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//
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// waitable_timer_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_WAITABLE_TIMER_SERVICE_HPP
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#define BOOST_ASIO_WAITABLE_TIMER_SERVICE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#include <cstddef>
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#include <boost/asio/async_result.hpp>
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#include <boost/asio/detail/chrono_time_traits.hpp>
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#include <boost/asio/detail/deadline_timer_service.hpp>
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#include <boost/asio/io_service.hpp>
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#include <boost/asio/wait_traits.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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/// Default service implementation for a timer.
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template <typename Clock,
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    typename WaitTraits = boost::asio::wait_traits<Clock> >
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class waitable_timer_service
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#if defined(GENERATING_DOCUMENTATION)
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  : public boost::asio::io_service::service
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#else
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  : public boost::asio::detail::service_base<
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      waitable_timer_service<Clock, WaitTraits> >
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#endif
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{
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public:
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#if defined(GENERATING_DOCUMENTATION)
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  /// The unique service identifier.
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  static boost::asio::io_service::id id;
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#endif
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  /// The clock type.
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  typedef Clock clock_type;
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  /// The duration type of the clock.
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  typedef typename clock_type::duration duration;
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  /// The time point type of the clock.
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  typedef typename clock_type::time_point time_point;
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  /// The wait traits type.
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  typedef WaitTraits traits_type;
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private:
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  // The type of the platform-specific implementation.
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  typedef detail::deadline_timer_service<
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    detail::chrono_time_traits<Clock, WaitTraits> > service_impl_type;
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public:
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  /// The implementation type of the waitable timer.
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#if defined(GENERATING_DOCUMENTATION)
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  typedef implementation_defined implementation_type;
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#else
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  typedef typename service_impl_type::implementation_type implementation_type;
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#endif
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  /// Construct a new timer service for the specified io_service.
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  explicit waitable_timer_service(boost::asio::io_service& io_service)
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    : boost::asio::detail::service_base<
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        waitable_timer_service<Clock, WaitTraits> >(io_service),
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      service_impl_(io_service)
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  {
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  }
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  /// Construct a new timer implementation.
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  void construct(implementation_type& impl)
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  {
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    service_impl_.construct(impl);
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  }
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  /// Destroy a timer implementation.
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  void destroy(implementation_type& impl)
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  {
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    service_impl_.destroy(impl);
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  }
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  /// Cancel any asynchronous wait operations associated with the timer.
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  std::size_t cancel(implementation_type& impl, boost::system::error_code& ec)
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  {
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    return service_impl_.cancel(impl, ec);
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  }
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  /// Cancels one asynchronous wait operation associated with the timer.
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  std::size_t cancel_one(implementation_type& impl,
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      boost::system::error_code& ec)
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  {
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    return service_impl_.cancel_one(impl, ec);
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  }
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  /// Get the expiry time for the timer as an absolute time.
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  time_point expires_at(const implementation_type& impl) const
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  {
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    return service_impl_.expires_at(impl);
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  }
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  /// Set the expiry time for the timer as an absolute time.
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  std::size_t expires_at(implementation_type& impl,
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      const time_point& expiry_time, boost::system::error_code& ec)
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  {
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    return service_impl_.expires_at(impl, expiry_time, ec);
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  }
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  /// Get the expiry time for the timer relative to now.
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  duration expires_from_now(const implementation_type& impl) const
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  {
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    return service_impl_.expires_from_now(impl);
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  }
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  /// Set the expiry time for the timer relative to now.
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  std::size_t expires_from_now(implementation_type& impl,
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      const duration& expiry_time, boost::system::error_code& ec)
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  {
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    return service_impl_.expires_from_now(impl, expiry_time, ec);
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  }
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  // Perform a blocking wait on the timer.
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  void wait(implementation_type& impl, boost::system::error_code& ec)
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  {
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    service_impl_.wait(impl, ec);
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  }
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  // Start an asynchronous wait on the timer.
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  template <typename WaitHandler>
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  BOOST_ASIO_INITFN_RESULT_TYPE(WaitHandler,
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      void (boost::system::error_code))
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  async_wait(implementation_type& impl,
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      BOOST_ASIO_MOVE_ARG(WaitHandler) handler)
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  {
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    detail::async_result_init<
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      WaitHandler, void (boost::system::error_code)> init(
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        BOOST_ASIO_MOVE_CAST(WaitHandler)(handler));
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    service_impl_.async_wait(impl, init.handler);
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    return init.result.get();
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  }
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private:
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  // Destroy all user-defined handler objects owned by the service.
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  void shutdown_service()
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  {
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    service_impl_.shutdown_service();
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  }
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  // The platform-specific implementation.
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  service_impl_type service_impl_;
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};
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // BOOST_ASIO_WAITABLE_TIMER_SERVICE_HPP