--- /dev/null
+#ifndef BOOST_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
+#define BOOST_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// boost/detail/lightweight_mutex.hpp - lightweight mutex
+//
+// Copyright (c) 2002, 2003 Peter Dimov and Multi Media Ltd.
+//
+// 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)
+//
+// typedef <unspecified> boost::detail::lightweight_mutex;
+//
+// boost::detail::lightweight_mutex is a header-only implementation of
+// a subset of the Mutex concept requirements:
+//
+// http://www.boost.org/doc/html/threads/concepts.html#threads.concepts.Mutex
+//
+// It maps to a CRITICAL_SECTION on Windows or a pthread_mutex on POSIX.
+//
+
+#include <boost/config.hpp>
+
+#if !defined(BOOST_HAS_THREADS)
+# include <boost/detail/lwm_nop.hpp>
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
+# include <boost/detail/lwm_win32_cs.hpp>
+#elif defined(BOOST_HAS_PTHREADS)
+# include <boost/detail/lwm_pthreads.hpp>
+#else
+// Use #define BOOST_DISABLE_THREADS to avoid the error
+# error Unrecognized threading platform
+#endif
+
+#endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
--- /dev/null
+#ifndef BOOST_DETAIL_LWM_NOP_HPP_INCLUDED
+#define BOOST_DETAIL_LWM_NOP_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// boost/detail/lwm_nop.hpp
+//
+// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//
+// 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)
+//
+
+namespace boost
+{
+
+namespace detail
+{
+
+class lightweight_mutex
+{
+public:
+
+ typedef lightweight_mutex scoped_lock;
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_LWM_NOP_HPP_INCLUDED