diff --git a/eo/src/utils/eoUpdatable.h b/eo/src/utils/eoUpdatable.h
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+++ b/eo/src/utils/eoUpdatable.h
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+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoUpdatable.h
+// (c) Maarten Keijzer, Marc Schoenauer and GeNeura Team, 2000
+/* 
+    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; either
+    version 2 of the License, or (at your option) any later version.
+
+    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+             Marc.Schoenauer@polytechnique.fr
+             mkeijzer@dhi.dk
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef _eoUpdatable_h
+#define _eoUpdatable_h
+
+#include <utils/eoUpdater.h>
+
+/**
+    eoUpdatable is a generic class for adding updatation to an existing class
+    Just says it has an update() method
+*/
+class eoUpdatable
+{
+public:
+    virtual void update() = 0;
+};
+
+/**
+   A base class to actually update an eoUpdatable object
+*/
+class eoDynUpdater : public eoUpdater
+{public :   
+    eoDynUpdater(eoUpdatable & _toUpdate) : toUpdate(_toUpdate) {};
+
+    virtual void operator()()
+    {
+        toUpdate.update();
+    }
+
+private:
+    eoUpdatable& toUpdate;
+};
+
+/**
+   An eoUpdater to update an eoUpdatable object every given time interval
+*/
+class eoTimedDynUpdate : public eoDynUpdater
+{
+public :
+    eoTimedDynUpdate(eoUpdatable & _toUpdate, time_t _interval) : 
+    eoDynUpdater(_toUpdate), 
+        interval(_interval), last_time(time(0)), first_time(time(0)) {}
+
+    void operator()(void)
+      {
+	time_t now = time(0);
+	
+	if (now >= last_time + interval)
+	  {
+	    last_time = now;
+	    eoDynUpdater::operator() ();
+	  }
+      }
+private :
+    const time_t interval;
+    time_t last_time;
+    const time_t first_time;
+};
+
+/**
+   An eoUpdater to update an eoUpdatable object every given tic
+*/
+class eoCountedDynUpdate : public eoDynUpdater
+{
+public :
+    eoCountedDynUpdate(eoUpdatable & _toUpdate, unsigned _interval)
+        : eoDynUpdater(_toUpdate), interval(_interval), counter(0) {}
+
+    void operator()(void)
+      {
+	if (++counter % interval == 0)
+	  {
+	    eoDynUpdater::operator() ();
+	  }
+      }
+private :
+    const unsigned interval;
+    unsigned counter;
+};
+
+#endif