ceph/src/boost/boost/asio/detail/reactive_serial_port_service.hpp

   1 //
   2 // detail/reactive_serial_port_service.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 // Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.com)
   7 //
   8 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   9 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11
  12 #ifndef BOOST_ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP
  13 #define BOOST_ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP
  14
  15 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  16 # pragma once
  17 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  18
  19 #include <boost/asio/detail/config.hpp>
  20
  21 #if defined(BOOST_ASIO_HAS_SERIAL_PORT)
  22 #if !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
  23
  24 #include <string>
  25 #include <boost/asio/error.hpp>
  26 #include <boost/asio/execution_context.hpp>
  27 #include <boost/asio/serial_port_base.hpp>
  28 #include <boost/asio/detail/descriptor_ops.hpp>
  29 #include <boost/asio/detail/reactive_descriptor_service.hpp>
  30
  31 #include <boost/asio/detail/push_options.hpp>
  32
  33 namespace boost {
  34 namespace asio {
  35 namespace detail {
  36
  37 // Extend reactive_descriptor_service to provide serial port support.
  38 class reactive_serial_port_service :
  39   public execution_context_service_base<reactive_serial_port_service>
  40 {
  41 public:
  42   // The native type of a serial port.
  43   typedef reactive_descriptor_service::native_handle_type native_handle_type;
  44
  45   // The implementation type of the serial port.
  46   typedef reactive_descriptor_service::implementation_type implementation_type;
  47
  48   BOOST_ASIO_DECL reactive_serial_port_service(execution_context& context);
  49
  50   // Destroy all user-defined handler objects owned by the service.
  51   BOOST_ASIO_DECL void shutdown();
  52
  53   // Construct a new serial port implementation.
  54   void construct(implementation_type& impl)
  55   {
  56     descriptor_service_.construct(impl);
  57   }
  58
  59   // Move-construct a new serial port implementation.
  60   void move_construct(implementation_type& impl,
  61       implementation_type& other_impl)
  62   {
  63     descriptor_service_.move_construct(impl, other_impl);
  64   }
  65
  66   // Move-assign from another serial port implementation.
  67   void move_assign(implementation_type& impl,
  68       reactive_serial_port_service& other_service,
  69       implementation_type& other_impl)
  70   {
  71     descriptor_service_.move_assign(impl,
  72         other_service.descriptor_service_, other_impl);
  73   }
  74
  75   // Destroy a serial port implementation.
  76   void destroy(implementation_type& impl)
  77   {
  78     descriptor_service_.destroy(impl);
  79   }
  80
  81   // Open the serial port using the specified device name.
  82   BOOST_ASIO_DECL boost::system::error_code open(implementation_type& impl,
  83       const std::string& device, boost::system::error_code& ec);
  84
  85   // Assign a native descriptor to a serial port implementation.
  86   boost::system::error_code assign(implementation_type& impl,
  87       const native_handle_type& native_descriptor,
  88       boost::system::error_code& ec)
  89   {
  90     return descriptor_service_.assign(impl, native_descriptor, ec);
  91   }
  92
  93   // Determine whether the serial port is open.
  94   bool is_open(const implementation_type& impl) const
  95   {
  96     return descriptor_service_.is_open(impl);
  97   }
  98
  99   // Destroy a serial port implementation.
 100   boost::system::error_code close(implementation_type& impl,
 101       boost::system::error_code& ec)
 102   {
 103     return descriptor_service_.close(impl, ec);
 104   }
 105
 106   // Get the native serial port representation.
 107   native_handle_type native_handle(implementation_type& impl)
 108   {
 109     return descriptor_service_.native_handle(impl);
 110   }
 111
 112   // Cancel all operations associated with the serial port.
 113   boost::system::error_code cancel(implementation_type& impl,
 114       boost::system::error_code& ec)
 115   {
 116     return descriptor_service_.cancel(impl, ec);
 117   }
 118
 119   // Set an option on the serial port.
 120   template <typename SettableSerialPortOption>
 121   boost::system::error_code set_option(implementation_type& impl,
 122       const SettableSerialPortOption& option, boost::system::error_code& ec)
 123   {
 124     return do_set_option(impl,
 125         &reactive_serial_port_service::store_option<SettableSerialPortOption>,
 126         &option, ec);
 127   }
 128
 129   // Get an option from the serial port.
