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//
// detail/winrt_resolver_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2016 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 BOOST_ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP
#define BOOST_ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#if defined(BOOST_ASIO_WINDOWS_RUNTIME)
#include <boost/asio/ip/basic_resolver_iterator.hpp>
#include <boost/asio/ip/basic_resolver_query.hpp>
#include <boost/asio/detail/addressof.hpp>
#include <boost/asio/detail/bind_handler.hpp>
#include <boost/asio/detail/socket_ops.hpp>
#include <boost/asio/detail/winrt_async_manager.hpp>
#include <boost/asio/detail/winrt_resolve_op.hpp>
#include <boost/asio/detail/winrt_utils.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
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 boost::asio::ip::basic_resolver_query<Protocol> query_type;
// The iterator type.
typedef boost::asio::ip::basic_resolver_iterator<Protocol> iterator_type;
// Constructor.
winrt_resolver_service(boost::asio::io_service& io_service)
: io_service_(use_service<io_service_impl>(io_service)),
async_manager_(use_service<winrt_async_manager>(io_service))
{
}
// Destructor.
~winrt_resolver_service()
{
}
// Destroy all user-defined handler objects owned by the service.
void shutdown_service()
{
}
// Perform any fork-related housekeeping.
void fork_service(boost::asio::io_service::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.
iterator_type resolve(implementation_type&,
const query_type& query, boost::system::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 iterator_type();
return iterator_type::create(
endpoint_pairs, query.hints(),
query.host_name(), query.service_name());
}
catch (Platform::Exception^ e)
{
ec = boost::system::error_code(e->HResult,
boost::system::system_category());
return iterator_type();
}
}
// Asynchronously resolve a query to a list of entries.
template <typename Handler>
void async_resolve(implementation_type&,
const query_type& query, Handler& handler)
{
bool is_continuation =
boost_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 = { boost::asio::detail::addressof(handler),
boost_asio_handler_alloc_helpers::allocate(
sizeof(op), handler), 0 };
p.p = new (p.v) op(query, handler);
BOOST_ASIO_HANDLER_CREATION((p.p, "resolver", &impl, "async_resolve"));
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_ = boost::system::error_code(
e->HResult, boost::system::system_category());
io_service_.post_immediate_completion(p.p, is_continuation);
p.v = p.p = 0;
}
}
// Resolve an endpoint to a list of entries.
iterator_type resolve(implementation_type&,
const endpoint_type&, boost::system::error_code& ec)
{
ec = boost::asio::error::operation_not_supported;
return iterator_type();
}
// Asynchronously resolve an endpoint to a list of entries.
template <typename Handler>
void async_resolve(implementation_type&,
const endpoint_type&, Handler& handler)
{
boost::system::error_code ec = boost::asio::error::operation_not_supported;
const iterator_type iterator;
io_service_.get_io_service().post(
detail::bind_handler(handler, ec, iterator));
}
private:
io_service_impl& io_service_;
winrt_async_manager& async_manager_;
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
#endif // BOOST_ASIO_DETAIL_WINRT_RESOLVER_SERVICE_HPP
|
