1001 lines
33 KiB
C++
1001 lines
33 KiB
C++
//
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// basic_serial_port.hpp
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// ~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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// Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_BASIC_SERIAL_PORT_HPP
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#define ASIO_BASIC_SERIAL_PORT_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if defined(ASIO_HAS_SERIAL_PORT) \
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|| defined(GENERATING_DOCUMENTATION)
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#include <string>
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#include "asio/any_io_executor.hpp"
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#include "asio/async_result.hpp"
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#include "asio/detail/handler_type_requirements.hpp"
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#include "asio/detail/io_object_impl.hpp"
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#include "asio/detail/non_const_lvalue.hpp"
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#include "asio/detail/throw_error.hpp"
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#include "asio/detail/type_traits.hpp"
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#include "asio/error.hpp"
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#include "asio/execution_context.hpp"
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#include "asio/serial_port_base.hpp"
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#if defined(ASIO_HAS_IOCP)
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# include "asio/detail/win_iocp_serial_port_service.hpp"
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#else
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# include "asio/detail/posix_serial_port_service.hpp"
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#endif
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#if defined(ASIO_HAS_MOVE)
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# include <utility>
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#endif // defined(ASIO_HAS_MOVE)
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#include "asio/detail/push_options.hpp"
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namespace asio {
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/// Provides serial port functionality.
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/**
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* The basic_serial_port class provides a wrapper over serial port
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* functionality.
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*
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* @par Thread Safety
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* @e Distinct @e objects: Safe.@n
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* @e Shared @e objects: Unsafe.
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*/
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template <typename Executor = any_io_executor>
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class basic_serial_port
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: public serial_port_base
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{
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private:
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class initiate_async_write_some;
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class initiate_async_read_some;
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public:
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/// The type of the executor associated with the object.
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typedef Executor executor_type;
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/// Rebinds the serial port type to another executor.
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template <typename Executor1>
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struct rebind_executor
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{
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/// The serial port type when rebound to the specified executor.
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typedef basic_serial_port<Executor1> other;
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};
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/// The native representation of a serial port.
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined native_handle_type;
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#elif defined(ASIO_HAS_IOCP)
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typedef detail::win_iocp_serial_port_service::native_handle_type
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native_handle_type;
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#else
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typedef detail::posix_serial_port_service::native_handle_type
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native_handle_type;
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#endif
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/// A basic_basic_serial_port is always the lowest layer.
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typedef basic_serial_port lowest_layer_type;
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/// Construct a basic_serial_port without opening it.
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/**
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* This constructor creates a serial port without opening it.
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*
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* @param ex The I/O executor that the serial port will use, by default, to
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* dispatch handlers for any asynchronous operations performed on the
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* serial port.
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*/
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explicit basic_serial_port(const executor_type& ex)
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: impl_(0, ex)
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{
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}
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/// Construct a basic_serial_port without opening it.
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/**
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* This constructor creates a serial port without opening it.
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*
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* @param context An execution context which provides the I/O executor that
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* the serial port will use, by default, to dispatch handlers for any
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* asynchronous operations performed on the serial port.
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*/
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template <typename ExecutionContext>
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explicit basic_serial_port(ExecutionContext& context,
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typename constraint<
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is_convertible<ExecutionContext&, execution_context&>::value,
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defaulted_constraint
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>::type = defaulted_constraint())
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: impl_(0, 0, context)
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{
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}
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/// Construct and open a basic_serial_port.
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/**
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* This constructor creates and opens a serial port for the specified device
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* name.
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*
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* @param ex The I/O executor that the serial port will use, by default, to
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* dispatch handlers for any asynchronous operations performed on the
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* serial port.
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*
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* @param device The platform-specific device name for this serial
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* port.
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*/
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basic_serial_port(const executor_type& ex, const char* device)
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: impl_(0, ex)
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{
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asio::error_code ec;
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impl_.get_service().open(impl_.get_implementation(), device, ec);
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asio::detail::throw_error(ec, "open");
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}
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/// Construct and open a basic_serial_port.
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/**
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* This constructor creates and opens a serial port for the specified device
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* name.
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*
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* @param context An execution context which provides the I/O executor that
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* the serial port will use, by default, to dispatch handlers for any
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* asynchronous operations performed on the serial port.
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*
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* @param device The platform-specific device name for this serial
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* port.
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*/
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template <typename ExecutionContext>
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basic_serial_port(ExecutionContext& context, const char* device,
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typename constraint<
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is_convertible<ExecutionContext&, execution_context&>::value
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>::type = 0)
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: impl_(0, 0, context)
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{
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asio::error_code ec;
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impl_.get_service().open(impl_.get_implementation(), device, ec);
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asio::detail::throw_error(ec, "open");
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}
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/// Construct and open a basic_serial_port.
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/**
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* This constructor creates and opens a serial port for the specified device
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* name.
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*
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* @param ex The I/O executor that the serial port will use, by default, to
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* dispatch handlers for any asynchronous operations performed on the
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* serial port.
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*
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* @param device The platform-specific device name for this serial
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* port.
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*/
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basic_serial_port(const executor_type& ex, const std::string& device)
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: impl_(0, ex)
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{
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asio::error_code ec;
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impl_.get_service().open(impl_.get_implementation(), device, ec);
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asio::detail::throw_error(ec, "open");
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}
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/// Construct and open a basic_serial_port.
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/**
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* This constructor creates and opens a serial port for the specified device
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* name.
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*
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* @param context An execution context which provides the I/O executor that
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* the serial port will use, by default, to dispatch handlers for any
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* asynchronous operations performed on the serial port.
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*
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* @param device The platform-specific device name for this serial
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* port.
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*/
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template <typename ExecutionContext>
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basic_serial_port(ExecutionContext& context, const std::string& device,
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typename constraint<
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is_convertible<ExecutionContext&, execution_context&>::value
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>::type = 0)
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: impl_(0, 0, context)
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{
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asio::error_code ec;
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impl_.get_service().open(impl_.get_implementation(), device, ec);
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asio::detail::throw_error(ec, "open");
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}
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/// Construct a basic_serial_port on an existing native serial port.
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/**
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* This constructor creates a serial port object to hold an existing native
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* serial port.
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*
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* @param ex The I/O executor that the serial port will use, by default, to
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* dispatch handlers for any asynchronous operations performed on the
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* serial port.
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*
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* @param native_serial_port A native serial port.
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*
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* @throws asio::system_error Thrown on failure.
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*/
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basic_serial_port(const executor_type& ex,
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const native_handle_type& native_serial_port)
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: impl_(0, ex)
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{
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asio::error_code ec;
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impl_.get_service().assign(impl_.get_implementation(),
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native_serial_port, ec);
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asio::detail::throw_error(ec, "assign");
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}
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/// Construct a basic_serial_port on an existing native serial port.
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/**
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* This constructor creates a serial port object to hold an existing native
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* serial port.
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*
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* @param context An execution context which provides the I/O executor that
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* the serial port will use, by default, to dispatch handlers for any
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* asynchronous operations performed on the serial port.
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*
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* @param native_serial_port A native serial port.
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*
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* @throws asio::system_error Thrown on failure.
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*/
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template <typename ExecutionContext>
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basic_serial_port(ExecutionContext& context,
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const native_handle_type& native_serial_port,
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typename constraint<
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is_convertible<ExecutionContext&, execution_context&>::value
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>::type = 0)
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: impl_(0, 0, context)
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{
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asio::error_code ec;
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impl_.get_service().assign(impl_.get_implementation(),
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native_serial_port, ec);
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asio::detail::throw_error(ec, "assign");
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}
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#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
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/// Move-construct a basic_serial_port from another.
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/**
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* This constructor moves a serial port from one object to another.
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*
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* @param other The other basic_serial_port object from which the move will
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* occur.
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*
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* @note Following the move, the moved-from object is in the same state as if
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* constructed using the @c basic_serial_port(const executor_type&)
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* constructor.
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*/
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basic_serial_port(basic_serial_port&& other)
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: impl_(std::move(other.impl_))
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{
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}
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/// Move-assign a basic_serial_port from another.
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/**
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* This assignment operator moves a serial port from one object to another.
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*
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* @param other The other basic_serial_port object from which the move will
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* occur.
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*
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* @note Following the move, the moved-from object is in the same state as if
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* constructed using the @c basic_serial_port(const executor_type&)
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* constructor.
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*/
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basic_serial_port& operator=(basic_serial_port&& other)
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{
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impl_ = std::move(other.impl_);
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return *this;
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}
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// All serial ports have access to each other's implementations.
