| // |
| // detail/winrt_resolver_service.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP |
| #define ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| |
| #if defined(ASIO_WINDOWS_RUNTIME) |
| |
| #include "asio/ip/basic_resolver_query.hpp" |
| #include "asio/ip/basic_resolver_results.hpp" |
| #include "asio/detail/bind_handler.hpp" |
| #include "asio/detail/memory.hpp" |
| #include "asio/detail/socket_ops.hpp" |
| #include "asio/detail/winrt_async_manager.hpp" |
| #include "asio/detail/winrt_resolve_op.hpp" |
| #include "asio/detail/winrt_utils.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename Protocol> |
| class winrt_resolver_service |
| { |
| public: |
| // The implementation type of the resolver. A cancellation token is used to |
| // indicate to the asynchronous operation that the operation has been |
| // cancelled. |
| typedef socket_ops::shared_cancel_token_type implementation_type; |
| |
| // The endpoint type. |
| typedef typename Protocol::endpoint endpoint_type; |
| |
| // The query type. |
| typedef asio::ip::basic_resolver_query<Protocol> query_type; |
| |
| // The results type. |
| typedef asio::ip::basic_resolver_results<Protocol> results_type; |
| |
| // Constructor. |
| winrt_resolver_service(asio::io_context& io_context) |
| : io_context_(use_service<io_context_impl>(io_context)), |
| async_manager_(use_service<winrt_async_manager>(io_context)) |
| { |
| } |
| |
| // Destructor. |
| ~winrt_resolver_service() |
| { |
| } |
| |
| // Destroy all user-defined handler objects owned by the service. |
| void shutdown() |
| { |
| } |
| |
| // Perform any fork-related housekeeping. |
| void notify_fork(asio::io_context::fork_event) |
| { |
| } |
| |
| // Construct a new resolver implementation. |
| void construct(implementation_type&) |
| { |
| } |
| |
| // Destroy a resolver implementation. |
| void destroy(implementation_type&) |
| { |
| } |
| |
| // Cancel pending asynchronous operations. |
| void cancel(implementation_type&) |
| { |
| } |
| |
| // Resolve a query to a list of entries. |
| results_type resolve(implementation_type&, |
| const query_type& query, asio::error_code& ec) |
| { |
| try |
| { |
| using namespace Windows::Networking::Sockets; |
| auto endpoint_pairs = async_manager_.sync( |
| DatagramSocket::GetEndpointPairsAsync( |
| winrt_utils::host_name(query.host_name()), |
| winrt_utils::string(query.service_name())), ec); |
| |
| if (ec) |
| return results_type(); |
| |
| return results_type::create( |
| endpoint_pairs, query.hints(), |
| query.host_name(), query.service_name()); |
| } |
| catch (Platform::Exception^ e) |
| { |
| ec = asio::error_code(e->HResult, |
| asio::system_category()); |
| return results_type(); |
| } |
| } |
| |
| // Asynchronously resolve a query to a list of entries. |
| template <typename Handler> |
| void async_resolve(implementation_type& impl, |
| const query_type& query, Handler& handler) |
| { |
| bool is_continuation = |
| asio_handler_cont_helpers::is_continuation(handler); |
| |
| // Allocate and construct an operation to wrap the handler. |
| typedef winrt_resolve_op<Protocol, Handler> op; |
| typename op::ptr p = { asio::detail::addressof(handler), |
| op::ptr::allocate(handler), 0 }; |
| p.p = new (p.v) op(query, handler); |
| |
| ASIO_HANDLER_CREATION((io_context_.context(), |
| *p.p, "resolver", &impl, 0, "async_resolve")); |
| (void)impl; |
| |
| try |
| { |
| using namespace Windows::Networking::Sockets; |
| async_manager_.async(DatagramSocket::GetEndpointPairsAsync( |
| winrt_utils::host_name(query.host_name()), |
| winrt_utils::string(query.service_name())), p.p); |
| p.v = p.p = 0; |
| } |
| catch (Platform::Exception^ e) |
| { |
| p.p->ec_ = asio::error_code( |
| e->HResult, asio::system_category()); |
| io_context_.post_immediate_completion(p.p, is_continuation); |
| p.v = p.p = 0; |
| } |
| } |
| |
| // Resolve an endpoint to a list of entries. |
| results_type resolve(implementation_type&, |
| const endpoint_type&, asio::error_code& ec) |
| { |
| ec = asio::error::operation_not_supported; |
| return results_type(); |
| } |
| |
| // Asynchronously resolve an endpoint to a list of entries. |
| template <typename Handler> |
| void async_resolve(implementation_type&, |
| const endpoint_type&, Handler& handler) |
| { |
| asio::error_code ec = asio::error::operation_not_supported; |
| const results_type results; |
| io_context_.get_io_context().post( |
| detail::bind_handler(handler, ec, results)); |
| } |
| |
| private: |
| io_context_impl& io_context_; |
| winrt_async_manager& async_manager_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // defined(ASIO_WINDOWS_RUNTIME) |
| |
| #endif // ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP |