1 | // |
2 | // detail/reactive_socket_accept_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_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(s: o->socket_, |
57 | state: o->state_, addr: o->peer_endpoint_ ? o->peer_endpoint_->data() : 0, |
58 | addrlen: o->peer_endpoint_ ? &addrlen : 0, ec&: 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 |
139 | |