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diff --git a/boost/interprocess/sync/lock_options.hpp b/boost/interprocess/sync/lock_options.hpp
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+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2011. 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)
+//
+// See http://www.boost.org/libs/interprocess for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTERPROCESS_LOCK_OPTIONS_HPP
+#define BOOST_INTERPROCESS_LOCK_OPTIONS_HPP
+
+#if (defined _MSC_VER) && (_MSC_VER >= 1200)
+#  pragma once
+#endif
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+
+//!\file
+//!Describes the lock options with associated with interprocess_mutex lock constructors.
+
+namespace boost {
+
+namespace posix_time
+{  class ptime;   }
+
+namespace interprocess {
+
+//!Type to indicate to a mutex lock constructor that must not lock the mutex.
+struct defer_lock_type{};
+//!Type to indicate to a mutex lock constructor that must try to lock the mutex.
+struct try_to_lock_type {};
+//!Type to indicate to a mutex lock constructor that the mutex is already locked.
+struct accept_ownership_type{};
+
+//!An object indicating that the locking
+//!must be deferred.
+static const defer_lock_type      defer_lock      = defer_lock_type();
+
+//!An object indicating that a try_lock()
+//!operation must be executed.
+static const try_to_lock_type     try_to_lock    = try_to_lock_type();
+
+//!An object indicating that the ownership of lockable
+//!object must be accepted by the new owner.
+static const accept_ownership_type  accept_ownership = accept_ownership_type();
+
+} // namespace interprocess {
+} // namespace boost{
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif // BOOST_INTERPROCESS_LOCK_OPTIONS_HPP