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

   1 //
   2 // detail/winrt_resolve_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 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/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/memory.hpp>
  27 #include <boost/asio/detail/winrt_async_op.hpp>
  28 #include <boost/asio/ip/basic_resolver_results.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_results<Protocol> results_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     handler_work<Handler>::start(handler_);
  59   }
  60
  61   static void do_complete(void* owner, operation* base,
  62       const boost::system::error_code&, std::size_t)
  63   {
  64     // Take ownership of the operation object.
  65     winrt_resolve_op* o(static_cast<winrt_resolve_op*>(base));
  66     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  67     handler_work<Handler> w(o->handler_);
  68
  69     BOOST_ASIO_HANDLER_COMPLETION((*o));
  70
  71     results_type results = results_type();
  72     if (!o->ec_)
  73     {
  74       try
  75       {
  76         results = results_type::create(o->result_, o->query_.hints(),
  77             o->query_.host_name(), o->query_.service_name());
  78       }
  79       catch (Platform::Exception^ e)
  80       {
  81         o->ec_ = boost::system::error_code(e->HResult,
  82             boost::system::system_category());
  83       }
  84     }
  85
  86     // Make a copy of the handler so that the memory can be deallocated before
  87     // the upcall is made. Even if we're not about to make an upcall, a
  88     // sub-object of the handler may be the true owner of the memory associated
  89     // with the handler. Consequently, a local copy of the handler is required
  90     // to ensure that any owning sub-object remains valid until after we have
  91     // deallocated the memory here.
  92     detail::binder2<Handler, boost::system::error_code, results_type>
  93       handler(o->handler_, o->ec_, results);
  94     p.h = boost::asio::detail::addressof(handler.handler_);
  95     p.reset();
  96
  97     // Make the upcall if required.
  98     if (owner)
  99     {
 100       fenced_block b(fenced_block::half);
 101       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, "..."));
 102       w.complete(handler, handler.handler_);
 103       BOOST_ASIO_HANDLER_INVOCATION_END;
 104     }
 105   }
 106
 107 private:
 108   query_type query_;
 109   Handler handler_;
 110 };
 111
 112 } // namespace detail
 113 } // namespace asio
 114 } // namespace boost
 115
 116 #include <boost/asio/detail/pop_options.hpp>
 117
 118 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 119
 120 #endif // BOOST_ASIO_DETAIL_WINRT_RESOLVE_OP_HPP