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//
// ip/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_IP_RESOLVER_SERVICE_HPP
#define ASIO_IP_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_ENABLE_OLD_SERVICES)
#include "asio/async_result.hpp"
#include "asio/error_code.hpp"
#include "asio/io_context.hpp"
#include "asio/ip/basic_resolver_iterator.hpp"
#include "asio/ip/basic_resolver_query.hpp"
#include "asio/ip/basic_resolver_results.hpp"
#if defined(ASIO_WINDOWS_RUNTIME)
# include "asio/detail/winrt_resolver_service.hpp"
#else
# include "asio/detail/resolver_service.hpp"
#endif
#include "asio/detail/push_options.hpp"
namespace asio {
namespace ip {
/// Default service implementation for a resolver.
template <typename InternetProtocol>
class resolver_service
#if defined(GENERATING_DOCUMENTATION)
: public asio::io_context::service
#else
: public asio::detail::service_base<
resolver_service<InternetProtocol> >
#endif
{
public:
#if defined(GENERATING_DOCUMENTATION)
/// The unique service identifier.
static asio::io_context::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;
/// The results type.
typedef basic_resolver_results<InternetProtocol> results_type;
private:
// The type of the platform-specific implementation.
#if defined(ASIO_WINDOWS_RUNTIME)
typedef asio::detail::winrt_resolver_service<InternetProtocol>
service_impl_type;
#else
typedef 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_context.
explicit resolver_service(asio::io_context& io_context)
: asio::detail::service_base<
resolver_service<InternetProtocol> >(io_context),
service_impl_(io_context)
{
}
/// Construct a new resolver implementation.
void construct(implementation_type& impl)
{
service_impl_.construct(impl);
}
#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// Move-construct a new resolver implementation.
void move_construct(implementation_type& impl,
implementation_type& other_impl)
{
service_impl_.move_construct(impl, other_impl);
}
/// Move-assign from another resolver implementation.
void move_assign(implementation_type& impl,
resolver_service& other_service,
implementation_type& other_impl)
{
service_impl_.move_assign(impl, other_service.service_impl_, other_impl);
}
#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// 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.
results_type resolve(implementation_type& impl, const query_type& query,
asio::error_code& ec)
{
return service_impl_.resolve(impl, query, ec);
}
/// Asynchronously resolve a query to a list of entries.
template <typename ResolveHandler>
ASIO_INITFN_RESULT_TYPE(ResolveHandler,
void (asio::error_code, results_type))
async_resolve(implementation_type& impl, const query_type& query,
ASIO_MOVE_ARG(ResolveHandler) handler)
{
asio::async_completion<ResolveHandler,
void (asio::error_code, results_type)> init(handler);
service_impl_.async_resolve(impl, query, init.completion_handler);
return init.result.get();
}
/// Resolve an endpoint to a list of entries.
results_type resolve(implementation_type& impl,
const endpoint_type& endpoint, asio::error_code& ec)
{
return service_impl_.resolve(impl, endpoint, ec);
}
/// Asynchronously resolve an endpoint to a list of entries.
template <typename ResolveHandler>
ASIO_INITFN_RESULT_TYPE(ResolveHandler,
void (asio::error_code, results_type))
async_resolve(implementation_type& impl, const endpoint_type& endpoint,
ASIO_MOVE_ARG(ResolveHandler) handler)
{
asio::async_completion<ResolveHandler,
void (asio::error_code, results_type)> init(handler);
service_impl_.async_resolve(impl, endpoint, init.completion_handler);
return init.result.get();
}
private:
// Destroy all user-defined handler objects owned by the service.
void shutdown()
{
service_impl_.shutdown();
}
// Perform any fork-related housekeeping.
void notify_fork(asio::io_context::fork_event event)
{
service_impl_.notify_fork(event);
}
// The platform-specific implementation.
service_impl_type service_impl_;
};
} // namespace ip
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // defined(ASIO_ENABLE_OLD_SERVICES)
#endif // ASIO_IP_RESOLVER_SERVICE_HPP
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