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+//
+// detail/reactive_serial_port_service.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 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 ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP
+#define ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if defined(ASIO_HAS_SERIAL_PORT)
+#if !defined(ASIO_WINDOWS) && !defined(__CYGWIN__)
+
+#include <string>
+#include "asio/error.hpp"
+#include "asio/io_context.hpp"
+#include "asio/serial_port_base.hpp"
+#include "asio/detail/descriptor_ops.hpp"
+#include "asio/detail/reactive_descriptor_service.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+// Extend reactive_descriptor_service to provide serial port support.
+class reactive_serial_port_service :
+  public service_base<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;
+
+  ASIO_DECL reactive_serial_port_service(
+      asio::io_context& io_context);
+
+  // Destroy all user-defined handler objects owned by the service.
+  ASIO_DECL void shutdown();
+
+  // 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.
+  ASIO_DECL asio::error_code open(implementation_type& impl,
+      const std::string& device, asio::error_code& ec);
+
+  // Assign a native descriptor to a serial port implementation.
+  asio::error_code assign(implementation_type& impl,
+      const native_handle_type& native_descriptor,
+      asio::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.
+  asio::error_code close(implementation_type& impl,
+      asio::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.
+  asio::error_code cancel(implementation_type& impl,
+      asio::error_code& ec)
+  {
+    return descriptor_service_.cancel(impl, ec);
+  }
+
+  // Set an option on the serial port.
+  template <typename SettableSerialPortOption>
+  asio::error_code set_option(implementation_type& impl,
+      const SettableSerialPortOption& option, asio::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>
+  asio::error_code get_option(const implementation_type& impl,
+      GettableSerialPortOption& option, asio::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.
+  asio::error_code send_break(implementation_type& impl,
+      asio::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, asio::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, asio::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 asio::error_code (*store_function_type)(
+      const void*, termios&, asio::error_code&);
+
+  // Helper function template to store a serial port option.
+  template <typename SettableSerialPortOption>
+  static asio::error_code store_option(const void* option,
+      termios& storage, asio::error_code& ec)
+  {
+    static_cast<const SettableSerialPortOption*>(option)->store(storage, ec);
+    return ec;
+  }
+
+  // Helper function to set a serial port option.
+  ASIO_DECL asio::error_code do_set_option(
+      implementation_type& impl, store_function_type store,
+      const void* option, asio::error_code& ec);
+
+  // Function pointer type for loading a serial port option.
+  typedef asio::error_code (*load_function_type)(
+      void*, const termios&, asio::error_code&);
+
+  // Helper function template to load a serial port option.
+  template <typename GettableSerialPortOption>
+  static asio::error_code load_option(void* option,
+      const termios& storage, asio::error_code& ec)
+  {
+    static_cast<GettableSerialPortOption*>(option)->load(storage, ec);
+    return ec;
+  }
+
+  // Helper function to get a serial port option.
+  ASIO_DECL asio::error_code do_get_option(
+      const implementation_type& impl, load_function_type load,
+      void* option, asio::error_code& ec) const;
+
+  // The implementation used for initiating asynchronous operations.
+  reactive_descriptor_service descriptor_service_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#if defined(ASIO_HEADER_ONLY)
+# include "asio/detail/impl/reactive_serial_port_service.ipp"
+#endif // defined(ASIO_HEADER_ONLY)
+
+#endif // !defined(ASIO_WINDOWS) && !defined(__CYGWIN__)
+#endif // defined(ASIO_HAS_SERIAL_PORT)
+
+#endif // ASIO_DETAIL_REACTIVE_SERIAL_PORT_SERVICE_HPP