/Src/Dependencies/Boost/boost/asio/detail/resolver_service_base.hpp
http://hadesmem.googlecode.com/ · C++ Header · 129 lines · 71 code · 30 blank · 28 comment · 2 complexity · 08eb38e7fc3378c227bddcff637f12e5 MD5 · raw file
- //
- // detail/resolver_service_base.hpp
- // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2011 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_RESOLVER_SERVICE_BASE_HPP
- #define BOOST_ASIO_DETAIL_RESOLVER_SERVICE_BASE_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/error.hpp>
- #include <boost/asio/io_service.hpp>
- #include <boost/asio/detail/mutex.hpp>
- #include <boost/asio/detail/noncopyable.hpp>
- #include <boost/asio/detail/operation.hpp>
- #include <boost/asio/detail/socket_ops.hpp>
- #include <boost/asio/detail/socket_types.hpp>
- #include <boost/asio/detail/scoped_ptr.hpp>
- #include <boost/asio/detail/thread.hpp>
- #include <boost/asio/detail/push_options.hpp>
- namespace boost {
- namespace asio {
- namespace detail {
- class resolver_service_base
- {
- public:
- // The implementation type of the resolver. A cancellation token is used to
- // indicate to the background thread that the operation has been cancelled.
- typedef socket_ops::shared_cancel_token_type implementation_type;
- // Constructor.
- BOOST_ASIO_DECL resolver_service_base(boost::asio::io_service& io_service);
- // Destructor.
- BOOST_ASIO_DECL ~resolver_service_base();
- // Destroy all user-defined handler objects owned by the service.
- BOOST_ASIO_DECL void shutdown_service();
- // Perform any fork-related housekeeping.
- BOOST_ASIO_DECL void fork_service(
- boost::asio::io_service::fork_event fork_ev);
- // Construct a new resolver implementation.
- BOOST_ASIO_DECL void construct(implementation_type& impl);
- // Destroy a resolver implementation.
- BOOST_ASIO_DECL void destroy(implementation_type&);
- // Cancel pending asynchronous operations.
- BOOST_ASIO_DECL void cancel(implementation_type& impl);
- protected:
- // Helper function to start an asynchronous resolve operation.
- BOOST_ASIO_DECL void start_resolve_op(operation* op);
- // Helper class to perform exception-safe cleanup of addrinfo objects.
- class auto_addrinfo
- : private boost::asio::detail::noncopyable
- {
- public:
- explicit auto_addrinfo(boost::asio::detail::addrinfo_type* ai)
- : ai_(ai)
- {
- }
- ~auto_addrinfo()
- {
- if (ai_)
- socket_ops::freeaddrinfo(ai_);
- }
- operator boost::asio::detail::addrinfo_type*()
- {
- return ai_;
- }
- private:
- boost::asio::detail::addrinfo_type* ai_;
- };
- // Helper class to run the work io_service in a thread.
- class work_io_service_runner;
- // Start the work thread if it's not already running.
- BOOST_ASIO_DECL void start_work_thread();
- // The io_service implementation used to post completions.
- io_service_impl& io_service_impl_;
- private:
- // Mutex to protect access to internal data.
- boost::asio::detail::mutex mutex_;
- // Private io_service used for performing asynchronous host resolution.
- boost::asio::detail::scoped_ptr<boost::asio::io_service> work_io_service_;
- // The work io_service implementation used to post completions.
- io_service_impl& work_io_service_impl_;
- // Work for the private io_service to perform.
- boost::asio::detail::scoped_ptr<boost::asio::io_service::work> work_;
- // Thread used for running the work io_service's run loop.
- boost::asio::detail::scoped_ptr<boost::asio::detail::thread> work_thread_;
- };
- } // namespace detail
- } // namespace asio
- } // namespace boost
- #include <boost/asio/detail/pop_options.hpp>
- #if defined(BOOST_ASIO_HEADER_ONLY)
- # include <boost/asio/detail/impl/resolver_service_base.ipp>
- #endif // defined(BOOST_ASIO_HEADER_ONLY)
- #endif // BOOST_ASIO_DETAIL_RESOLVER_SERVICE_BASE_HPP