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1 | // |
2 | // detail/winrt_resolve_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_WINRT_RESOLVE_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_WINRT_RESOLVE_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_WINDOWS_RUNTIME) | |
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/winrt_async_op.hpp> | |
28 | #include <boost/asio/ip/basic_resolver_iterator.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 | template <typename Protocol, typename Handler> | |
38 | class winrt_resolve_op : | |
39 | public winrt_async_op< | |
40 | Windows::Foundation::Collections::IVectorView< | |
41 | Windows::Networking::EndpointPair^>^> | |
42 | { | |
43 | public: | |
44 | BOOST_ASIO_DEFINE_HANDLER_PTR(winrt_resolve_op); | |
45 | ||
46 | typedef typename Protocol::endpoint endpoint_type; | |
47 | typedef boost::asio::ip::basic_resolver_query<Protocol> query_type; | |
48 | typedef boost::asio::ip::basic_resolver_iterator<Protocol> iterator_type; | |
49 | ||
50 | winrt_resolve_op(const query_type& query, Handler& handler) | |
51 | : winrt_async_op< | |
52 | Windows::Foundation::Collections::IVectorView< | |
53 | Windows::Networking::EndpointPair^>^>( | |
54 | &winrt_resolve_op::do_complete), | |
55 | query_(query), | |
56 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) | |
57 | { | |
58 | } | |
59 | ||
60 | static void do_complete(io_service_impl* owner, operation* base, | |
61 | const boost::system::error_code&, std::size_t) | |
62 | { | |
63 | // Take ownership of the operation object. | |
64 | winrt_resolve_op* o(static_cast<winrt_resolve_op*>(base)); | |
65 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
66 | ||
67 | BOOST_ASIO_HANDLER_COMPLETION((o)); | |
68 | ||
69 | iterator_type iterator = iterator_type(); | |
70 | if (!o->ec_) | |
71 | { | |
72 | try | |
73 | { | |
74 | iterator = iterator_type::create( | |
75 | o->result_, o->query_.hints(), | |
76 | o->query_.host_name(), o->query_.service_name()); | |
77 | } | |
78 | catch (Platform::Exception^ e) | |
79 | { | |
80 | o->ec_ = boost::system::error_code(e->HResult, | |
81 | boost::system::system_category()); | |
82 | } | |
83 | } | |
84 | ||
85 | // Make a copy of the handler so that the memory can be deallocated before | |
86 | // the upcall is made. Even if we're not about to make an upcall, a | |
87 | // sub-object of the handler may be the true owner of the memory associated | |
88 | // with the handler. Consequently, a local copy of the handler is required | |
89 | // to ensure that any owning sub-object remains valid until after we have | |
90 | // deallocated the memory here. | |
91 | detail::binder2<Handler, boost::system::error_code, iterator_type> | |
92 | handler(o->handler_, o->ec_, iterator); | |
93 | p.h = boost::asio::detail::addressof(handler.handler_); | |
94 | p.reset(); | |
95 | ||
96 | // Make the upcall if required. | |
97 | if (owner) | |
98 | { | |
99 | fenced_block b(fenced_block::half); | |
100 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
101 | boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); | |
102 | BOOST_ASIO_HANDLER_INVOCATION_END; | |
103 | } | |
104 | } | |
105 | ||
106 | private: | |
107 | query_type query_; | |
108 | Handler handler_; | |
109 | }; | |
110 | ||
111 | } // namespace detail | |
112 | } // namespace asio | |
113 | } // namespace boost | |
114 | ||
115 | #include <boost/asio/detail/pop_options.hpp> | |
116 | ||
117 | #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
118 | ||
119 | #endif // BOOST_ASIO_DETAIL_WINRT_RESOLVE_OP_HPP |