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diff --git a/ETL/ETL/_condition.h b/ETL/ETL/_condition.h
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+++ b/ETL/ETL/_condition.h
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+/*! ========================================================================
+** Extended Template and Library
+** Mutex Abstraction Class 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__CONDITION_H_
+#define __ETL__CONDITION_H_
+
+/* === H E A D E R S ======================================================= */
+
+/* === M A C R O S ========================================================= */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+_ETL_BEGIN_NAMESPACE
+
+class condition : private mutex
+{
+	bool flag;
+public:
+	condition()
+	{ flag=false; }
+	~condition()
+	{ }
+	void operator()()
+	{ flag=true; }
+	void wait()
+	{
+		mutex::lock lock(*this);
+
+		while(!flag)Yield();
+		flag=false;
+	}
+	void wait_next()
+	{
+		mutex::lock lock(*this);
+
+		flag=false;
+		while(!flag)Yield();
+	}
+};
+
+_ETL_END_NAMESPACE
+
+/* === E X T E R N S ======================================================= */
+
+/* === E N D =============================================================== */
+
+#endif