text: //
  // windows/object_handle_service.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  // Copyright (c) 2011 Boris Schaeling (boris@highscore.de)
  //
  // 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_WINDOWS_OBJECT_HANDLE_SERVICE_HPP
  #define BOOST_ASIO_WINDOWS_OBJECT_HANDLE_SERVICE_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include <boost/asio/detail/config.hpp>
  
  #if defined(BOOST_ASIO_HAS_WINDOWS_OBJECT_HANDLE) \
    || defined(GENERATING_DOCUMENTATION)
  
  #include <boost/asio/async_result.hpp>
  #include <boost/asio/detail/win_object_handle_service.hpp>
  #include <boost/asio/error.hpp>
  #include <boost/asio/io_service.hpp>
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace boost {
  namespace asio {
  namespace windows {
  
  /// Default service implementation for an object handle.
  class object_handle_service
  #if defined(GENERATING_DOCUMENTATION)
    : public boost::asio::io_service::service
  #else
    : public boost::asio::detail::service_base<object_handle_service>
  #endif
  {
  public:
  #if defined(GENERATING_DOCUMENTATION)
    /// The unique service identifier.
    static boost::asio::io_service::id id;
  #endif
  
  private:
    // The type of the platform-specific implementation.
    typedef detail::win_object_handle_service service_impl_type;
  
  public:
    /// The type of an object handle implementation.
  #if defined(GENERATING_DOCUMENTATION)
    typedef implementation_defined implementation_type;
  #else
    typedef service_impl_type::implementation_type implementation_type;
  #endif
  
    /// The native handle type.
  #if defined(GENERATING_DOCUMENTATION)
    typedef implementation_defined native_handle_type;
  #else
    typedef service_impl_type::native_handle_type native_handle_type;
  #endif
  
    /// Construct a new object handle service for the specified io_service.
    explicit object_handle_service(boost::asio::io_service& io_service)
      : boost::asio::detail::service_base<object_handle_service>(io_service),
        service_impl_(io_service)
    {
    }
  
    /// Construct a new object handle implementation.
    void construct(implementation_type& impl)
    {
      service_impl_.construct(impl);
    }
  
  #if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
    /// Move-construct a new object handle implementation.
    void move_construct(implementation_type& impl,
        implementation_type& other_impl)
    {
      service_impl_.move_construct(impl, other_impl);
    }
  
    /// Move-assign from another object handle implementation.
    void move_assign(implementation_type& impl,
        object_handle_service& other_service,
        implementation_type& other_impl)
    {
      service_impl_.move_assign(impl, other_service.service_impl_, other_impl);
    }
  #endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
  
    /// Destroy an object handle implementation.
    void destroy(implementation_type& impl)
    {
      service_impl_.destroy(impl);
    }
  
    /// Assign an existing native handle to an object handle.
    boost::system::error_code assign(implementation_type& impl,
        const native_handle_type& handle, boost::system::error_code& ec)
    {
      return service_impl_.assign(impl, handle, ec);
    }
  
    /// Determine whether the handle is open.
    bool is_open(const implementation_type& impl) const
    {
      return service_impl_.is_open(impl);
    }
  
    /// Close an object handle implementation.
    boost::system::error_code close(implementation_type& impl,
        boost::system::error_code& ec)
    {
      return service_impl_.close(impl, ec);
    }
  
    /// Get the native handle implementation.
    native_handle_type native_handle(implementation_type& impl)
    {
      return service_impl_.native_handle(impl);
    }
  
    /// Cancel all asynchronous operations associated with the handle.
    boost::system::error_code cancel(implementation_type& impl,
        boost::system::error_code& ec)
    {
      return service_impl_.cancel(impl, ec);
    }
  
    // Wait for a signaled state.
    void wait(implementation_type& impl, boost::system::error_code& ec)
    {
      service_impl_.wait(impl, ec);
    }
  
    /// Start an asynchronous wait.
    template <typename WaitHandler>
    BOOST_ASIO_INITFN_RESULT_TYPE(WaitHandler,
        void (boost::system::error_code))
    async_wait(implementation_type& impl,
        BOOST_ASIO_MOVE_ARG(WaitHandler) handler)
    {
      boost::asio::detail::async_result_init<
        WaitHandler, void (boost::system::error_code)> init(
          BOOST_ASIO_MOVE_CAST(WaitHandler)(handler));
  
      service_impl_.async_wait(impl, init.handler);
  
      return init.result.get();
    }
  
  private:
    // Destroy all user-defined handler objects owned by the service.
    void shutdown_service()
    {
      service_impl_.shutdown_service();
    }
  
    // The platform-specific implementation.
    service_impl_type service_impl_;
  };
  
  } // namespace windows
  } // namespace asio
  } // namespace boost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  #endif // defined(BOOST_ASIO_HAS_WINDOWS_OBJECT_HANDLE)
         //   || defined(GENERATING_DOCUMENTATION)
  
  #endif // BOOST_ASIO_WINDOWS_OBJECT_HANDLE_SERVICE_HPP
  