asio {
  36 namespace detail {
  37
  38 class win_iocp_socket_connect_op_base : public reactor_op
  39 {
  40 public:
  41   win_iocp_socket_connect_op_base(socket_type socket, func_type complete_func)
  42     : reactor_op(boost::system::error_code(),
  43         &win_iocp_socket_connect_op_base::do_perform, complete_func),
  44       socket_(socket),
  45       connect_ex_(false)
  46   {
  47   }
  48
  49   static status do_perform(reactor_op* base)
  50   {
  51     win_iocp_socket_connect_op_base* o(
  52         static_cast<win_iocp_socket_connect_op_base*>(base));
  53
  54     return socket_ops::non_blocking_connect(
  55         o->socket_, o->ec_) ? done : not_done;
  56   }
  57
  58   socket_type socket_;
  59   bool connect_ex_;
  60 };
  61
  62 template <typename Handler, typename IoExecutor>
  63 class win_iocp_socket_connect_op : public win_iocp_socket_connect_op_base
  64 {
  65 public:
  66   BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_connect_op);
  67
  68   win_iocp_socket_connect_op(socket_type socket,
  69       Handler& handler, const IoExecutor& io_ex)
  70     : win_iocp_socket_connect_op_base(socket,
  71         &win_iocp_socket_connect_op::do_complete),
  72       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
  73       work_(handler_, io_ex)
  74   {
  75   }
  76
  77   static void do_complete(void* owner, operation* base,
  78       const boost::system::error_code& result_ec,
  79       std::size_t /*bytes_transferred*/)
  80   {
  81     boost::system::error_code ec(result_ec);
  82
  83     // Take ownership of the operation object.
  84     win_iocp_socket_connect_op* o(
  85         static_cast<win_iocp_socket_connect_op*>(base));
  86     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  87
  88     if (owner)
  89     {
  90       if (o->connect_ex_)
  91         socket_ops::complete_iocp_connect(o->socket_, ec);
  92       else
  93         ec = o->ec_;
  94     }
  95
  96     BOOST_ASIO_HANDLER_COMPLETION((*o));
  97
  98     // Take ownership of the operation's outstanding work.
  99     handler_work<Handler, IoExecutor> w(
 100         BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)(
 101           o->work_));
 102
 103     // Make a copy of the handler so that the memory can be deallocated before
 104     // the upcall is made. Even if we're not about to make an upcall, a
 105     // sub-object of the handler may be the true owner of the memory associated
 106     // with the handler. Consequently, a local copy of the handler is required
 107     // to ensure that any owning sub-object remains valid until after we have
 108     // deallocated the memory here.
 109     detail::binder1<Handler, boost::system::error_code>
 110       handler(o->handler_, ec);
 111     p.h = boost::asio::detail::addressof(handler.handler_);
 112     p.reset();
 113
 114     // Make the upcall if required.
 115     if (owner)
 116     {
 117       fenced_block b(fenced_block::half);
 118       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
 119       w.complete(handler, handler.handler_);
 120       BOOST_ASIO_HANDLER_INVOCATION_END;
 121     }
 122   }
 123
 124 private:
 125   Handler handler_;
 126   handler_work<Handler, IoExecutor> work_;
 127 };
 128
 129 } // namespace detail
 130 } // namespace asio
 131 } // namespace boost
 132
 133 #include <boost/asio/detail/pop_options.hpp>
 134
 135 #endif // defined(BOOST_ASIO_HAS_IOCP)
 136
 137 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP