text: //
  // detail/impl/reactive_serial_port_service.ipp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2015 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_IMPL_REACTIVE_SERIAL_PORT_SERVICE_IPP
  #define BOOST_ASIO_DETAIL_IMPL_REACTIVE_SERIAL_PORT_SERVICE_IPP
  
  #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 <cstring>
  #include <boost/asio/detail/reactive_serial_port_service.hpp>
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace boost {
  namespace asio {
  namespace detail {
  
  reactive_serial_port_service::reactive_serial_port_service(
      boost::asio::io_service& io_service)
    : descriptor_service_(io_service)
  {
  }
  
  void reactive_serial_port_service::shutdown_service()
  {
    descriptor_service_.shutdown_service();
  }
  
  boost::system::error_code reactive_serial_port_service::open(
      reactive_serial_port_service::implementation_type& impl,
      const std::string& device, boost::system::error_code& ec)
  {
    if (is_open(impl))
    {
      ec = boost::asio::error::already_open;
      return ec;
    }
  
    descriptor_ops::state_type state = 0;
    int fd = descriptor_ops::open(device.c_str(),
        O_RDWR | O_NONBLOCK | O_NOCTTY, ec);
    if (fd < 0)
      return ec;
  
    int s = descriptor_ops::fcntl(fd, F_GETFL, ec);
    if (s >= 0)
      s = descriptor_ops::fcntl(fd, F_SETFL, s | O_NONBLOCK, ec);
    if (s < 0)
    {
      boost::system::error_code ignored_ec;
      descriptor_ops::close(fd, state, ignored_ec);
      return ec;
    }
  
    // Set up default serial port options.
    termios ios;
    errno = 0;
    s = descriptor_ops::error_wrapper(::tcgetattr(fd, &ios), ec);
    if (s >= 0)
    {
  #if defined(_BSD_SOURCE)
      ::cfmakeraw(&ios);
  #else
      ios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK
          | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
      ios.c_oflag &= ~OPOST;
      ios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
      ios.c_cflag &= ~(CSIZE | PARENB);
      ios.c_cflag |= CS8;
  #endif
      ios.c_iflag |= IGNPAR;
      ios.c_cflag |= CREAD | CLOCAL;
      errno = 0;
      s = descriptor_ops::error_wrapper(::tcsetattr(fd, TCSANOW, &ios), ec);
    }
    if (s < 0)
    {
      boost::system::error_code ignored_ec;
      descriptor_ops::close(fd, state, ignored_ec);
      return ec;
    }
  
    // We're done. Take ownership of the serial port descriptor.
    if (descriptor_service_.assign(impl, fd, ec))
    {
      boost::system::error_code ignored_ec;
      descriptor_ops::close(fd, state, ignored_ec);
    }
  
    return ec;
  }
  
  boost::system::error_code reactive_serial_port_service::do_set_option(
      reactive_serial_port_service::implementation_type& impl,
      reactive_serial_port_service::store_function_type store,
      const void* option, boost::system::error_code& ec)
  {
    termios ios;
    errno = 0;
    descriptor_ops::error_wrapper(::tcgetattr(
          descriptor_service_.native_handle(impl), &ios), ec);
    if (ec)
      return ec;
  
    if (store(option, ios, ec))
      return ec;
  
    errno = 0;
    descriptor_ops::error_wrapper(::tcsetattr(
          descriptor_service_.native_handle(impl), TCSANOW, &ios), ec);
    return ec;
  }
  
  boost::system::error_code reactive_serial_port_service::do_get_option(
      const reactive_serial_port_service::implementation_type& impl,
      reactive_serial_port_service::load_function_type load,
      void* option, boost::system::error_code& ec) const
  {
    termios ios;
    errno = 0;
    descriptor_ops::error_wrapper(::tcgetattr(
          descriptor_service_.native_handle(impl), &ios), ec);
    if (ec)
      return ec;
  
    return load(option, ios, ec);
  }
  
  } // namespace detail
  } // namespace asio
  } // namespace boost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  #endif // !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
  #endif // defined(BOOST_ASIO_HAS_SERIAL_PORT)
  
  #endif // BOOST_ASIO_DETAIL_IMPL_REACTIVE_SERIAL_PORT_SERVICE_IPP
  