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template <typename Executor1>
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friend class basic_serial_port;
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/// Move-construct a basic_serial_port from a serial port of another executor
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/// type.
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/**
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* This constructor moves a serial port from one object to another.
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*
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* @param other The other basic_serial_port object from which the move will
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* occur.
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*
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* @note Following the move, the moved-from object is in the same state as if
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* constructed using the @c basic_serial_port(const executor_type&)
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* constructor.
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*/
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template <typename Executor1>
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basic_serial_port(basic_serial_port<Executor1>&& other,
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typename constraint<
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is_convertible<Executor1, Executor>::value,
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defaulted_constraint
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>::type = defaulted_constraint())
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: impl_(std::move(other.impl_))
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{
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}
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/// Move-assign a basic_serial_port from a serial port of another executor
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/// type.
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/**
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* This assignment operator moves a serial port from one object to another.
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*
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* @param other The other basic_serial_port object from which the move will
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* occur.
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*
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* @note Following the move, the moved-from object is in the same state as if
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* constructed using the @c basic_serial_port(const executor_type&)
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* constructor.
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*/
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template <typename Executor1>
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typename constraint<
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is_convertible<Executor1, Executor>::value,
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basic_serial_port&
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>::type operator=(basic_serial_port<Executor1>&& other)
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{
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basic_serial_port tmp(std::move(other));
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impl_ = std::move(tmp.impl_);
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return *this;
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}
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#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
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/// Destroys the serial port.
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/**
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* This function destroys the serial port, cancelling any outstanding
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* asynchronous wait operations associated with the serial port as if by
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* calling @c cancel.
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*/
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~basic_serial_port()
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{
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}
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/// Get the executor associated with the object.
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const executor_type& get_executor() ASIO_NOEXCEPT
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{
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return impl_.get_executor();
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}
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/// Get a reference to the lowest layer.
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/**
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* This function returns a reference to the lowest layer in a stack of
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* layers. Since a basic_serial_port cannot contain any further layers, it
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* simply returns a reference to itself.
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*
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* @return A reference to the lowest layer in the stack of layers. Ownership
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* is not transferred to the caller.
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*/
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lowest_layer_type& lowest_layer()
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{
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return *this;
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}
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/// Get a const reference to the lowest layer.
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/**
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* This function returns a const reference to the lowest layer in a stack of
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* layers. Since a basic_serial_port cannot contain any further layers, it
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* simply returns a reference to itself.
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*
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* @return A const reference to the lowest layer in the stack of layers.
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* Ownership is not transferred to the caller.
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*/
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const lowest_layer_type& lowest_layer() const
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{
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return *this;
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}
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/// Open the serial port using the specified device name.
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/**
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* This function opens the serial port for the specified device name.
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*
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* @param device The platform-specific device name.
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*
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* @throws asio::system_error Thrown on failure.
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*/
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void open(const std::string& device)
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{
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asio::error_code ec;
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impl_.get_service().open(impl_.get_implementation(), device, ec);
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asio::detail::throw_error(ec, "open");
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}
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/// Open the serial port using the specified device name.
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/**
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* This function opens the serial port using the given platform-specific
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* device name.
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*
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* @param device The platform-specific device name.
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*
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* @param ec Set the indicate what error occurred, if any.
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*/
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ASIO_SYNC_OP_VOID open(const std::string& device,
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asio::error_code& ec)
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{
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impl_.get_service().open(impl_.get_implementation(), device, ec);
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ASIO_SYNC_OP_VOID_RETURN(ec);
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}
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/// Assign an existing native serial port to the serial port.
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/*
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* This function opens the serial port to hold an existing native serial port.
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*
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* @param native_serial_port A native serial port.
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*
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* @throws asio::system_error Thrown on failure.
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*/
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void assign(const native_handle_type& native_serial_port)
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{
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asio::error_code ec;
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impl_.get_service().assign(impl_.get_implementation(),
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native_serial_port, ec);
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asio::detail::throw_error(ec, "assign");
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}
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/// Assign an existing native serial port to the serial port.
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/*
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* This function opens the serial port to hold an existing native serial port.
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*
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* @param native_serial_port A native serial port.
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*
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* @param ec Set to indicate what error occurred, if any.
