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//
// detail/winrt_resolver_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 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 service_base<winrt_resolver_service<Protocol> >
{
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)
: service_base<winrt_resolver_service<Protocol> >(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&)
{
}
// Move-construct a new resolver implementation.
void move_construct(implementation_type&,
implementation_type&)
{
}
// Move-assign from another resolver implementation.
void move_assign(implementation_type&,
winrt_resolver_service&, 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
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