diff options
Diffstat (limited to 'src/third_party/boost-1.69.0/boost/asio/detail/impl/win_iocp_serial_port_service.ipp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/asio/detail/impl/win_iocp_serial_port_service.ipp | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/asio/detail/impl/win_iocp_serial_port_service.ipp b/src/third_party/boost-1.69.0/boost/asio/detail/impl/win_iocp_serial_port_service.ipp new file mode 100644 index 00000000000..7dbf9353ee0 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/asio/detail/impl/win_iocp_serial_port_service.ipp @@ -0,0 +1,183 @@ +// +// detail/impl/win_iocp_serial_port_service.ipp +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// 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 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_context& io_context) + : service_base<win_iocp_serial_port_service>(io_context), + handle_service_(io_context) +{ +} + +void win_iocp_serial_port_service::shutdown() +{ +} + +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_handle(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_handle(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_handle(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 |