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*/
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ASIO_SYNC_OP_VOID assign(const native_handle_type& native_serial_port,
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asio::error_code& ec)
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{
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impl_.get_service().assign(impl_.get_implementation(),
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native_serial_port, ec);
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ASIO_SYNC_OP_VOID_RETURN(ec);
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}
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/// Determine whether the serial port is open.
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bool is_open() const
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{
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return impl_.get_service().is_open(impl_.get_implementation());
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}
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/// Close the serial port.
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/**
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* This function is used to close the serial port. Any asynchronous read or
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* write operations will be cancelled immediately, and will complete with the
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* asio::error::operation_aborted error.
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*
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* @throws asio::system_error Thrown on failure.
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*/
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void close()
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{
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asio::error_code ec;
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impl_.get_service().close(impl_.get_implementation(), ec);
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asio::detail::throw_error(ec, "close");
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}
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/// Close the serial port.
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/**
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* This function is used to close the serial port. Any asynchronous read or
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* write operations will be cancelled immediately, and will complete with the
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* asio::error::operation_aborted error.
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*
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* @param ec Set to indicate what error occurred, if any.
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*/
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ASIO_SYNC_OP_VOID close(asio::error_code& ec)
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{
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impl_.get_service().close(impl_.get_implementation(), ec);
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ASIO_SYNC_OP_VOID_RETURN(ec);
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}
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/// Get the native serial port representation.
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/**
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* This function may be used to obtain the underlying representation of the
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* serial port. This is intended to allow access to native serial port
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* functionality that is not otherwise provided.
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*/
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native_handle_type native_handle()
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{
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return impl_.get_service().native_handle(impl_.get_implementation());
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}
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/// Cancel all asynchronous operations associated with the serial port.
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/**
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* This function causes all outstanding asynchronous read or write operations
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* to finish immediately, and the handlers for cancelled operations will be
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* passed the asio::error::operation_aborted error.
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*
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* @throws asio::system_error Thrown on failure.
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*/
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void cancel()
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{
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asio::error_code ec;
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impl_.get_service().cancel(impl_.get_implementation(), ec);
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asio::detail::throw_error(ec, "cancel");
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}
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/// Cancel all asynchronous operations associated with the serial port.
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/**
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* This function causes all outstanding asynchronous read or write operations
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* to finish immediately, and the handlers for cancelled operations will be
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* passed the asio::error::operation_aborted error.
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*
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* @param ec Set to indicate what error occurred, if any.
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*/
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ASIO_SYNC_OP_VOID cancel(asio::error_code& ec)
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{
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impl_.get_service().cancel(impl_.get_implementation(), ec);
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ASIO_SYNC_OP_VOID_RETURN(ec);
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}
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/// Send a break sequence to the serial port.
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/**
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* This function causes a break sequence of platform-specific duration to be
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|
* sent out the serial port.
|
|
*
|
|
* @throws asio::system_error Thrown on failure.
|
|
*/
|
|
void send_break()
|
|
{
|
|
asio::error_code ec;
|
|
impl_.get_service().send_break(impl_.get_implementation(), ec);
|
|
asio::detail::throw_error(ec, "send_break");
|
|
}
|
|
|
|
/// Send a break sequence to the serial port.
|
|
/**
|
|
* This function causes a break sequence of platform-specific duration to be
|
|
* sent out the serial port.
|
|
*
|
|
* @param ec Set to indicate what error occurred, if any.
|
|
*/
|
|
ASIO_SYNC_OP_VOID send_break(asio::error_code& ec)
|
|
{
|
|
impl_.get_service().send_break(impl_.get_implementation(), ec);
|
|
ASIO_SYNC_OP_VOID_RETURN(ec);
|
|
}
|
|
|
|
/// Set an option on the serial port.
|
|
/**
|
|
* This function is used to set an option on the serial port.
|
|
*
|
|
* @param option The option value to be set on the serial port.
|
|
*
|
|
* @throws asio::system_error Thrown on failure.
|
|
*
|
|
* @sa SettableSerialPortOption @n
|
|
* asio::serial_port_base::baud_rate @n
|
|
* asio::serial_port_base::flow_control @n
|
|
* asio::serial_port_base::parity @n
|
|
* asio::serial_port_base::stop_bits @n
|
|
* asio::serial_port_base::character_size
|
|
*/
|
|
template <typename SettableSerialPortOption>
|
|
void set_option(const SettableSerialPortOption& option)
|
|
{
|
|
asio::error_code ec;
|
|
impl_.get_service().set_option(impl_.get_implementation(), option, ec);
|
|
asio::detail::throw_error(ec, "set_option");
|
|
}
|
|
|
|
/// Set an option on the serial port.
