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diff --git a/src/third_party/boost-1.56.0/boost/asio/detail/impl/reactive_descriptor_service.ipp b/src/third_party/boost-1.56.0/boost/asio/detail/impl/reactive_descriptor_service.ipp
new file mode 100644
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+++ b/src/third_party/boost-1.56.0/boost/asio/detail/impl/reactive_descriptor_service.ipp
@@ -0,0 +1,210 @@
+//
+// detail/impl/reactive_descriptor_service.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// 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_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP
+#define BOOST_ASIO_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP
+
+#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_WINDOWS) \
+  && !defined(BOOST_ASIO_WINDOWS_RUNTIME) \
+  && !defined(__CYGWIN__)
+
+#include <boost/asio/error.hpp>
+#include <boost/asio/detail/reactive_descriptor_service.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+reactive_descriptor_service::reactive_descriptor_service(
+    boost::asio::io_service& io_service)
+  : reactor_(boost::asio::use_service<reactor>(io_service))
+{
+  reactor_.init_task();
+}
+
+void reactive_descriptor_service::shutdown_service()
+{
+}
+
+void reactive_descriptor_service::construct(
+    reactive_descriptor_service::implementation_type& impl)
+{
+  impl.descriptor_ = -1;
+  impl.state_ = 0;
+}
+
+void reactive_descriptor_service::move_construct(
+    reactive_descriptor_service::implementation_type& impl,
+    reactive_descriptor_service::implementation_type& other_impl)
+{
+  impl.descriptor_ = other_impl.descriptor_;
+  other_impl.descriptor_ = -1;
+
+  impl.state_ = other_impl.state_;
+  other_impl.state_ = 0;
+
+  reactor_.move_descriptor(impl.descriptor_,
+      impl.reactor_data_, other_impl.reactor_data_);
+}
+
+void reactive_descriptor_service::move_assign(
+    reactive_descriptor_service::implementation_type& impl,
+    reactive_descriptor_service& other_service,
+    reactive_descriptor_service::implementation_type& other_impl)
+{
+  destroy(impl);
+
+  impl.descriptor_ = other_impl.descriptor_;
+  other_impl.descriptor_ = -1;
+
+  impl.state_ = other_impl.state_;
+  other_impl.state_ = 0;
+
+  other_service.reactor_.move_descriptor(impl.descriptor_,
+      impl.reactor_data_, other_impl.reactor_data_);
+}
+
+void reactive_descriptor_service::destroy(
+    reactive_descriptor_service::implementation_type& impl)
+{
+  if (is_open(impl))
+  {
+    BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "close"));
+
+    reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_,
+        (impl.state_ & descriptor_ops::possible_dup) == 0);
+  }
+
+  boost::system::error_code ignored_ec;
+  descriptor_ops::close(impl.descriptor_, impl.state_, ignored_ec);
+}
+
+boost::system::error_code reactive_descriptor_service::assign(
+    reactive_descriptor_service::implementation_type& impl,
+    const native_handle_type& native_descriptor, boost::system::error_code& ec)
+{
+  if (is_open(impl))
+  {
+    ec = boost::asio::error::already_open;
+    return ec;
+  }
+
+  if (int err = reactor_.register_descriptor(
+        native_descriptor, impl.reactor_data_))
+  {
+    ec = boost::system::error_code(err,
+        boost::asio::error::get_system_category());
+    return ec;
+  }
+
+  impl.descriptor_ = native_descriptor;
+  impl.state_ = descriptor_ops::possible_dup;
+  ec = boost::system::error_code();
+  return ec;
+}
+
+boost::system::error_code reactive_descriptor_service::close(
+    reactive_descriptor_service::implementation_type& impl,
+    boost::system::error_code& ec)
+{
+  if (is_open(impl))
+  {
+    BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "close"));
+
+    reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_,
+        (impl.state_ & descriptor_ops::possible_dup) == 0);
+  }
+
+  descriptor_ops::close(impl.descriptor_, impl.state_, ec);
+
+  // The descriptor is closed by the OS even if close() returns an error.
+  //
+  // (Actually, POSIX says the state of the descriptor is unspecified. On
+  // Linux the descriptor is apparently closed anyway; e.g. see
+  //   http://lkml.org/lkml/2005/9/10/129
+  // We'll just have to assume that other OSes follow the same behaviour.)
+  construct(impl);
+
+  return ec;
+}
+
+reactive_descriptor_service::native_handle_type
+reactive_descriptor_service::release(
+    reactive_descriptor_service::implementation_type& impl)
+{
+  native_handle_type descriptor = impl.descriptor_;
+
+  if (is_open(impl))
+  {
+    BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "release"));
+
+    reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_, false);
+    construct(impl);
+  }
+
+  return descriptor;
+}
+
+boost::system::error_code reactive_descriptor_service::cancel(
+    reactive_descriptor_service::implementation_type& impl,
+    boost::system::error_code& ec)
+{
+  if (!is_open(impl))
+  {
+    ec = boost::asio::error::bad_descriptor;
+    return ec;
+  }
+
+  BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "cancel"));
+
+  reactor_.cancel_ops(impl.descriptor_, impl.reactor_data_);
+  ec = boost::system::error_code();
+  return ec;
+}
+
+void reactive_descriptor_service::start_op(
+    reactive_descriptor_service::implementation_type& impl,
+    int op_type, reactor_op* op, bool is_continuation,
+    bool is_non_blocking, bool noop)
+{
+  if (!noop)
+  {
+    if ((impl.state_ & descriptor_ops::non_blocking) ||
+        descriptor_ops::set_internal_non_blocking(
+          impl.descriptor_, impl.state_, true, op->ec_))
+    {
+      reactor_.start_op(op_type, impl.descriptor_,
+          impl.reactor_data_, op, is_continuation, is_non_blocking);
+      return;
+    }
+  }
+
+  reactor_.post_immediate_completion(op, is_continuation);
+}
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // !defined(BOOST_ASIO_WINDOWS)
+       //   && !defined(BOOST_ASIO_WINDOWS_RUNTIME)
+       //   && !defined(__CYGWIN__)
+
+#endif // BOOST_ASIO_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP