ceph/src/boost/boost/asio/detail/impl/posix_serial_port_service.ipp

   1 //
   2 // detail/impl/posix_serial_port_service.ipp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2022 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_IMPL_POSIX_SERIAL_PORT_SERVICE_IPP
  13 #define BOOST_ASIO_DETAIL_IMPL_POSIX_SERIAL_PORT_SERVICE_IPP
  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 <cstring>
  25 #include <boost/asio/detail/posix_serial_port_service.hpp>
  26
  27 #include <boost/asio/detail/push_options.hpp>
  28
  29 namespace boost {
  30 namespace asio {
  31 namespace detail {
  32
  33 posix_serial_port_service::posix_serial_port_service(
  34     execution_context& context)
  35   : execution_context_service_base<posix_serial_port_service>(context),
  36     descriptor_service_(context)
  37 {
  38 }
  39
  40 void posix_serial_port_service::shutdown()
  41 {
  42   descriptor_service_.shutdown();
  43 }
  44
  45 boost::system::error_code posix_serial_port_service::open(
  46     posix_serial_port_service::implementation_type& impl,
  47     const std::string& device, boost::system::error_code& ec)
  48 {
  49   if (is_open(impl))
  50   {
  51     ec = boost::asio::error::already_open;
  52     return ec;
  53   }
  54
  55   descriptor_ops::state_type state = 0;
  56   int fd = descriptor_ops::open(device.c_str(),
  57       O_RDWR | O_NONBLOCK | O_NOCTTY, ec);
  58   if (fd < 0)
  59     return ec;
  60
  61   int s = descriptor_ops::fcntl(fd, F_GETFL, ec);
  62   if (s >= 0)
  63     s = descriptor_ops::fcntl(fd, F_SETFL, s | O_NONBLOCK, ec);
  64   if (s < 0)
  65   {
  66     boost::system::error_code ignored_ec;
  67     descriptor_ops::close(fd, state, ignored_ec);
  68     return ec;
  69   }
  70
  71   // Set up default serial port options.
  72   termios ios;
  73   s = ::tcgetattr(fd, &ios);
  74   descriptor_ops::get_last_error(ec, s < 0);
  75   if (s >= 0)
  76   {
  77 #if defined(_BSD_SOURCE) || defined(_DEFAULT_SOURCE)
  78     ::cfmakeraw(&ios);
  79 #else
  80     ios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK
  81         | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
  82     ios.c_oflag &= ~OPOST;
  83     ios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
  84     ios.c_cflag &= ~(CSIZE | PARENB);
  85     ios.c_cflag |= CS8;
  86 #endif
  87     ios.c_iflag |= IGNPAR;
  88     ios.c_cflag |= CREAD | CLOCAL;
  89     s = ::tcsetattr(fd, TCSANOW, &ios);
  90     descriptor_ops::get_last_error(ec, s < 0);
  91   }
  92   if (s < 0)
  93   {
  94     boost::system::error_code ignored_ec;
  95     descriptor_ops::close(fd, state, ignored_ec);
  96     return ec;
  97   }
  98
  99   // We're done. Take ownership of the serial port descriptor.
 100   if (descriptor_service_.assign(impl, fd, ec))
 101   {
 102     boost::system::error_code ignored_ec;
 103     descriptor_ops::close(fd, state, ignored_ec);
 104   }
 105
 106   return ec;
 107 }
 108
 109 boost::system::error_code posix_serial_port_service::do_set_option(
 110     posix_serial_port_service::implementation_type& impl,
 111     posix_serial_port_service::store_function_type store,
 112     const void* option, boost::system::error_code& ec)
 113 {
 114   termios ios;
 115   int s = ::tcgetattr(descriptor_service_.native_handle(impl), &ios);
 116   descriptor_ops::get_last_error(ec, s < 0);
 117   if (s < 0)
 118     return ec;
 119
 120   if (store(option, ios, ec))
 121     return ec;
 122
 123   s = ::tcsetattr(descriptor_service_.native_handle(impl), TCSANOW, &ios);
 124   descriptor_ops::get_last_error(ec, s < 0);
 125   return ec;
 126 }
 127
 128 boost::system::error_code posix_serial_port_service::do_get_option(
 129     const posix_serial_port_service::implementation_type& impl,
 130     posix_serial_port_service::load_function_type load,
 131     void* option, boost::system::error_code& ec) const
 132 {
 133   termios ios;
 134   int s = ::tcgetattr(descriptor_service_.native_handle(impl), &ios);
 135   descriptor_ops::get_last_error(ec, s < 0);
 136   if (s < 0)
 137     return ec;
 138
 139   return load(option, ios, ec);
 140 }
 141
 142 } // namespace detail
 143 } // namespace asio
 144 } // namespace boost
 145
 146 #include <boost/asio/detail/pop_options.hpp>
 147
 148 #endif // !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
 149 #endif // defined(BOOST_ASIO_HAS_SERIAL_PORT)
 150
 151 #endif // BOOST_ASIO_DETAIL_IMPL_POSIX_SERIAL_PORT_SERVICE_IPP