|
|
/**
|
|
* This function is used to set an option on the serial port.
|
|
*
|
|
* @param option The option value to be set on the serial port.
|
|
*
|
|
* @param ec Set to indicate what error occurred, if any.
|
|
*
|
|
* @sa SettableSerialPortOption @n
|
|
* asio::serial_port_base::baud_rate @n
|
|
* asio::serial_port_base::flow_control @n
|
|
* asio::serial_port_base::parity @n
|
|
* asio::serial_port_base::stop_bits @n
|
|
* asio::serial_port_base::character_size
|
|
*/
|
|
template <typename SettableSerialPortOption>
|
|
ASIO_SYNC_OP_VOID set_option(const SettableSerialPortOption& option,
|
|
asio::error_code& ec)
|
|
{
|
|
impl_.get_service().set_option(impl_.get_implementation(), option, ec);
|
|
ASIO_SYNC_OP_VOID_RETURN(ec);
|
|
}
|
|
|
|
/// Get an option from the serial port.
|
|
/**
|
|
* This function is used to get the current value of an option on the serial
|
|
* port.
|
|
*
|
|
* @param option The option value to be obtained from the serial port.
|
|
*
|
|
* @throws asio::system_error Thrown on failure.
|
|
*
|
|
* @sa GettableSerialPortOption @n
|
|
* asio::serial_port_base::baud_rate @n
|
|
* asio::serial_port_base::flow_control @n
|
|
* asio::serial_port_base::parity @n
|
|
* asio::serial_port_base::stop_bits @n
|
|
* asio::serial_port_base::character_size
|
|
*/
|
|
template <typename GettableSerialPortOption>
|
|
void get_option(GettableSerialPortOption& option) const
|
|
{
|
|
asio::error_code ec;
|
|
impl_.get_service().get_option(impl_.get_implementation(), option, ec);
|
|
asio::detail::throw_error(ec, "get_option");
|
|
}
|
|
|
|
/// Get an option from the serial port.
|
|
/**
|
|
* This function is used to get the current value of an option on the serial
|
|
* port.
|
|
*
|
|
* @param option The option value to be obtained from the serial port.
|
|
*
|
|
* @param ec Set to indicate what error occurred, if any.
|
|
*
|
|
* @sa GettableSerialPortOption @n
|
|
* asio::serial_port_base::baud_rate @n
|
|
* asio::serial_port_base::flow_control @n
|
|
* asio::serial_port_base::parity @n
|
|
* asio::serial_port_base::stop_bits @n
|
|
* asio::serial_port_base::character_size
|
|
*/
|
|
template <typename GettableSerialPortOption>
|
|
ASIO_SYNC_OP_VOID get_option(GettableSerialPortOption& option,
|
|
asio::error_code& ec) const
|
|
{
|
|
impl_.get_service().get_option(impl_.get_implementation(), option, ec);
|
|
ASIO_SYNC_OP_VOID_RETURN(ec);
|
|
}
|
|
|
|
/// Write some data to the serial port.
|
|
/**
|
|
* This function is used to write data to the serial port. The function call
|
|
* will block until one or more bytes of the data has been written
|
|
* successfully, or until an error occurs.
|
|
*
|
|
* @param buffers One or more data buffers to be written to the serial port.
|
|
*
|
|
* @returns The number of bytes written.
|
|
*
|
|
* @throws asio::system_error Thrown on failure. An error code of
|
|
* asio::error::eof indicates that the connection was closed by the
|
|
* peer.
|
|
*
|
|
* @note The write_some operation may not transmit all of the data to the
|
|
* peer. Consider using the @ref write function if you need to ensure that
|
|
* all data is written before the blocking operation completes.
|
|
*
|
|
* @par Example
|
|
* To write a single data buffer use the @ref buffer function as follows:
|
|
* @code
|
|
* basic_serial_port.write_some(asio::buffer(data, size));
|
|
* @endcode
|
|
* See the @ref buffer documentation for information on writing multiple
|
|
* buffers in one go, and how to use it with arrays, boost::array or
|
|
* std::vector.
|
|
*/
|
|
template <typename ConstBufferSequence>
|
|
std::size_t write_some(const ConstBufferSequence& buffers)
|
|
{
|
|
asio::error_code ec;
|
|
std::size_t s = impl_.get_service().write_some(
|
|
impl_.get_implementation(), buffers, ec);
|
|
asio::detail::throw_error(ec, "write_some");
|
|
return s;
|
|
}
|
|
|
|
/// Write some data to the serial port.
|
|
/**
|
|
* This function is used to write data to the serial port. The function call
|
|
* will block until one or more bytes of the data has been written
|
|
* successfully, or until an error occurs.
|
|
*
|
|
* @param buffers One or more data buffers to be written to the serial port.
|
|
*
|
|
* @param ec Set to indicate what error occurred, if any.
|
|
*
|
|
* @returns The number of bytes written. Returns 0 if an error occurred.
|
|
*
|
|
* @note The write_some operation may not transmit all of the data to the
|
|
* peer. Consider using the @ref write function if you need to ensure that
|
|
* all data is written before the blocking operation completes.
|
|
*/
|
|
template <typename ConstBufferSequence>
|
|
std::size_t write_some(const ConstBufferSequence& buffers,
|
|
asio::error_code& ec)
|
|
{
|
|
return impl_.get_service().write_some(
|
|
impl_.get_implementation(), buffers, ec);
|
|
}
|
|
|
|
/// Start an asynchronous write.
|
|
/**
|
|
* This function is used to asynchronously write data to the serial port.
|
|
* It is an initiating function for an @ref asynchronous_operation, and always
|
|
* returns immediately.
|
|
*
|
|
* @param buffers One or more data buffers to be written to the serial port.
|
|
* Although the buffers object may be copied as necessary, ownership of the
|
|
* underlying memory blocks is retained by the caller, which must guarantee
|
|
* that they remain valid until the completion handler is called.
|
|
*
|
|
* @param token The @ref completion_token that will be used to produce a
|
|
* completion handler, which will be called when the write completes.
|
|
* Potential completion tokens include @ref use_future, @ref use_awaitable,
|
|
* @ref yield_context, or a function object with the correct completion
|
|
* signature. The function signature of the completion handler must be:
|
|
* @code void handler(
|
|
* const asio::error_code& error, // Result of operation.
|
|
* std::size_t bytes_transferred // Number of bytes written.
|
|
* ); @endcode
|
|
* Regardless of whether the asynchronous operation completes immediately or
|
|
* not, the completion handler will not be invoked from within this function.
|
|
* On immediate completion, invocation of the handler will be performed in a
|
|
* manner equivalent to using asio::post().
|
|
*
|
|
* @par Completion Signature
|
|
* @code void(asio::error_code, std::size_t) @endcode
|
|
*
|
|
* @note The write operation may not transmit all of the data to the peer.
|
|
* Consider using the @ref async_write function if you need to ensure that all
|
|
* data is written before the asynchronous operation completes.
|
|
*
|
|
* @par Example
|
|
* To write a single data buffer use the @ref buffer function as follows:
|
|
* @code
|
|
* basic_serial_port.async_write_some(
|
|
* asio::buffer(data, size), handler);
|
|
* @endcode
|
|
* See the @ref buffer documentation for information on writing multiple
|
|
* buffers in one go, and how to use it with arrays, boost::array or
|
|
* std::vector.
|
|
*
|
|
* @par Per-Operation Cancellation
|
|
* On POSIX or Windows operating systems, this asynchronous operation supports
|
|
* cancellation for the following asio::cancellation_type values:
|
|
*
|
|
* @li @c cancellation_type::terminal
|
|
*
|
|
* @li @c cancellation_type::partial
|
|
*
|
|
* @li @c cancellation_type::total
|
|
*/
|
|
template <typename ConstBufferSequence,
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
|
std::size_t)) WriteToken
|
|
ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(WriteToken,
|
|
void (asio::error_code, std::size_t))
|
|
async_write_some(const ConstBufferSequence& buffers,
|
|
ASIO_MOVE_ARG(WriteToken) token
|
|
ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
|
async_initiate<WriteToken,
|
|
void (asio::error_code, std::size_t)>(
|
|
declval<initiate_async_write_some>(), token, buffers)))
|
|
{
|
|
return async_initiate<WriteToken,
|
|
void (asio::error_code, std::size_t)>(
|
|
initiate_async_write_some(this), token, buffers);
|
|
}
|
|
|
|
/// Read some data from the serial port.
