//
// deadline_timer_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2006 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_DEADLINE_TIMER_SERVICE_HPP
#define BOOST_ASIO_DEADLINE_TIMER_SERVICE_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include <boost/asio/detail/push_options.hpp>

#include <boost/asio/detail/push_options.hpp>
#include <cstddef>
#include <boost/config.hpp>
#include <boost/asio/detail/pop_options.hpp>

#include <boost/asio/io_service.hpp>
#include <boost/asio/time_traits.hpp>
#include <boost/asio/detail/epoll_reactor.hpp>
#include <boost/asio/detail/kqueue_reactor.hpp>
#include <boost/asio/detail/select_reactor.hpp>
#include <boost/asio/detail/reactive_deadline_timer_service.hpp>

namespace boost {
namespace asio {

/// Default service implementation for a timer.
template <typename Time_Type,
    typename Time_Traits = boost::asio::time_traits<Time_Type> >
class deadline_timer_service
  : public boost::asio::io_service::service
{
public:
  /// The time traits type.
  typedef Time_Traits traits_type;

  /// The time type.
  typedef typename traits_type::time_type time_type;

  /// The duration type.
  typedef typename traits_type::duration_type duration_type;

private:
  // The type of the platform-specific implementation.
#if defined(BOOST_ASIO_HAS_IOCP)
  typedef detail::reactive_deadline_timer_service<
    traits_type, detail::select_reactor<true> > service_impl_type;
#elif defined(BOOST_ASIO_HAS_EPOLL)
  typedef detail::reactive_deadline_timer_service<
    traits_type, detail::epoll_reactor<false> > service_impl_type;
#elif defined(BOOST_ASIO_HAS_KQUEUE)
  typedef detail::reactive_deadline_timer_service<
    traits_type, detail::kqueue_reactor<false> > service_impl_type;
#else
  typedef detail::reactive_deadline_timer_service<
    traits_type, detail::select_reactor<false> > service_impl_type;
#endif

public:
  /// The implementation type of the deadline timer.
#if defined(GENERATING_DOCUMENTATION)
  typedef implementation_defined implementation_type;
#else
  typedef typename service_impl_type::implementation_type implementation_type;
#endif

  /// Construct a new timer service for the specified io_service.
  explicit deadline_timer_service(boost::asio::io_service& io_service)
    : boost::asio::io_service::service(io_service),
      service_impl_(boost::asio::use_service<service_impl_type>(io_service))
  {
  }

  /// Destroy all user-defined handler objects owned by the service.
  void shutdown_service()
  {
  }

  /// Construct a new timer implementation.
  void construct(implementation_type& impl)
  {
    service_impl_.construct(impl);
  }

  /// Destroy a timer implementation.
  void destroy(implementation_type& impl)
  {
    service_impl_.destroy(impl);
  }

  /// Cancel any asynchronous wait operations associated with the timer.
  std::size_t cancel(implementation_type& impl)
  {
    return service_impl_.cancel(impl);
  }

  /// Get the expiry time for the timer as an absolute time.
  time_type expires_at(const implementation_type& impl) const
  {
    return service_impl_.expires_at(impl);
  }

  /// Set the expiry time for the timer as an absolute time.
  std::size_t expires_at(implementation_type& impl,
      const time_type& expiry_time)
  {
    return service_impl_.expires_at(impl, expiry_time);
  }

  /// Get the expiry time for the timer relative to now.
  duration_type expires_from_now(const implementation_type& impl) const
  {
    return service_impl_.expires_from_now(impl);
  }

  /// Set the expiry time for the timer relative to now.
  std::size_t expires_from_now(implementation_type& impl,
      const duration_type& expiry_time)
  {
    return service_impl_.expires_from_now(impl, expiry_time);
  }

  // Perform a blocking wait on the timer.
  void wait(implementation_type& impl)
  {
    service_impl_.wait(impl);
  }

  // Start an asynchronous wait on the timer.
  template <typename Handler>
  void async_wait(implementation_type& impl, Handler handler)
  {
    service_impl_.async_wait(impl, handler);
  }

private:
  // The service that provides the platform-specific implementation.
  service_impl_type& service_impl_;
};

} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#endif // BOOST_ASIO_DEADLINE_TIMER_SERVICE_HPP