ceph/src/boost/libs/asio/include/boost/asio/detail/impl/reactive_serial_port_service.ipp

   1 //
   2 // detail/impl/reactive_serial_port_service.ipp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 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_REACTIVE_SERIAL_PORT_SERVICE_IPP
  13 #define BOOST_ASIO_DETAIL_IMPL_REACTIVE_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/reactive_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 reactive_serial_port_service::reactive_serial_port_service(
  34     boost::asio::io_service& io_service)
  35   : descriptor_service_(io_service)
  36 {
  37 }
  38
  39 void reactive_serial_port_service::shutdown_service()
  40 {
  41   descriptor_service_.shutdown_service();
  42 }
  43
  44 boost::system::error_code reactive_serial_port_service::open(
  45     reactive_serial_port_service::implementation_type& impl,
  46     const std::string& device, boost::system::error_code& ec)
  47 {
  48   if (is_open(impl))
  49   {
  50     ec = boost::asio::error::already_open;
  51     return ec;
  52   }
  53
  54   descriptor_ops::state_type state = 0;
  55   int fd = descriptor_ops::open(device.c_str(),
  56       O_RDWR | O_NONBLOCK | O_NOCTTY, ec);
  57   if (fd < 0)
  58     return ec;
  59
  60   int s = descriptor_ops::fcntl(fd, F_GETFL, ec);
  61   if (s >= 0)
  62     s = descriptor_ops::fcntl(fd, F_SETFL, s | O_NONBLOCK, ec);
  63   if (s < 0)
  64   {
  65     boost::system::error_code ignored_ec;
  66     descriptor_ops::close(fd, state, ignored_ec);
  67     return ec;
  68   }
  69
  70   // Set up default serial port options.
  71   termios ios;
  72   errno = 0;
  73   s = descriptor_ops::error_wrapper(::tcgetattr(fd, &ios), ec);
  74   if (s >= 0)
  75   {
  76 #if defined(_BSD_SOURCE)
  77     ::cfmakeraw(&ios);
  78 #else
  79     ios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK
  80         | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
  81     ios.c_oflag &= ~OPOST;
  82     ios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
  83     ios.c_cflag &= ~(CSIZE | PARENB);
  84     ios.c_cflag |= CS8;
  85 #endif
  86     ios.c_iflag |= IGNPAR;
  87     ios.c_cflag |= CREAD | CLOCAL;
  88     errno = 0;
  89     s = descriptor_ops::error_wrapper(::tcsetattr(fd, TCSANOW, &ios), ec);
  90   }
  91   if (s < 0)
  92   {
  93     boost::system::error_code ignored_ec;
  94     descriptor_ops::close(fd, state, ignored_ec);
  95     return ec;
  96   }
  97
  98   // We're done. Take ownership of the serial port descriptor.
  99   if (descriptor_service_.assign(impl, fd, ec))
 100   {
 101     boost::system::error_code ignored_ec;
 102     descriptor_ops::close(fd, state, ignored_ec);
 103   }
 104
 105   return ec;
 106 }
 107
 108 boost::system::error_code reactive_serial_port_service::do_set_option(
 109     reactive_serial_port_service::implementation_type& impl,
 110     reactive_serial_port_service::store_function_type store,
 111     const void* option, boost::system::error_code& ec)
 112 {
 113   termios ios;
 114   errno = 0;
 115   descriptor_ops::error_wrapper(::tcgetattr(
 116         descriptor_service_.native_handle(impl), &ios), ec);
 117   if (ec)
 118     return ec;
 119
 120   if (store(option, ios, ec))
 121     return ec;
 122
 123   errno = 0;
 124   descriptor_ops::error_wrapper(::tcsetattr(
 125         descriptor_service_.native_handle(impl), TCSANOW, &ios), ec);
 126   return ec;
 127 }
 128
 129 boost::system::error_code reactive_serial_port_service::do_get_option(
 130     const reactive_serial_port_service::implementation_type& impl,
 131     reactive_serial_port_service::load_function_type load,
 132     void* option, boost::system::error_code& ec) const
 133 {
 134   termios ios;
 135   errno = 0;
 136   descriptor_ops::error_wrapper(::tcgetattr(
 137         descriptor_service_.native_handle(impl), &ios), ec);
 138   if (ec)
 139     return ec;
 140
 141   return load(option, ios, ec);
 142 }
 143
 144 } // namespace detail
 145 } // namespace asio
 146 } // namespace boost
 147
 148 #include <boost/asio/detail/pop_options.hpp>
 149
 150 #endif // !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__)
 151 #endif // defined(BOOST_ASIO_HAS_SERIAL_PORT)
 152
 153 #endif // BOOST_ASIO_DETAIL_IMPL_REACTIVE_SERIAL_PORT_SERVICE_IPP