| // |
| // detail/impl/win_iocp_serial_port_service.ipp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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_WIN_IOCP_SERIAL_PORT_SERVICE_IPP |
| #define BOOST_ASIO_DETAIL_IMPL_WIN_IOCP_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_IOCP) && defined(BOOST_ASIO_HAS_SERIAL_PORT) |
| |
| #include <cstring> |
| #include <boost/asio/detail/win_iocp_serial_port_service.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| win_iocp_serial_port_service::win_iocp_serial_port_service( |
| boost::asio::io_service& io_service) |
| : handle_service_(io_service) |
| { |
| } |
| |
| void win_iocp_serial_port_service::shutdown_service() |
| { |
| } |
| |
| boost::system::error_code win_iocp_serial_port_service::open( |
| win_iocp_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; |
| } |
| |
| // For convenience, add a leading \\.\ sequence if not already present. |
| std::string name = (device[0] == '\\') ? device : "\\\\.\\" + device; |
| |
| // Open a handle to the serial port. |
| ::HANDLE handle = ::CreateFileA(name.c_str(), |
| GENERIC_READ | GENERIC_WRITE, 0, 0, |
| OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); |
| if (handle == INVALID_HANDLE_VALUE) |
| { |
| DWORD last_error = ::GetLastError(); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| // Determine the initial serial port parameters. |
| using namespace std; // For memset. |
| ::DCB dcb; |
| memset(&dcb, 0, sizeof(DCB)); |
| dcb.DCBlength = sizeof(DCB); |
| if (!::GetCommState(handle, &dcb)) |
| { |
| DWORD last_error = ::GetLastError(); |
| ::CloseHandle(handle); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| // Set some default serial port parameters. This implementation does not |
| // support changing these, so they might as well be in a known state. |
| dcb.fBinary = TRUE; // Win32 only supports binary mode. |
| dcb.fDsrSensitivity = FALSE; |
| dcb.fNull = FALSE; // Do not ignore NULL characters. |
| dcb.fAbortOnError = FALSE; // Ignore serial framing errors. |
| if (!::SetCommState(handle, &dcb)) |
| { |
| DWORD last_error = ::GetLastError(); |
| ::CloseHandle(handle); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| // Set up timeouts so that the serial port will behave similarly to a |
| // network socket. Reads wait for at least one byte, then return with |
| // whatever they have. Writes return once everything is out the door. |
| ::COMMTIMEOUTS timeouts; |
| timeouts.ReadIntervalTimeout = 1; |
| timeouts.ReadTotalTimeoutMultiplier = 0; |
| timeouts.ReadTotalTimeoutConstant = 0; |
| timeouts.WriteTotalTimeoutMultiplier = 0; |
| timeouts.WriteTotalTimeoutConstant = 0; |
| if (!::SetCommTimeouts(handle, &timeouts)) |
| { |
| DWORD last_error = ::GetLastError(); |
| ::CloseHandle(handle); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| // We're done. Take ownership of the serial port handle. |
| if (handle_service_.assign(impl, handle, ec)) |
| ::CloseHandle(handle); |
| return ec; |
| } |
| |
| boost::system::error_code win_iocp_serial_port_service::do_set_option( |
| win_iocp_serial_port_service::implementation_type& impl, |
| win_iocp_serial_port_service::store_function_type store, |
| const void* option, boost::system::error_code& ec) |
| { |
| using namespace std; // For memcpy. |
| |
| ::DCB dcb; |
| memset(&dcb, 0, sizeof(DCB)); |
| dcb.DCBlength = sizeof(DCB); |
| if (!::GetCommState(handle_service_.native(impl), &dcb)) |
| { |
| DWORD last_error = ::GetLastError(); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| if (store(option, dcb, ec)) |
| return ec; |
| |
| if (!::SetCommState(handle_service_.native(impl), &dcb)) |
| { |
| DWORD last_error = ::GetLastError(); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| ec = boost::system::error_code(); |
| return ec; |
| } |
| |
| boost::system::error_code win_iocp_serial_port_service::do_get_option( |
| const win_iocp_serial_port_service::implementation_type& impl, |
| win_iocp_serial_port_service::load_function_type load, |
| void* option, boost::system::error_code& ec) const |
| { |
| using namespace std; // For memset. |
| |
| ::DCB dcb; |
| memset(&dcb, 0, sizeof(DCB)); |
| dcb.DCBlength = sizeof(DCB); |
| if (!::GetCommState(handle_service_.native(impl), &dcb)) |
| { |
| DWORD last_error = ::GetLastError(); |
| ec = boost::system::error_code(last_error, |
| boost::asio::error::get_system_category()); |
| return ec; |
| } |
| |
| return load(option, dcb, ec); |
| } |
| |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // defined(BOOST_ASIO_HAS_IOCP) && defined(BOOST_ASIO_HAS_SERIAL_PORT) |
| |
| #endif // BOOST_ASIO_DETAIL_IMPL_WIN_IOCP_SERIAL_PORT_SERVICE_IPP |