|
|
/**
|
|
* This function is used to read data from the serial port. The function
|
|
* call will block until one or more bytes of data has been read successfully,
|
|
* or until an error occurs.
|
|
*
|
|
* @param buffers One or more buffers into which the data will be read.
|
|
*
|
|
* @returns The number of bytes read.
|
|
*
|
|
* @throws asio::system_error Thrown on failure. An error code of
|
|
* asio::error::eof indicates that the connection was closed by the
|
|
* peer.
|
|
*
|
|
* @note The read_some operation may not read all of the requested number of
|
|
* bytes. Consider using the @ref read function if you need to ensure that
|
|
* the requested amount of data is read before the blocking operation
|
|
* completes.
|
|
*
|
|
* @par Example
|
|
* To read into a single data buffer use the @ref buffer function as follows:
|
|
* @code
|
|
* basic_serial_port.read_some(asio::buffer(data, size));
|
|
* @endcode
|
|
* See the @ref buffer documentation for information on reading into multiple
|
|
* buffers in one go, and how to use it with arrays, boost::array or
|
|
* std::vector.
|
|
*/
|
|
template <typename MutableBufferSequence>
|
|
std::size_t read_some(const MutableBufferSequence& buffers)
|
|
{
|
|
asio::error_code ec;
|
|
std::size_t s = impl_.get_service().read_some(
|
|
impl_.get_implementation(), buffers, ec);
|
|
asio::detail::throw_error(ec, "read_some");
|
|
return s;
|
|
}
|
|
|
|
/// Read some data from the serial port.
|
|
/**
|
|
* This function is used to read data from the serial port. The function
|
|
* call will block until one or more bytes of data has been read successfully,
|
|
* or until an error occurs.
|
|
*
|
|
* @param buffers One or more buffers into which the data will be read.
|
|
*
|
|
* @param ec Set to indicate what error occurred, if any.
|
|
*
|
|
* @returns The number of bytes read. Returns 0 if an error occurred.
|
|
*
|
|
* @note The read_some operation may not read all of the requested number of
|
|
* bytes. Consider using the @ref read function if you need to ensure that
|
|
* the requested amount of data is read before the blocking operation
|
|
* completes.
|
|
*/
|
|
template <typename MutableBufferSequence>
|
|
std::size_t read_some(const MutableBufferSequence& buffers,
|
|
asio::error_code& ec)
|
|
{
|
|
return impl_.get_service().read_some(
|
|
impl_.get_implementation(), buffers, ec);
|
|
}
|
|
|
|
/// Start an asynchronous read.
|
|
/**
|
|
* This function is used to asynchronously read data from the serial port.
|
|
* It is an initiating function for an @ref asynchronous_operation, and always
|
|
* returns immediately.
|
|
*
|
|
* @param buffers One or more buffers into which the data will be read.
|
|
* Although the buffers object may be copied as necessary, ownership of the
|
|
* underlying memory blocks is retained by the caller, which must guarantee
|
|
* that they remain valid until the completion handler is called.
|
|
*
|
|
* @param token The @ref completion_token that will be used to produce a
|
|
* completion handler, which will be called when the read completes.
|
|
* Potential completion tokens include @ref use_future, @ref use_awaitable,
|
|
* @ref yield_context, or a function object with the correct completion
|
|
* signature. The function signature of the completion handler must be:
|
|
* @code void handler(
|
|
* const asio::error_code& error, // Result of operation.
|
|
* std::size_t bytes_transferred // Number of bytes read.
|
|
* ); @endcode
|
|
* Regardless of whether the asynchronous operation completes immediately or
|
|
* not, the completion handler will not be invoked from within this function.
|
|
* On immediate completion, invocation of the handler will be performed in a
|
|
* manner equivalent to using asio::post().
|
|
*
|
|
* @par Completion Signature
|
|
* @code void(asio::error_code, std::size_t) @endcode
|
|
*
|
|
* @note The read operation may not read all of the requested number of bytes.
|
|
* Consider using the @ref async_read function if you need to ensure that the
|
|
* requested amount of data is read before the asynchronous operation
|
|
* completes.
