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diff --git a/ETL/ETL/_clock_gettimeofday.h b/ETL/ETL/_clock_gettimeofday.h
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+/*! ========================================================================
+** Extended Template and Library
+** gettimeofday() Clock Description Implementation
+** $Id$
+**
+** Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** General Public License for more details.
+**
+** === N O T E S ===========================================================
+**
+** This is an internal header file, included by other ETL headers.
+** You should not attempt to use it directly.
+**
+** ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __ETL__CLOCK_GETTIMEOFDAY_H
+#define __ETL__CLOCK_GETTIMEOFDAY_H
+
+/* === H E A D E R S ======================================================= */
+
+#include <sys/time.h>
+#include <cmath>
+
+/* === M A C R O S ========================================================= */
+
+/* === T Y P E D E F S ===================================================== */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+_ETL_BEGIN_NAMESPACE
+
+class clock_desc_gettimeofday
+{
+public:
+	typedef double value_type;
+
+	inline static bool realtime()
+	{ return true; }
+
+	inline static bool proctime()
+	{ return false; }
+
+	inline static value_type
+	one_second()
+	{ return 1.0f; }
+
+	inline static value_type precision()
+	{ return one_second()/(value_type)1000000.0f; }
+
+	inline static const char *description()
+	{ return "UNIX gettimeofday()"; };
+
+protected:
+	class timestamp : public timeval
+	{
+		timestamp(int sec, int usec)
+		{ tv_sec=sec; tv_usec=usec; }
+
+		friend class clock_desc_gettimeofday;
+	public:
+		timestamp() { }
+
+
+		inline timestamp operator-(const timestamp &rhs)const
+		{
+			timestamp ret;
+			ret.tv_usec=tv_usec-rhs.tv_usec;
+
+			if(ret.tv_usec<0)
+			{
+				ret.tv_sec=tv_sec-rhs.tv_sec-1;
+				ret.tv_usec+=1000000;
+			}
+			else
+				ret.tv_sec=tv_sec-rhs.tv_sec;
+			return ret;
+		}
+
+		inline timestamp operator+(timestamp rhs)const
+		{
+			rhs.tv_usec+=tv_usec;
+
+			if(rhs.tv_usec>1000000)
+			{
+				rhs.tv_sec+=tv_sec+1;
+				rhs.tv_usec-=1000000;
+			}
+			else
+				rhs.tv_sec+=tv_sec;
+			return rhs;
+		}
+
+		inline bool operator<(const timestamp &rhs)const
+		{ return tv_sec<rhs.tv_sec || tv_usec<rhs.tv_usec; }
+
+		inline bool operator==(const timestamp &rhs)const
+		{ return tv_usec==rhs.tv_usec && tv_sec==rhs.tv_sec; }
+
+		inline bool operator!=(const timestamp &rhs)const
+		{ return tv_usec!=rhs.tv_usec || tv_sec!=rhs.tv_sec; }
+	};
+
+	static void
+	get_current_time(timestamp &x)
+	{ gettimeofday(&x,NULL);}
+
+	static timestamp
+	get_current_time()
+	{ timestamp ret; get_current_time(ret); return ret; }
+
+	static value_type
+	timestamp_to_seconds(const timestamp &x)
+	{ return (value_type)x.tv_sec + precision()*x.tv_usec; }
+
+	static timestamp
+	seconds_to_timestamp(const value_type &x)
+	{ return timestamp((int)floor(x), (int)((x-floor(x))/precision()+0.5)); }
+};
+
+_ETL_END_NAMESPACE
+
+/* === E N D =============================================================== */
+
+#endif
+