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diff --git a/src/third_party/boost-1.60.0/boost/asio/posix/descriptor_base.hpp b/src/third_party/boost-1.60.0/boost/asio/posix/descriptor_base.hpp
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+++ b/src/third_party/boost-1.60.0/boost/asio/posix/descriptor_base.hpp
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+//
+// posix/descriptor_base.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot 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_POSIX_DESCRIPTOR_BASE_HPP
+#define BOOST_ASIO_POSIX_DESCRIPTOR_BASE_HPP
+
+#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_POSIX_STREAM_DESCRIPTOR) \
+  || defined(GENERATING_DOCUMENTATION)
+
+#include <boost/asio/detail/io_control.hpp>
+#include <boost/asio/detail/socket_option.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace posix {
+
+/// The descriptor_base class is used as a base for the basic_stream_descriptor
+/// class template so that we have a common place to define the associated
+/// IO control commands.
+class descriptor_base
+{
+public:
+  /// (Deprecated: Use non_blocking().) IO control command to set the blocking
+  /// mode of the descriptor.
+  /**
+   * Implements the FIONBIO IO control command.
+   *
+   * @par Example
+   * @code
+   * boost::asio::posix::stream_descriptor descriptor(io_service); 
+   * ...
+   * boost::asio::descriptor_base::non_blocking_io command(true);
+   * descriptor.io_control(command);
+   * @endcode
+   *
+   * @par Concepts:
+   * IoControlCommand.
+   */
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined non_blocking_io;
+#else
+  typedef boost::asio::detail::io_control::non_blocking_io non_blocking_io;
+#endif
+
+  /// IO control command to get the amount of data that can be read without
+  /// blocking.
+  /**
+   * Implements the FIONREAD IO control command.
+   *
+   * @par Example
+   * @code
+   * boost::asio::posix::stream_descriptor descriptor(io_service); 
+   * ...
+   * boost::asio::descriptor_base::bytes_readable command(true);
+   * descriptor.io_control(command);
+   * std::size_t bytes_readable = command.get();
+   * @endcode
+   *
+   * @par Concepts:
+   * IoControlCommand.
+   */
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined bytes_readable;
+#else
+  typedef boost::asio::detail::io_control::bytes_readable bytes_readable;
+#endif
+
+protected:
+  /// Protected destructor to prevent deletion through this type.
+  ~descriptor_base()
+  {
+  }
+};
+
+} // namespace posix
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
+       //   || defined(GENERATING_DOCUMENTATION)
+
+#endif // BOOST_ASIO_POSIX_DESCRIPTOR_BASE_HPP