|
|
*
|
|
* @par Example
|
|
* To read into a single data buffer use the @ref buffer function as follows:
|
|
* @code
|
|
* basic_serial_port.async_read_some(
|
|
* asio::buffer(data, size), handler);
|
|
* @endcode
|
|
* See the @ref buffer documentation for information on reading into multiple
|
|
* buffers in one go, and how to use it with arrays, boost::array or
|
|
* std::vector.
|
|
*
|
|
* @par Per-Operation Cancellation
|
|
* On POSIX or Windows operating systems, this asynchronous operation supports
|
|
* cancellation for the following asio::cancellation_type values:
|
|
*
|
|
* @li @c cancellation_type::terminal
|
|
*
|
|
* @li @c cancellation_type::partial
|
|
*
|
|
* @li @c cancellation_type::total
|
|
*/
|
|
template <typename MutableBufferSequence,
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
|
std::size_t)) ReadToken
|
|
ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
|
void (asio::error_code, std::size_t))
|
|
async_read_some(const MutableBufferSequence& buffers,
|
|
ASIO_MOVE_ARG(ReadToken) token
|
|
ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
|
async_initiate<ReadToken,
|
|
void (asio::error_code, std::size_t)>(
|
|
declval<initiate_async_read_some>(), token, buffers)))
|
|
{
|
|
return async_initiate<ReadToken,
|
|
void (asio::error_code, std::size_t)>(
|
|
initiate_async_read_some(this), token, buffers);
|
|
}
|
|
|
|
private:
|
|
// Disallow copying and assignment.
|
|
basic_serial_port(const basic_serial_port&) ASIO_DELETED;
|
|
basic_serial_port& operator=(const basic_serial_port&) ASIO_DELETED;
|
|
|
|
class initiate_async_write_some
|
|
{
|
|
public:
|
|
typedef Executor executor_type;
|
|
|
|
explicit initiate_async_write_some(basic_serial_port* self)
|
|
: self_(self)
|
|
{
|
|
}
|
|
|
|
const executor_type& get_executor() const ASIO_NOEXCEPT
|
|
{
|
|
return self_->get_executor();
|
|
}
|
|
|
|
template <typename WriteHandler, typename ConstBufferSequence>
|
|
void operator()(ASIO_MOVE_ARG(WriteHandler) handler,
|
|
const ConstBufferSequence& buffers) const
|
|
{
|
|
// If you get an error on the following line it means that your handler
|
|
// does not meet the documented type requirements for a WriteHandler.
|
|
ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
|
|
|
|
detail::non_const_lvalue<WriteHandler> handler2(handler);
|
|
self_->impl_.get_service().async_write_some(
|
|
self_->impl_.get_implementation(), buffers,
|
|
handler2.value, self_->impl_.get_executor());
|
|
}
|
|
|
|
private:
|
|
basic_serial_port* self_;
|
|
};
|
|
|
|
class initiate_async_read_some
|
|
{
|
|
public:
|
|
typedef Executor executor_type;
|
|
|
|
explicit initiate_async_read_some(basic_serial_port* self)
|
|
: self_(self)
|
|
{
|
|
}
|
|
|
|
const executor_type& get_executor() const ASIO_NOEXCEPT
|
|
{
|
|
return self_->get_executor();
|
|
}
|
|
|
|
template <typename ReadHandler, typename MutableBufferSequence>
|
|
void operator()(ASIO_MOVE_ARG(ReadHandler) handler,
|
|
const MutableBufferSequence& buffers) const
|
|
{
|
|
// If you get an error on the following line it means that your handler
|
|
// does not meet the documented type requirements for a ReadHandler.
|
|
ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
|
|
|
detail::non_const_lvalue<ReadHandler> handler2(handler);
|
|
self_->impl_.get_service().async_read_some(
|
|
self_->impl_.get_implementation(), buffers,
|
|
handler2.value, self_->impl_.get_executor());
|
|
}
|
|
|
|
private:
|
|
basic_serial_port* self_;
|
|
};
|
|
|
|
#if defined(ASIO_HAS_IOCP)
|
|
detail::io_object_impl<detail::win_iocp_serial_port_service, Executor> impl_;
|
|
#else
|
|
detail::io_object_impl<detail::posix_serial_port_service, Executor> impl_;
|
|
#endif
|
|
};
|
|
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // defined(ASIO_HAS_SERIAL_PORT)
|
|
// || defined(GENERATING_DOCUMENTATION)
|
|
|
|
#endif // ASIO_BASIC_SERIAL_PORT_HPP
|