| // |
| // reactive_serial_port_service.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2008 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/push_options.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| #include <cstring> |
| #include <string> |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #include <boost/asio/serial_port_base.hpp> |
| |
| #if defined(BOOST_ASIO_HAS_SERIAL_PORT) \ |
| && !defined(BOOST_WINDOWS) && !defined(__CYGWIN__) |
| |
| #include <boost/asio/error.hpp> |
| #include <boost/asio/io_service.hpp> |
| #include <boost/asio/detail/descriptor_ops.hpp> |
| #include <boost/asio/detail/reactive_descriptor_service.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| // Extend reactive_descriptor_service to provide serial port support. |
| template <typename Reactor> |
| class reactive_serial_port_service |
| : public boost::asio::detail::service_base< |
| reactive_serial_port_service<Reactor> > |
| { |
| public: |
| // The native type of a stream handle. |
| typedef typename reactive_descriptor_service<Reactor>::native_type |
| native_type; |
| |
| // The implementation type of the stream handle. |
| typedef typename reactive_descriptor_service<Reactor>::implementation_type |
| implementation_type; |
| |
| reactive_serial_port_service(boost::asio::io_service& io_service) |
| : boost::asio::detail::service_base< |
| reactive_serial_port_service>(io_service), |
| descriptor_service_(boost::asio::use_service< |
| reactive_descriptor_service<Reactor> >(io_service)) |
| { |
| } |
| |
| // Destroy all user-defined handler objects owned by the service. |
| void shutdown_service() |
| { |
| } |
| |
| // Construct a new handle implementation. |
| void construct(implementation_type& impl) |
| { |
| descriptor_service_.construct(impl); |
| } |
| |
| // Destroy a handle implementation. |
| void destroy(implementation_type& impl) |
| { |
| descriptor_service_.destroy(impl); |
| } |
| |
| // Open the serial port using the specified device name. |
| boost::system::error_code open(implementation_type& impl, |
| const std::string& device, boost::system::error_code& ec) |
| { |
| if (is_open(impl)) |
| { |
| ec = boost::asio::error::already_open; |
| return ec; |
| } |
| |
| 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, ignored_ec); |
| return ec; |
| } |
| |
| // Set up default serial port options. |
| termios ios; |
| descriptor_ops::clear_error(ec); |
| 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; |
| descriptor_ops::clear_error(ec); |
| s = descriptor_ops::error_wrapper(::tcsetattr(fd, TCSANOW, &ios), ec); |
| } |
| if (s < 0) |
| { |
| boost::system::error_code ignored_ec; |
| descriptor_ops::close(fd, 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, ignored_ec); |
| } |
| |
| return ec; |
| } |
| |
| // Assign a native handle to a handle implementation. |
| boost::system::error_code assign(implementation_type& impl, |
| const native_type& native_descriptor, boost::system::error_code& ec) |
| { |
| return descriptor_service_.assign(impl, native_descriptor, ec); |
| } |
| |
| // Determine whether the handle is open. |
| bool is_open(const implementation_type& impl) const |
| { |
| return descriptor_service_.is_open(impl); |
| } |
| |
| // Destroy a handle implementation. |
| boost::system::error_code close(implementation_type& impl, |
| boost::system::error_code& ec) |
| { |
| return descriptor_service_.close(impl, ec); |
| } |
| |
| // Get the native handle representation. |
| native_type native(implementation_type& impl) |
| { |
| return descriptor_service_.native(impl); |
| } |
| |
| // Cancel all operations associated with the handle. |
| 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) |
| { |
| termios ios; |
| descriptor_ops::clear_error(ec); |
| descriptor_ops::error_wrapper(::tcgetattr( |
| descriptor_service_.native(impl), &ios), ec); |
| if (ec) |
| return ec; |
| |
| if (option.store(ios, ec)) |
| return ec; |
| |
| descriptor_ops::clear_error(ec); |
| descriptor_ops::error_wrapper(::tcsetattr( |
| descriptor_service_.native(impl), TCSANOW, &ios), ec); |
| return 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 |
| { |
| termios ios; |
| descriptor_ops::clear_error(ec); |
| descriptor_ops::error_wrapper(::tcgetattr( |
| descriptor_service_.native(impl), &ios), ec); |
| if (ec) |
| return ec; |
| |
| return option.load(ios, ec); |
| } |
| |
| // Send a break sequence to the serial port. |
| boost::system::error_code send_break(implementation_type& impl, |
| boost::system::error_code& ec) |
| { |
| descriptor_ops::clear_error(ec); |
| descriptor_ops::error_wrapper(::tcsendbreak( |
| descriptor_service_.native(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: |
| // The handle service used for initiating asynchronous operations. |
| reactive_descriptor_service<Reactor>& descriptor_service_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #endif // defined(BOOST_ASIO_HAS_SERIAL_PORT) |
| // && !defined(BOOST_WINDOWS) && !defined(__CYGWIN__) |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP |