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

   1 //
   2 // detail/winrt_resolver_service.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2018 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_RESOLVER_SERVICE_HPP
  12 #define BOOST_ASIO_DETAIL_WINRT_RESOLVER_SERVICE_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/ip/basic_resolver_query.hpp>
  23 #include <boost/asio/ip/basic_resolver_results.hpp>
  24 #include <boost/asio/detail/bind_handler.hpp>
  25 #include <boost/asio/detail/memory.hpp>
  26 #include <boost/asio/detail/socket_ops.hpp>
  27 #include <boost/asio/detail/winrt_async_manager.hpp>
  28 #include <boost/asio/detail/winrt_resolve_op.hpp>
  29 #include <boost/asio/detail/winrt_utils.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>
  38 class winrt_resolver_service :
  39   public service_base<winrt_resolver_service<Protocol> >
  40 {
  41 public:
  42   // The implementation type of the resolver. A cancellation token is used to
  43   // indicate to the asynchronous operation that the operation has been
  44   // cancelled.
  45   typedef socket_ops::shared_cancel_token_type implementation_type;
  46
  47   // The endpoint type.
  48   typedef typename Protocol::endpoint endpoint_type;
  49
  50   // The query type.
  51   typedef boost::asio::ip::basic_resolver_query<Protocol> query_type;
  52
  53   // The results type.
  54   typedef boost::asio::ip::basic_resolver_results<Protocol> results_type;
  55
  56   // Constructor.
  57   winrt_resolver_service(boost::asio::io_context& io_context)
  58     : service_base<winrt_resolver_service<Protocol> >(io_context),
  59       io_context_(use_service<io_context_impl>(io_context)),
  60       async_manager_(use_service<winrt_async_manager>(io_context))
  61   {
  62   }
  63
  64   // Destructor.
  65   ~winrt_resolver_service()
  66   {
  67   }
  68
  69   // Destroy all user-defined handler objects owned by the service.
  70   void shutdown()
  71   {
  72   }
  73
  74   // Perform any fork-related housekeeping.
  75   void notify_fork(boost::asio::io_context::fork_event)
  76   {
  77   }
  78
  79   // Construct a new resolver implementation.
  80   void construct(implementation_type&)
  81   {
  82   }
  83
  84   // Move-construct a new resolver implementation.
  85   void move_construct(implementation_type&,
  86       implementation_type&)
  87   {
  88   }
  89
  90   // Move-assign from another resolver implementation.
  91   void move_assign(implementation_type&,
  92       winrt_resolver_service&, implementation_type&)
  93   {
  94   }
  95
  96   // Destroy a resolver implementation.
  97   void destroy(implementation_type&)
  98   {
  99   }
 100
 101   // Cancel pending asynchronous operations.
 102   void cancel(implementation_type&)
 103   {
 104   }
 105
 106   // Resolve a query to a list of entries.
 107   results_type resolve(implementation_type&,
 108       const query_type& query, boost::system::error_code& ec)
 109   {
 110     try
 111     {
 112       using namespace Windows::Networking::Sockets;
 113       auto endpoint_pairs = async_manager_.sync(
 114           DatagramSocket::GetEndpointPairsAsync(
 115             winrt_utils::host_name(query.host_name()),
 116             winrt_utils::string(query.service_name())), ec);
 117
 118       if (ec)
 119         return results_type();
 120
 121       return results_type::create(
 122           endpoint_pairs, query.hints(),
 123           query.host_name(), query.service_name());
 124     }
 125     catch (Platform::Exception^ e)
 126     {
 127       ec = boost::system::error_code(e->HResult,
 128           boost::system::system_category());
 129       return results_type();
 130     }
 131   }
 132
 133   // Asynchronously resolve a query to a list of entries.
 134   template <typename Handler>
 135   void async_resolve(implementation_type& impl,
 136       const query_type& query, Handler& handler)
 137   {
 138     bool is_continuation =
 139       boost_asio_handler_cont_helpers::is_continuation(handler);
 140
 141     // Allocate and construct an operation to wrap the handler.
 142     typedef winrt_resolve_op<Protocol, Handler> op;
 143     typename op::ptr p = { boost::asio::detail::addressof(handler),
 144       op::ptr::allocate(handler), 0 };
 145     p.p = new (p.v) op(query, handler);
 146
 147     BOOST_ASIO_HANDLER_CREATION((io_context_.context(),
 148           *p.p, "resolver", &impl, 0, "async_resolve"));
 149     (void)impl;
 150
 151     try
 152     {
 153       using namespace Windows::Networking::Sockets;
 154       async_manager_.async(DatagramSocket::GetEndpointPairsAsync(
 155             winrt_utils::host_name(query.host_name()),
 156             winrt_utils::string(query.service_name())), p.p);
 157       p.v = p.p = 0;
 158     }
 159     catch (Platform::Exception^ e)
 160     {
 161       p.p->ec_ = boost::system::error_code(
 162           e->HResult, boost::system::system_category());
 163       io_context_.post_immediate_completion(p.p, is_continuation);
 164       p.v = p.p = 0;
 165     }
 166   }
 167
 168   // Resolve an endpoint to a list of entries.
 169   results_type resolve(implementation_type&,
 170       const endpoint_type&, boost::system::error_code& ec)
 171   {
 172     ec = boost::asio::error::operation_not_supported;
 173     return results_type();
 174   }
 175
 176   // Asynchronously resolve an endpoint to a list of entries.
 177   template <typename Handler>
 178   void async_resolve(implementation_type&,
 179       const endpoint_type&, Handler& handler)
 180   {
 181     boost::system::error_code ec = boost::asio::error::operation_not_supported;
 182     const results_type results;
 183     io_context_.get_io_context().post(
 184         detail::bind_handler(handler, ec, results));
 185   }
 186
 187 private:
 188   io_context_impl& io_context_;
 189   winrt_async_manager& async_manager_;
 190 };
 191
 192 } // namespace detail
 193 } // namespace asio
 194 } // namespace boost
 195
 196 #include <boost/asio/detail/pop_options.hpp>
 197
 198 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 199
 200 #endif // BOOST_ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP