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+#ifndef POSIX_TIME_DURATION_HPP___
+#define POSIX_TIME_DURATION_HPP___
+
+/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
+ * Use, modification and distribution is subject to the
+ * Boost Software License, Version 1.0. (See accompanying
+ * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ * Author: Jeff Garland
+ * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $
+ */
+
+#include "boost/date_time/posix_time/posix_time_config.hpp"
+
+namespace boost {
+namespace posix_time {
+
+ //! Allows expression of durations as an hour count
+ /*! \ingroup time_basics
+ */
+ class hours : public time_duration
+ {
+ public:
+ explicit hours(long h) :
+ time_duration(h,0,0)
+ {}
+ };
+
+ //! Allows expression of durations as a minute count
+ /*! \ingroup time_basics
+ */
+ class minutes : public time_duration
+ {
+ public:
+ explicit minutes(long m) :
+ time_duration(0,m,0)
+ {}
+ };
+
+ //! Allows expression of durations as a seconds count
+ /*! \ingroup time_basics
+ */
+ class seconds : public time_duration
+ {
+ public:
+ explicit seconds(long s) :
+ time_duration(0,0,s)
+ {}
+ };
+
+
+ //! Allows expression of durations as milli seconds
+ /*! \ingroup time_basics
+ */
+ typedef date_time::subsecond_duration<time_duration,1000> millisec;
+ typedef date_time::subsecond_duration<time_duration,1000> milliseconds;
+
+ //! Allows expression of durations as micro seconds
+ /*! \ingroup time_basics
+ */
+ typedef date_time::subsecond_duration<time_duration,1000000> microsec;
+ typedef date_time::subsecond_duration<time_duration,1000000> microseconds;
+
+ //This is probably not needed anymore...
+#if defined(BOOST_DATE_TIME_HAS_NANOSECONDS)
+
+ //! Allows expression of durations as nano seconds
+ /*! \ingroup time_basics
+ */
+ typedef date_time::subsecond_duration<time_duration,1000000000> nanosec;
+ typedef date_time::subsecond_duration<time_duration,1000000000> nanoseconds;
+
+
+#endif
+
+
+
+
+} }//namespace posix_time
+
+
+#endif
+