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diff --git a/indra/llcommon/lleventtimer.h b/indra/llcommon/lleventtimer.h
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+/** 
+ * @file lleventtimer.h
+ * @brief Cross-platform objects for doing timing 
+ *
+ * $LicenseInfo:firstyear=2000&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_EVENTTIMER_H					
+#define LL_EVENTTIMER_H
+
+#include "stdtypes.h"
+#include "lldate.h"
+#include "llinstancetracker.h"
+#include "lltimer.h"
+
+// class for scheduling a function to be called at a given frequency (approximate, inprecise)
+class LL_COMMON_API LLEventTimer : public LLInstanceTracker<LLEventTimer>
+{
+public:
+	LLEventTimer(F32 period);	// period is the amount of time between each call to tick() in seconds
+	LLEventTimer(const LLDate& time);
+	virtual ~LLEventTimer();
+	
+	//function to be called at the supplied frequency
+	// Normally return FALSE; TRUE will delete the timer after the function returns.
+	virtual BOOL tick() = 0;
+
+	static void updateClass();
+
+protected:
+	LLTimer mEventTimer;
+	F32 mPeriod;
+};
+
+#endif //LL_EVENTTIMER_H