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1 | // |
2 | // detail/reactive_socket_accept_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 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_REACTIVE_SOCKET_ACCEPT_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_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 | #include <boost/asio/detail/addressof.hpp> | |
20 | #include <boost/asio/detail/bind_handler.hpp> | |
21 | #include <boost/asio/detail/buffer_sequence_adapter.hpp> | |
22 | #include <boost/asio/detail/fenced_block.hpp> | |
23 | #include <boost/asio/detail/reactor_op.hpp> | |
24 | #include <boost/asio/detail/socket_holder.hpp> | |
25 | #include <boost/asio/detail/socket_ops.hpp> | |
26 | ||
27 | #include <boost/asio/detail/push_options.hpp> | |
28 | ||
29 | namespace boost { | |
30 | namespace asio { | |
31 | namespace detail { | |
32 | ||
33 | template <typename Socket, typename Protocol> | |
34 | class reactive_socket_accept_op_base : public reactor_op | |
35 | { | |
36 | public: | |
37 | reactive_socket_accept_op_base(socket_type socket, | |
38 | socket_ops::state_type state, Socket& peer, const Protocol& protocol, | |
39 | typename Protocol::endpoint* peer_endpoint, func_type complete_func) | |
40 | : reactor_op(&reactive_socket_accept_op_base::do_perform, complete_func), | |
41 | socket_(socket), | |
42 | state_(state), | |
43 | peer_(peer), | |
44 | protocol_(protocol), | |
45 | peer_endpoint_(peer_endpoint) | |
46 | { | |
47 | } | |
48 | ||
49 | static bool do_perform(reactor_op* base) | |
50 | { | |
51 | reactive_socket_accept_op_base* o( | |
52 | static_cast<reactive_socket_accept_op_base*>(base)); | |
53 | ||
54 | std::size_t addrlen = o->peer_endpoint_ ? o->peer_endpoint_->capacity() : 0; | |
55 | socket_type new_socket = invalid_socket; | |
56 | bool result = socket_ops::non_blocking_accept(o->socket_, | |
57 | o->state_, o->peer_endpoint_ ? o->peer_endpoint_->data() : 0, | |
58 | o->peer_endpoint_ ? &addrlen : 0, o->ec_, new_socket); | |
59 | ||
60 | // On success, assign new connection to peer socket object. | |
61 | if (new_socket != invalid_socket) | |
62 | { | |
63 | socket_holder new_socket_holder(new_socket); | |
64 | if (o->peer_endpoint_) | |
65 | o->peer_endpoint_->resize(addrlen); | |
66 | if (!o->peer_.assign(o->protocol_, new_socket, o->ec_)) | |
67 | new_socket_holder.release(); | |
68 | } | |
69 | ||
70 | return result; | |
71 | } | |
72 | ||
73 | private: | |
74 | socket_type socket_; | |
75 | socket_ops::state_type state_; | |
76 | Socket& peer_; | |
77 | Protocol protocol_; | |
78 | typename Protocol::endpoint* peer_endpoint_; | |
79 | }; | |
80 | ||
81 | template <typename Socket, typename Protocol, typename Handler> | |
82 | class reactive_socket_accept_op : | |
83 | public reactive_socket_accept_op_base<Socket, Protocol> | |
84 | { | |
85 | public: | |
86 | BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_accept_op); | |
87 | ||
88 | reactive_socket_accept_op(socket_type socket, | |
89 | socket_ops::state_type state, Socket& peer, const Protocol& protocol, | |
90 | typename Protocol::endpoint* peer_endpoint, Handler& handler) | |
91 | : reactive_socket_accept_op_base<Socket, Protocol>(socket, state, peer, | |
92 | protocol, peer_endpoint, &reactive_socket_accept_op::do_complete), | |
93 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) | |
94 | { | |
95 | } | |
96 | ||
97 | static void do_complete(io_service_impl* owner, operation* base, | |
98 | const boost::system::error_code& /*ec*/, | |
99 | std::size_t /*bytes_transferred*/) | |
100 | { | |
101 | // Take ownership of the handler object. | |
102 | reactive_socket_accept_op* o(static_cast<reactive_socket_accept_op*>(base)); | |
103 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
104 | ||
105 | BOOST_ASIO_HANDLER_COMPLETION((o)); | |
106 | ||
107 | // Make a copy of the handler so that the memory can be deallocated before | |
108 | // the upcall is made. Even if we're not about to make an upcall, a | |
109 | // sub-object of the handler may be the true owner of the memory associated | |
110 | // with the handler. Consequently, a local copy of the handler is required | |
111 | // to ensure that any owning sub-object remains valid until after we have | |
112 | // deallocated the memory here. | |
113 | detail::binder1<Handler, boost::system::error_code> | |
114 | handler(o->handler_, o->ec_); | |
115 | p.h = boost::asio::detail::addressof(handler.handler_); | |
116 | p.reset(); | |
117 | ||
118 | // Make the upcall if required. | |
119 | if (owner) | |
120 | { | |
121 | fenced_block b(fenced_block::half); | |
122 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_)); | |
123 | boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); | |
124 | BOOST_ASIO_HANDLER_INVOCATION_END; | |
125 | } | |
126 | } | |
127 | ||
128 | private: | |
129 | Handler handler_; | |
130 | }; | |
131 | ||
132 | } // namespace detail | |
133 | } // namespace asio | |
134 | } // namespace boost | |
135 | ||
136 | #include <boost/asio/detail/pop_options.hpp> | |
137 | ||
138 | #endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_OP_HPP |