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//
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// windows/random_access_handle_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_WINDOWS_RANDOM_ACCESS_HANDLE_SERVICE_HPP
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#define BOOST_ASIO_WINDOWS_RANDOM_ACCESS_HANDLE_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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#if defined(BOOST_ASIO_HAS_WINDOWS_RANDOM_ACCESS_HANDLE) \
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  || defined(GENERATING_DOCUMENTATION)
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#include <cstddef>
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#include <boost/asio/async_result.hpp>
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#include <boost/asio/detail/cstdint.hpp>
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#include <boost/asio/detail/win_iocp_handle_service.hpp>
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#include <boost/asio/error.hpp>
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#include <boost/asio/io_service.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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namespace windows {
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/// Default service implementation for a random-access handle.
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class random_access_handle_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<random_access_handle_service>
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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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private:
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  // The type of the platform-specific implementation.
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  typedef detail::win_iocp_handle_service service_impl_type;
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public:
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  /// The type of a random-access handle implementation.
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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 service_impl_type::implementation_type implementation_type;
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#endif
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  /// (Deprecated: Use native_handle_type.) The native handle type.
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#if defined(GENERATING_DOCUMENTATION)
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  typedef implementation_defined native_type;
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#else
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  typedef service_impl_type::native_handle_type native_type;
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#endif
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  /// The native handle type.
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#if defined(GENERATING_DOCUMENTATION)
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  typedef implementation_defined native_handle_type;
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#else
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  typedef service_impl_type::native_handle_type native_handle_type;
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#endif
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  /// Construct a new random-access handle service for the specified io_service.
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  explicit random_access_handle_service(boost::asio::io_service& io_service)
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    : boost::asio::detail::service_base<
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        random_access_handle_service>(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 random-access handle 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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#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
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  /// Move-construct a new random-access handle implementation.
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  void move_construct(implementation_type& impl,
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      implementation_type& other_impl)
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  {
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    service_impl_.move_construct(impl, other_impl);
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  }
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  /// Move-assign from another random-access handle implementation.
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  void move_assign(implementation_type& impl,
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      random_access_handle_service& other_service,
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      implementation_type& other_impl)
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  {
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    service_impl_.move_assign(impl, other_service.service_impl_, other_impl);
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  }
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#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
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  /// Destroy a random-access handle 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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  /// Assign an existing native handle to a random-access handle.
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  boost::system::error_code assign(implementation_type& impl,
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      const native_handle_type& handle, boost::system::error_code& ec)
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  {
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    return service_impl_.assign(impl, handle, ec);
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  }
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  /// Determine whether the handle is open.
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  bool is_open(const implementation_type& impl) const
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  {
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    return service_impl_.is_open(impl);
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  }
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  /// Close a random-access handle implementation.
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  boost::system::error_code close(implementation_type& impl,
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      boost::system::error_code& ec)
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  {
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    return service_impl_.close(impl, ec);
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  }
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  /// (Deprecated: Use native_handle().) Get the native handle implementation.
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  native_type native(implementation_type& impl)
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  {
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    return service_impl_.native_handle(impl);
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  }
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  /// Get the native handle implementation.
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  native_handle_type native_handle(implementation_type& impl)
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  {
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    return service_impl_.native_handle(impl);
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  }
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  /// Cancel all asynchronous operations associated with the handle.
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  boost::system::error_code cancel(implementation_type& impl,
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      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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  /// Write the given data at the specified offset.
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  template <typename ConstBufferSequence>
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  std::size_t write_some_at(implementation_type& impl, uint64_t offset,
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      const ConstBufferSequence& buffers, boost::system::error_code& ec)
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  {
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    return service_impl_.write_some_at(impl, offset, buffers, ec);
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  }
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  /// Start an asynchronous write at the specified offset.
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  template <typename ConstBufferSequence, typename WriteHandler>
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  BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler,
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      void (boost::system::error_code, std::size_t))
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  async_write_some_at(implementation_type& impl,
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      uint64_t offset, const ConstBufferSequence& buffers,
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      BOOST_ASIO_MOVE_ARG(WriteHandler) handler)
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  {
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    boost::asio::detail::async_result_init<
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      WriteHandler, void (boost::system::error_code, std::size_t)> init(
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        BOOST_ASIO_MOVE_CAST(WriteHandler)(handler));
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    service_impl_.async_write_some_at(impl, offset, buffers, init.handler);
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    return init.result.get();
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  }
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  /// Read some data from the specified offset.
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  template <typename MutableBufferSequence>
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  std::size_t read_some_at(implementation_type& impl, uint64_t offset,
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      const MutableBufferSequence& buffers, boost::system::error_code& ec)
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  {
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    return service_impl_.read_some_at(impl, offset, buffers, ec);
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  }
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  /// Start an asynchronous read at the specified offset.
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  template <typename MutableBufferSequence, typename ReadHandler>
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  BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
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      void (boost::system::error_code, std::size_t))
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  async_read_some_at(implementation_type& impl,
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      uint64_t offset, const MutableBufferSequence& buffers,
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      BOOST_ASIO_MOVE_ARG(ReadHandler) handler)
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  {
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    boost::asio::detail::async_result_init<
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      ReadHandler, void (boost::system::error_code, std::size_t)> init(
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        BOOST_ASIO_MOVE_CAST(ReadHandler)(handler));
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    service_impl_.async_read_some_at(impl, offset, buffers, 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 windows
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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 // defined(BOOST_ASIO_HAS_WINDOWS_RANDOM_ACCESS_HANDLE)
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       //   || defined(GENERATING_DOCUMENTATION)
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#endif // BOOST_ASIO_WINDOWS_RANDOM_ACCESS_HANDLE_SERVICE_HPP