 130   template <typename GettableSerialPortOption>
 131   boost::system::error_code get_option(const implementation_type& impl,
 132       GettableSerialPortOption& option, boost::system::error_code& ec) const
 133   {
 134     return do_get_option(impl,
 135         &reactive_serial_port_service::load_option<GettableSerialPortOption>,
 136         &option, ec);
 137   }
 138
 139   // Send a break sequence to the serial port.
 140   boost::system::error_code send_break(implementation_type& impl,
 141       boost::system::error_code& ec)
 142   {
 143     int result = ::tcsendbreak(descriptor_service_.native_handle(impl), 0);
 144     descriptor_ops::get_last_error(ec, result < 0);
 145     return ec;
 146   }
 147
 148   // Write the given data. Returns the number of bytes sent.
 149   template <typename ConstBufferSequence>
 150   size_t write_some(implementation_type& impl,
 151       const ConstBufferSequence& buffers, boost::system::error_code& ec)
 152   {
 153     return descriptor_service_.write_some(impl, buffers, ec);
 154   }
 155
 156   // Start an asynchronous write. The data being written must be valid for the
 157   // lifetime of the asynchronous operation.
 158   template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
 159   void async_write_some(implementation_type& impl,
 160       const ConstBufferSequence& buffers,
 161       Handler& handler, const IoExecutor& io_ex)
 162   {
 163     descriptor_service_.async_write_some(impl, buffers, handler, io_ex);
 164   }
 165
 166   // Read some data. Returns the number of bytes received.
 167   template <typename MutableBufferSequence>
 168   size_t read_some(implementation_type& impl,
 169       const MutableBufferSequence& buffers, boost::system::error_code& ec)
 170   {
 171     return descriptor_service_.read_some(impl, buffers, ec);
 172   }
 173
 174   // Start an asynchronous read. The buffer for the data being received must be
 175   // valid for the lifetime of the asynchronous operation.
 176   template <typename MutableBufferSequence,
 177       typename Handler, typename IoExecutor>
 178   void async_read_some(implementation_type& impl,
 179       const MutableBufferSequence& buffers,
 180       Handler& handler, const IoExecutor& io_ex)
 181   {
 182     descriptor_service_.async_read_some(impl, buffers, handler, io_ex);
 183   }
 184
 185 private:
 186   // Function pointer type for storing a serial port option.
 187   typedef boost::system::error_code (*store_function_type)(
 188       const void*, termios&, boost::system::error_code&);
 189
 190   // Helper function template to store a serial port option.
 191   template <typename SettableSerialPortOption>
 192   static boost::system::error_code store_option(const void* option,
 193       termios& storage, boost::system::error_code& ec)
 194   {
 195     static_cast<const SettableSerialPortOption*>(option)->store(storage, ec);
 196     return ec;
 197   }
 198
 199   // Helper function to set a serial port option.
 200   BOOST_ASIO_DECL boost::system::error_code do_set_option(
 201       implementation_type& impl, store_function_type store,
 202       const void* option, boost::system::error_code& ec);
 203
 204   // Function pointer type for loading a serial port option.
 205   typedef boost::system::error_code (*load_function_type)(
 206       void*, const termios&, boost::system::error_code&);
 207
 208   // Helper function template to load a serial port option.
 209   template <typename GettableSerialPortOption>
 210   static boost::system::error_code load_option(void* option,
 211       const termios& storage, boost::system::error_code& ec)
 212   {
 213     static_cast<GettableSerialPortOption*>(option)->load(storage, ec);
 214     return ec;
 215   }
 216
 217   // Helper function to get a serial port option.
 218   BOOST_ASIO_DECL boost::system::error_code do_get_option(
 219       const implementation_type& impl, load_function_type load,
 220       void* option, boost::system::error_code& ec) const;
 221
 222   // The implementation used for initiating asynchronous operations.
 223   reactive_descriptor_service descriptor_service_;
 224 };
 225
 226 } // namespace detail
 227 } // namespace asio
 228 } // namespace boost
 229
 230 #include <boost/asio/detail/pop_options.hpp>
 231
 232 #if defined(BOOST_ASIO_HEADER_ONLY)
 233 # include <boost/asio/detail/impl/reactive_serial_port_service.ipp>
 234 #endif // defined(BOOST_ASIO_HEADER_ONLY)
 235
 236 #endif // !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
 237 #endif // defined(BOOST_ASIO_HAS_SERIAL_PORT)
 238
 239 #endif // BOOST_ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP