ceph/src/boost/boost/asio/detail/io_control.hpp

   1 //
   2 // detail/io_control.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_IO_CONTROL_HPP
  12 #define BOOST_ASIO_DETAIL_IO_CONTROL_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19 #include <cstddef>
  20 #include <boost/asio/detail/socket_types.hpp>
  21
  22 #include <boost/asio/detail/push_options.hpp>
  23
  24 namespace boost {
  25 namespace asio {
  26 namespace detail {
  27 namespace io_control {
  28
  29 // I/O control command for getting number of bytes available.
  30 class bytes_readable
  31 {
  32 public:
  33   // Default constructor.
  34   bytes_readable()
  35     : value_(0)
  36   {
  37   }
  38
  39   // Construct with a specific command value.
  40   bytes_readable(std::size_t value)
  41     : value_(static_cast<detail::ioctl_arg_type>(value))
  42   {
  43   }
  44
  45   // Get the name of the IO control command.
  46   int name() const
  47   {
  48     return static_cast<int>(BOOST_ASIO_OS_DEF(FIONREAD));
  49   }
  50
  51   // Set the value of the I/O control command.
  52   void set(std::size_t value)
  53   {
  54     value_ = static_cast<detail::ioctl_arg_type>(value);
  55   }
  56
  57   // Get the current value of the I/O control command.
  58   std::size_t get() const
  59   {
  60     return static_cast<std::size_t>(value_);
  61   }
  62
  63   // Get the address of the command data.
  64   detail::ioctl_arg_type* data()
  65   {
  66     return &value_;
  67   }
  68
  69   // Get the address of the command data.
  70   const detail::ioctl_arg_type* data() const
  71   {
  72     return &value_;
  73   }
  74
  75 private:
  76   detail::ioctl_arg_type value_;
  77 };
  78
  79 } // namespace io_control
  80 } // namespace detail
  81 } // namespace asio
  82 } // namespace boost
  83
  84 #include <boost/asio/detail/pop_options.hpp>
  85
  86 #endif // BOOST_ASIO_DETAIL_IO_CONTROL_HPP