Rename the extracted boost subdirectory to ndnboost
diff --git a/ndnboost/smart_ptr/detail/spinlock_nt.hpp b/ndnboost/smart_ptr/detail/spinlock_nt.hpp
new file mode 100644
index 0000000..59cc715
--- /dev/null
+++ b/ndnboost/smart_ptr/detail/spinlock_nt.hpp
@@ -0,0 +1,89 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_NT_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SPINLOCK_NT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// Copyright (c) 2008 Peter Dimov
+//
+// 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)
+//
+
+#include <ndnboost/assert.hpp>
+
+namespace ndnboost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+ bool locked_;
+
+public:
+
+ inline bool try_lock()
+ {
+ if( locked_ )
+ {
+ return false;
+ }
+ else
+ {
+ locked_ = true;
+ return true;
+ }
+ }
+
+ inline void lock()
+ {
+ BOOST_ASSERT( !locked_ );
+ locked_ = true;
+ }
+
+ inline void unlock()
+ {
+ BOOST_ASSERT( locked_ );
+ locked_ = false;
+ }
+
+public:
+
+ class scoped_lock
+ {
+ private:
+
+ spinlock & sp_;
+
+ scoped_lock( scoped_lock const & );
+ scoped_lock & operator=( scoped_lock const & );
+
+ public:
+
+ explicit scoped_lock( spinlock & sp ): sp_( sp )
+ {
+ sp.lock();
+ }
+
+ ~scoped_lock()
+ {
+ sp_.unlock();
+ }
+ };
+};
+
+} // namespace detail
+} // namespace ndnboost
+
+#define BOOST_DETAIL_SPINLOCK_INIT { false }
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_NT_HPP_INCLUDED