1 //
2 // detail/win_iocp_socket_connect_op.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2015 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/addressof.hpp>
23 #include <boost/asio/detail/bind_handler.hpp>
24 #include <boost/asio/detail/fenced_block.hpp>
25 #include <boost/asio/detail/handler_alloc_helpers.hpp>
26 #include <boost/asio/detail/handler_invoke_helpers.hpp>
27 #include <boost/asio/detail/reactor_op.hpp>
28 #include <boost/asio/detail/socket_ops.hpp>
29 #include <boost/asio/error.hpp>
30 
31 #include <boost/asio/detail/push_options.hpp>
32 
33 namespace boost {
34 namespace asio {
35 namespace detail {
36 
37 class win_iocp_socket_connect_op_base : public reactor_op
38 {
39 public:
win_iocp_socket_connect_op_base(socket_type socket,func_type complete_func)40   win_iocp_socket_connect_op_base(socket_type socket, func_type complete_func)
41     : reactor_op(&win_iocp_socket_connect_op_base::do_perform, complete_func),
42       socket_(socket),
43       connect_ex_(false)
44   {
45   }
46 
do_perform(reactor_op * base)47   static bool do_perform(reactor_op* base)
48   {
49     win_iocp_socket_connect_op_base* o(
50         static_cast<win_iocp_socket_connect_op_base*>(base));
51 
52     return socket_ops::non_blocking_connect(o->socket_, o->ec_);
53   }
54 
55   socket_type socket_;
56   bool connect_ex_;
57 };
58 
59 template <typename Handler>
60 class win_iocp_socket_connect_op : public win_iocp_socket_connect_op_base
61 {
62 public:
63   BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_connect_op);
64 
win_iocp_socket_connect_op(socket_type socket,Handler & handler)65   win_iocp_socket_connect_op(socket_type socket, Handler& handler)
66     : win_iocp_socket_connect_op_base(socket,
67         &win_iocp_socket_connect_op::do_complete),
68       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
69   {
70   }
71 
do_complete(io_service_impl * owner,operation * base,const boost::system::error_code & result_ec,std::size_t)72   static void do_complete(io_service_impl* owner, operation* base,
73       const boost::system::error_code& result_ec,
74       std::size_t /*bytes_transferred*/)
75   {
76     boost::system::error_code ec(result_ec);
77 
78     // Take ownership of the operation object.
79     win_iocp_socket_connect_op* o(
80         static_cast<win_iocp_socket_connect_op*>(base));
81     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
82 
83     if (owner)
84     {
85       if (o->connect_ex_)
86         socket_ops::complete_iocp_connect(o->socket_, ec);
87       else
88         ec = o->ec_;
89     }
90 
91     BOOST_ASIO_HANDLER_COMPLETION((o));
92 
93     // Make a copy of the handler so that the memory can be deallocated before
94     // the upcall is made. Even if we're not about to make an upcall, a
95     // sub-object of the handler may be the true owner of the memory associated
96     // with the handler. Consequently, a local copy of the handler is required
97     // to ensure that any owning sub-object remains valid until after we have
98     // deallocated the memory here.
99     detail::binder1<Handler, boost::system::error_code>
100       handler(o->handler_, ec);
101     p.h = boost::asio::detail::addressof(handler.handler_);
102     p.reset();
103 
104     // Make the upcall if required.
105     if (owner)
106     {
107       fenced_block b(fenced_block::half);
108       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
109       boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
110       BOOST_ASIO_HANDLER_INVOCATION_END;
111     }
112   }
113 
114 private:
115   Handler handler_;
116 };
117 
118 } // namespace detail
119 } // namespace asio
120 } // namespace boost
121 
122 #include <boost/asio/detail/pop_options.hpp>
123 
124 #endif // defined(BOOST_ASIO_HAS_IOCP)
125 
126 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP
127