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diff --git a/src/third_party/boost-1.56.0/boost/asio/posix/stream_descriptor_service.hpp b/src/third_party/boost-1.56.0/boost/asio/posix/stream_descriptor_service.hpp
new file mode 100644
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+++ b/src/third_party/boost-1.56.0/boost/asio/posix/stream_descriptor_service.hpp
@@ -0,0 +1,262 @@
+//
+// posix/stream_descriptor_service.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 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_STREAM_DESCRIPTOR_SERVICE_HPP
+#define BOOST_ASIO_POSIX_STREAM_DESCRIPTOR_SERVICE_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 <cstddef>
+#include <boost/asio/async_result.hpp>
+#include <boost/asio/error.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/asio/detail/reactive_descriptor_service.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace posix {
+
+/// Default service implementation for a stream descriptor.
+class stream_descriptor_service
+#if defined(GENERATING_DOCUMENTATION)
+  : public boost::asio::io_service::service
+#else
+  : public boost::asio::detail::service_base<stream_descriptor_service>
+#endif
+{
+public:
+#if defined(GENERATING_DOCUMENTATION)
+  /// The unique service identifier.
+  static boost::asio::io_service::id id;
+#endif
+
+private:
+  // The type of the platform-specific implementation.
+  typedef detail::reactive_descriptor_service service_impl_type;
+
+public:
+  /// The type of a stream descriptor implementation.
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined implementation_type;
+#else
+  typedef service_impl_type::implementation_type implementation_type;
+#endif
+
+  /// (Deprecated: Use native_handle_type.) The native descriptor type.
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined native_type;
+#else
+  typedef service_impl_type::native_handle_type native_type;
+#endif
+
+  /// The native descriptor type.
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined native_handle_type;
+#else
+  typedef service_impl_type::native_handle_type native_handle_type;
+#endif
+
+  /// Construct a new stream descriptor service for the specified io_service.
+  explicit stream_descriptor_service(boost::asio::io_service& io_service)
+    : boost::asio::detail::service_base<stream_descriptor_service>(io_service),
+      service_impl_(io_service)
+  {
+  }
+
+  /// Construct a new stream descriptor implementation.
+  void construct(implementation_type& impl)
+  {
+    service_impl_.construct(impl);
+  }
+
+#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+  /// Move-construct a new stream descriptor implementation.
+  void move_construct(implementation_type& impl,
+      implementation_type& other_impl)
+  {
+    service_impl_.move_construct(impl, other_impl);
+  }
+
+  /// Move-assign from another stream descriptor implementation.
+  void move_assign(implementation_type& impl,
+      stream_descriptor_service& other_service,
+      implementation_type& other_impl)
+  {
+    service_impl_.move_assign(impl, other_service.service_impl_, other_impl);
+  }
+#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+
+  /// Destroy a stream descriptor implementation.
+  void destroy(implementation_type& impl)
+  {
+    service_impl_.destroy(impl);
+  }
+
+  /// Assign an existing native descriptor to a stream descriptor.
+  boost::system::error_code assign(implementation_type& impl,
+      const native_handle_type& native_descriptor,
+      boost::system::error_code& ec)
+  {
+    return service_impl_.assign(impl, native_descriptor, ec);
+  }
+
+  /// Determine whether the descriptor is open.
+  bool is_open(const implementation_type& impl) const
+  {
+    return service_impl_.is_open(impl);
+  }
+
+  /// Close a stream descriptor implementation.
+  boost::system::error_code close(implementation_type& impl,
+      boost::system::error_code& ec)
+  {
+    return service_impl_.close(impl, ec);
+  }
+
+  /// (Deprecated: Use native_handle().) Get the native descriptor
+  /// implementation.
+  native_type native(implementation_type& impl)
+  {
+    return service_impl_.native_handle(impl);
+  }
+
+  /// Get the native descriptor implementation.
