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

   1 //
   2 // detail/winrt_resolve_op.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 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, typename IoExecutor>
  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,
  51       Handler& handler, const IoExecutor& io_ex)
  52     : winrt_async_op<
  53         Windows::Foundation::Collections::IVectorView<
  54           Windows::Networking::EndpointPair^>^>(
  55             &winrt_resolve_op::do_complete),
  56       query_(query),
  57       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
  58       io_executor_(io_ex)
  59   {
  60     handler_work<Handler, IoExecutor>::start(handler_, io_executor_);
  61   }
  62
  63   static void do_complete(void* owner, operation* base,
  64       const boost::system::error_code&, std::size_t)
  65   {
  66     // Take ownership of the operation object.
  67     winrt_resolve_op* o(static_cast<winrt_resolve_op*>(base));
  68     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
  69     handler_work<Handler, IoExecutor> w(o->handler_, o->io_executor_);
  70
  71     BOOST_ASIO_HANDLER_COMPLETION((*o));
  72
  73     results_type results = results_type();
  74     if (!o->ec_)
  75     {
  76       try
  77       {
  78         results = results_type::create(o->result_, o->query_.hints(),
  79             o->query_.host_name(), o->query_.service_name());
  80       }
  81       catch (Platform::Exception^ e)
  82       {
  83         o->ec_ = boost::system::error_code(e->HResult,
  84             boost::system::system_category());
  85       }
  86     }
  87
  88     // Make a copy of the handler so that the memory can be deallocated before
  89     // the upcall is made. Even if we're not about to make an upcall, a
  90     // sub-object of the handler may be the true owner of the memory associated
  91     // with the handler. Consequently, a local copy of the handler is required
  92     // to ensure that any owning sub-object remains valid until after we have
  93     // deallocated the memory here.
  94     detail::binder2<Handler, boost::system::error_code, results_type>
  95       handler(o->handler_, o->ec_, results);
  96     p.h = boost::asio::detail::addressof(handler.handler_);
  97     p.reset();
  98
  99     // Make the upcall if required.
 100     if (owner)
 101     {
 102       fenced_block b(fenced_block::half);
 103       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, "..."));
 104       w.complete(handler, handler.handler_);
 105       BOOST_ASIO_HANDLER_INVOCATION_END;
 106     }
 107   }
 108
 109 private:
 110   query_type query_;
 111   Handler handler_;
 112   IoExecutor io_executor_;
 113 };
 114
 115 } // namespace detail
 116 } // namespace asio
 117 } // namespace boost
 118
 119 #include <boost/asio/detail/pop_options.hpp>
 120
 121 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 122
 123 #endif // BOOST_ASIO_DETAIL_WINRT_RESOLVE_OP_HPP