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//
// ip/resolver_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2017 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_IP_RESOLVER_SERVICE_HPP
#define BOOST_ASIO_IP_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>
#include <boost/asio/async_result.hpp>
#include <boost/system/error_code.hpp>
#include <boost/asio/io_service.hpp>
#include <boost/asio/ip/basic_resolver_iterator.hpp>
#include <boost/asio/ip/basic_resolver_query.hpp>
#if defined(BOOST_ASIO_WINDOWS_RUNTIME)
# include <boost/asio/detail/winrt_resolver_service.hpp>
#else
# include <boost/asio/detail/resolver_service.hpp>
#endif
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace ip {
/// Default service implementation for a resolver.
template <typename InternetProtocol>
class resolver_service
#if defined(GENERATING_DOCUMENTATION)
: public boost::asio::io_service::service
#else
: public boost::asio::detail::service_base<
resolver_service<InternetProtocol> >
#endif
{
public:
#if defined(GENERATING_DOCUMENTATION)
/// The unique service identifier.
static boost::asio::io_service::id id;
#endif
/// The protocol type.
typedef InternetProtocol protocol_type;
/// The endpoint type.
typedef typename InternetProtocol::endpoint endpoint_type;
/// The query type.
typedef basic_resolver_query<InternetProtocol> query_type;
/// The iterator type.
typedef basic_resolver_iterator<InternetProtocol> iterator_type;
private:
// The type of the platform-specific implementation.
#if defined(BOOST_ASIO_WINDOWS_RUNTIME)
typedef boost::asio::detail::winrt_resolver_service<InternetProtocol>
service_impl_type;
#else
typedef boost::asio::detail::resolver_service<InternetProtocol>
service_impl_type;
#endif
public:
/// The type of a resolver implementation.
#if defined(GENERATING_DOCUMENTATION)
typedef implementation_defined implementation_type;
#else
typedef typename service_impl_type::implementation_type implementation_type;
#endif
/// Construct a new resolver service for the specified io_service.
explicit resolver_service(boost::asio::io_service& io_service)
: boost::asio::detail::service_base<
resolver_service<InternetProtocol> >(io_service),
service_impl_(io_service)
{
}
/// Construct a new resolver implementation.
void construct(implementation_type& impl)
{
service_impl_.construct(impl);
}
/// Destroy a resolver implementation.
void destroy(implementation_type& impl)
{
service_impl_.destroy(impl);
}
/// Cancel pending asynchronous operations.
void cancel(implementation_type& impl)
{
service_impl_.cancel(impl);
}
/// Resolve a query to a list of entries.
iterator_type resolve(implementation_type& impl, const query_type& query,
boost::system::error_code& ec)
{
return service_impl_.resolve(impl, query, ec);
}
/// Asynchronously resolve a query to a list of entries.
template <typename ResolveHandler>
BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,
void (boost::system::error_code, iterator_type))
async_resolve(implementation_type& impl, const query_type& query,
BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)
{
boost::asio::detail::async_result_init<
ResolveHandler, void (boost::system::error_code, iterator_type)> init(
BOOST_ASIO_MOVE_CAST(ResolveHandler)(handler));
service_impl_.async_resolve(impl, query, init.handler);
return init.result.get();
}
/// Resolve an endpoint to a list of entries.
iterator_type resolve(implementation_type& impl,
const endpoint_type& endpoint, boost::system::error_code& ec)
{
return service_impl_.resolve(impl, endpoint, ec);
}
/// Asynchronously resolve an endpoint to a list of entries.
template <typename ResolveHandler>
BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,
void (boost::system::error_code, iterator_type))
async_resolve(implementation_type& impl, const endpoint_type& endpoint,
BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)
{
boost::asio::detail::async_result_init<
ResolveHandler, void (boost::system::error_code, iterator_type)> init(
BOOST_ASIO_MOVE_CAST(ResolveHandler)(handler));
service_impl_.async_resolve(impl, endpoint, init.handler);
return init.result.get();
}
private:
// Destroy all user-defined handler objects owned by the service.
void shutdown_service()
{
service_impl_.shutdown_service();
}
// Perform any fork-related housekeeping.
void fork_service(boost::asio::io_service::fork_event event)
{
service_impl_.fork_service(event);
}
// The platform-specific implementation.
service_impl_type service_impl_;
};
} // namespace ip
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_IP_RESOLVER_SERVICE_HPP
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