+  native_handle_type native_handle(implementation_type& impl)
+  {
+    return service_impl_.native_handle(impl);
+  }
+
+  /// Release ownership of the native descriptor implementation.
+  native_handle_type release(implementation_type& impl)
+  {
+    return service_impl_.release(impl);
+  }
+
+  /// Cancel all asynchronous operations associated with the descriptor.
+  boost::system::error_code cancel(implementation_type& impl,
+      boost::system::error_code& ec)
+  {
+    return service_impl_.cancel(impl, ec);
+  }
+
+  /// Perform an IO control command on the descriptor.
+  template <typename IoControlCommand>
+  boost::system::error_code io_control(implementation_type& impl,
+      IoControlCommand& command, boost::system::error_code& ec)
+  {
+    return service_impl_.io_control(impl, command, ec);
+  }
+
+  /// Gets the non-blocking mode of the descriptor.
+  bool non_blocking(const implementation_type& impl) const
+  {
+    return service_impl_.non_blocking(impl);
+  }
+
+  /// Sets the non-blocking mode of the descriptor.
+  boost::system::error_code non_blocking(implementation_type& impl,
+      bool mode, boost::system::error_code& ec)
+  {
+    return service_impl_.non_blocking(impl, mode, ec);
+  }
+
+  /// Gets the non-blocking mode of the native descriptor implementation.
+  bool native_non_blocking(const implementation_type& impl) const
+  {
+    return service_impl_.native_non_blocking(impl);
+  }
+
+  /// Sets the non-blocking mode of the native descriptor implementation.
+  boost::system::error_code native_non_blocking(implementation_type& impl,
+      bool mode, boost::system::error_code& ec)
+  {
+    return service_impl_.native_non_blocking(impl, mode, ec);
+  }
+
+  /// Write the given data to the stream.
+  template <typename ConstBufferSequence>
+  std::size_t write_some(implementation_type& impl,
+      const ConstBufferSequence& buffers, boost::system::error_code& ec)
+  {
+    return service_impl_.write_some(impl, buffers, ec);
+  }
+
+  /// Start an asynchronous write.
+  template <typename ConstBufferSequence, typename WriteHandler>
+  BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler,
+      void (boost::system::error_code, std::size_t))
+  async_write_some(implementation_type& impl,
+      const ConstBufferSequence& buffers,
+      BOOST_ASIO_MOVE_ARG(WriteHandler) handler)
+  {
+    boost::asio::detail::async_result_init<
+      WriteHandler, void (boost::system::error_code, std::size_t)> init(
+        BOOST_ASIO_MOVE_CAST(WriteHandler)(handler));
+
+    service_impl_.async_write_some(impl, buffers, init.handler);
+
+    return init.result.get();
+  }
+
+  /// Read some data from the stream.
+  template <typename MutableBufferSequence>
+  std::size_t read_some(implementation_type& impl,
+      const MutableBufferSequence& buffers, boost::system::error_code& ec)
+  {
+    return service_impl_.read_some(impl, buffers, ec);
+  }
+
+  /// Start an asynchronous read.
+  template <typename MutableBufferSequence, typename ReadHandler>
+  BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
+      void (boost::system::error_code, std::size_t))
+  async_read_some(implementation_type& impl,
+      const MutableBufferSequence& buffers,
+      BOOST_ASIO_MOVE_ARG(ReadHandler) handler)
+  {
+    boost::asio::detail::async_result_init<
+      ReadHandler, void (boost::system::error_code, std::size_t)> init(
+        BOOST_ASIO_MOVE_CAST(ReadHandler)(handler));
+
+    service_impl_.async_read_some(impl, buffers, init.handler);
+
+    return init.result.get();
+  }
+
+private:
+  // Destroy all user-defined handler objects owned by the service.
+  void shutdown_service()
+  {
+    service_impl_.shutdown_service();
+  }
+
+  // The platform-specific implementation.
+  service_impl_type service_impl_;
+};
+
+} // 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_STREAM_DESCRIPTOR_SERVICE_HPP