text: //
  // detail/reactive_serial_port_service.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  // Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.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_REACTIVE_SERIAL_PORT_SERVICE_HPP
  #define BOOST_ASIO_DETAIL_REACTIVE_SERIAL_PORT_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_SERIAL_PORT)
  #if !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
  
  #include <string>
  #include <boost/asio/error.hpp>
  #include <boost/asio/io_service.hpp>
  #include <boost/asio/serial_port_base.hpp>
  #include <boost/asio/detail/descriptor_ops.hpp>
  #include <boost/asio/detail/reactive_descriptor_service.hpp>
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace boost {
  namespace asio {
  namespace detail {
  
  // Extend reactive_descriptor_service to provide serial port support.
  class reactive_serial_port_service
  {
  public:
    // The native type of a serial port.
    typedef reactive_descriptor_service::native_handle_type native_handle_type;
  
    // The implementation type of the serial port.
    typedef reactive_descriptor_service::implementation_type implementation_type;
  
    BOOST_ASIO_DECL reactive_serial_port_service(
        boost::asio::io_service& io_service);
  
    // Destroy all user-defined handler objects owned by the service.
    BOOST_ASIO_DECL void shutdown_service();
  
    // Construct a new serial port implementation.
    void construct(implementation_type& impl)
    {
      descriptor_service_.construct(impl);
    }
  
    // Move-construct a new serial port implementation.
    void move_construct(implementation_type& impl,
        implementation_type& other_impl)
    {
      descriptor_service_.move_construct(impl, other_impl);
    }
  
    // Move-assign from another serial port implementation.
    void move_assign(implementation_type& impl,
        reactive_serial_port_service& other_service,
        implementation_type& other_impl)
    {
      descriptor_service_.move_assign(impl,
          other_service.descriptor_service_, other_impl);
    }
  
    // Destroy a serial port implementation.
    void destroy(implementation_type& impl)
    {
      descriptor_service_.destroy(impl);
    }
  
    // Open the serial port using the specified device name.
    BOOST_ASIO_DECL boost::system::error_code open(implementation_type& impl,
        const std::string& device, boost::system::error_code& ec);
  
    // Assign a native descriptor to a serial port implementation.
    boost::system::error_code assign(implementation_type& impl,
        const native_handle_type& native_descriptor,
        boost::system::error_code& ec)
    {
      return descriptor_service_.assign(impl, native_descriptor, ec);
    }
  
    // Determine whether the serial port is open.
    bool is_open(const implementation_type& impl) const
    {
      return descriptor_service_.is_open(impl);
    }
  
    // Destroy a serial port implementation.
    boost::system::error_code close(implementation_type& impl,
        boost::system::error_code& ec)
    {
      return descriptor_service_.close(impl, ec);
    }
  
    // Get the native serial port representation.
    native_handle_type native_handle(implementation_type& impl)
    {
      return descriptor_service_.native_handle(impl);
    }
  
    // Cancel all operations associated with the serial port.
    boost::system::error_code cancel(implementation_type& impl,
        boost::system::error_code& ec)
    {
      return descriptor_service_.cancel(impl, ec);
    }
  
    // Set an option on the serial port.
    template <typename SettableSerialPortOption>
    boost::system::error_code set_option(implementation_type& impl,
        const SettableSerialPortOption& option, boost::system::error_code& ec)
    {
      return do_set_option(impl,
          &reactive_serial_port_service::store_option<SettableSerialPortOption>,
          &option, ec);
    }
  
    // Get an option from the serial port.
    template <typename GettableSerialPortOption>
    boost::system::error_code get_option(const implementation_type& impl,
        GettableSerialPortOption& option, boost::system::error_code& ec) const
    {
      return do_get_option(impl,
          &reactive_serial_port_service::load_option<GettableSerialPortOption>,
          &option, ec);
    }
  
    // Send a break sequence to the serial port.
    boost::system::error_code send_break(implementation_type& impl,
        boost::system::error_code& ec)
    {
      errno = 0;
      descriptor_ops::error_wrapper(::tcsendbreak(
            descriptor_service_.native_handle(impl), 0), ec);
      return ec;
    }
  
    // Write the given data. Returns the number of bytes sent.
    template <typename ConstBufferSequence>
    size_t write_some(implementation_type& impl,
        const ConstBufferSequence& buffers, boost::system::error_code& ec)
    {
      return descriptor_service_.write_some(impl, buffers, ec);
    }
  
    // Start an asynchronous write. The data being written must be valid for the
    // lifetime of the asynchronous operation.
    template <typename ConstBufferSequence, typename Handler>
    void async_write_some(implementation_type& impl,
        const ConstBufferSequence& buffers, Handler& handler)
    {
      descriptor_service_.async_write_some(impl, buffers, handler);
    }
  
    // Read some data. Returns the number of bytes received.
    template <typename MutableBufferSequence>
    size_t read_some(implementation_type& impl,
        const MutableBufferSequence& buffers, boost::system::error_code& ec)
    {
      return descriptor_service_.read_some(impl, buffers, ec);
    }
  
    // Start an asynchronous read. The buffer for the data being received must be
    // valid for the lifetime of the asynchronous operation.
    template <typename MutableBufferSequence, typename Handler>
    void async_read_some(implementation_type& impl,
        const MutableBufferSequence& buffers, Handler& handler)
    {
      descriptor_service_.async_read_some(impl, buffers, handler);
    }
  
  private:
    // Function pointer type for storing a serial port option.
    typedef boost::system::error_code (*store_function_type)(
        const void*, termios&, boost::system::error_code&);
  
    // Helper function template to store a serial port option.
    template <typename SettableSerialPortOption>
    static boost::system::error_code store_option(const void* option,
        termios& storage, boost::system::error_code& ec)
    {
      return static_cast<const SettableSerialPortOption*>(option)->store(
          storage, ec);
    }
  
    // Helper function to set a serial port option.
    BOOST_ASIO_DECL boost::system::error_code do_set_option(
        implementation_type& impl, store_function_type store,
        const void* option, boost::system::error_code& ec);
  
    // Function pointer type for loading a serial port option.
    typedef boost::system::error_code (*load_function_type)(
        void*, const termios&, boost::system::error_code&);
  
    // Helper function template to load a serial port option.
    template <typename GettableSerialPortOption>
    static boost::system::error_code load_option(void* option,
        const termios& storage, boost::system::error_code& ec)
    {
      return static_cast<GettableSerialPortOption*>(option)->load(storage, ec);
    }
  
    // Helper function to get a serial port option.
    BOOST_ASIO_DECL boost::system::error_code do_get_option(
        const implementation_type& impl, load_function_type load,
        void* option, boost::system::error_code& ec) const;
  
    // The implementation used for initiating asynchronous operations.
    reactive_descriptor_service descriptor_service_;
  };
  
  } // namespace detail
  } // namespace asio
  } // namespace boost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  #if defined(BOOST_ASIO_HEADER_ONLY)
  # include <boost/asio/detail/impl/reactive_serial_port_service.ipp>
  #endif // defined(BOOST_ASIO_HEADER_ONLY)
  
  #endif // !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
  #endif // defined(BOOST_ASIO_HAS_SERIAL_PORT)
  
  #endif // BOOST_ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP
  