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diff --git a/src/third_party/boost-1.60.0/boost/thread/executors/thread_executor.hpp b/src/third_party/boost-1.60.0/boost/thread/executors/thread_executor.hpp
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+// Copyright (C) 2014 Vicente J. Botet Escriba
+//
+//  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)
+//
+// 2014/01 Vicente J. Botet Escriba
+//    first implementation of a thread_executor.
+
+#ifndef BOOST_THREAD_THREAD_EXECUTOR_HPP
+#define BOOST_THREAD_THREAD_EXECUTOR_HPP
+
+#include <boost/thread/detail/config.hpp>
+#include <boost/thread/detail/delete.hpp>
+#include <boost/thread/detail/move.hpp>
+#include <boost/thread/executors/work.hpp>
+#include <boost/thread/executors/executor.hpp>
+#include <boost/thread/thread_only.hpp>
+#include <boost/thread/scoped_thread.hpp>
+#include <boost/thread/csbl/vector.hpp>
+#include <boost/thread/concurrent_queues/queue_op_status.hpp>
+
+#include <boost/config/abi_prefix.hpp>
+
+namespace boost
+{
+namespace executors
+{
+  class thread_executor
+  {
+  public:
+    /// type-erasure to store the works to do
+    typedef  executors::work work;
+    bool closed_;
+    typedef scoped_thread<> thread_t;
+    typedef csbl::vector<thread_t> threads_type;
+    threads_type threads_;
+    mutable mutex mtx_;
+
+    /**
+     * Effects: try to execute one task.
+     * Returns: whether a task has been executed.
+     * Throws: whatever the current task constructor throws or the task() throws.
+     */
+    bool try_executing_one()
+    {
+      return false;
+    }
+
+  public:
+    /// thread_executor is not copyable.
+    BOOST_THREAD_NO_COPYABLE(thread_executor)
+
+    /**
+     * \b Effects: creates a inline executor that runs closures immediately.
+     *
+     * \b Throws: Nothing.
+     */
+    thread_executor()
+    : closed_(false)
+    {
+    }
+    /**
+     * \b Effects: Waits for closures (if any) to complete, then joins and destroys the threads.
+     *
+     * \b Synchronization: The completion of all the closures happen before the completion of the \c thread_executor destructor.
+     */
+    ~thread_executor()
+    {
+      // signal to all the worker thread that there will be no more submissions.
+      close();
+      // all the scoped threads will join before destroying
+    }
+
+    /**
+     * \b Effects: close the \c thread_executor for submissions.
+     * The loop will work until there is no more closures to run.
+     */
+    void close()
+    {
+      lock_guard<mutex> lk(mtx_);
+      closed_ = true;
+    }
+
+    /**
+     * \b Returns: whether the pool is closed for submissions.
+     */
+    bool closed(lock_guard<mutex>& )
+    {
+      return closed_;
+    }
+    bool closed()
+    {
+      lock_guard<mutex> lk(mtx_);
+      return closed(lk);
+    }
+
+    /**
+     * \b Requires: \c Closure is a model of \c Callable(void()) and a model of \c CopyConstructible/MoveConstructible.
+     *
+     * \b Effects: The specified \c closure will be scheduled for execution at some point in the future.
+     * If invoked closure throws an exception the \c thread_executor will call \c std::terminate, as is the case with threads.
+     *
+     * \b Synchronization: completion of \c closure on a particular thread happens before destruction of thread's thread local variables.
+     *
+     * \b Throws: \c sync_queue_is_closed if the thread pool is closed.
+     * Whatever exception that can be throw while storing the closure.
+     */
+
+#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+    template <typename Closure>
+    void submit(Closure & closure)
+    {
+      lock_guard<mutex> lk(mtx_);
+      if (closed(lk))  BOOST_THROW_EXCEPTION( sync_queue_is_closed() );
+      threads_.reserve(threads_.size() + 1);
+      thread th(closure);
+      threads_.push_back(thread_t(boost::move(th)));
+    }
+#endif
+    void submit(void (*closure)())
+    {
+      lock_guard<mutex> lk(mtx_);
+      if (closed(lk))  BOOST_THROW_EXCEPTION( sync_queue_is_closed() );
+      threads_.reserve(threads_.size() + 1);
+      thread th(closure);
+      threads_.push_back(thread_t(boost::move(th)));
+    }
+
+    template <typename Closure>
+    void submit(BOOST_THREAD_FWD_REF(Closure) closure)
+    {
+      lock_guard<mutex> lk(mtx_);
+      if (closed(lk))  BOOST_THROW_EXCEPTION( sync_queue_is_closed() );
+      threads_.reserve(threads_.size() + 1);
+      thread th(boost::forward<Closure>(closure));
+      threads_.push_back(thread_t(boost::move(th)));
+    }
+
+    /**
+     * \b Requires: This must be called from an scheduled task.
+     *
+     * \b Effects: reschedule functions until pred()
+     */
+    template <typename Pred>
+    bool reschedule_until(Pred const&)
+    {
+      return false;
+    }
+
+  };
+}
+using executors::thread_executor;
+}
+
+#include <boost/config/abi_suffix.hpp>
+
+#endif