New base class eoUpdatable.h - for objects that need upates in eoCheckPoints

Also contains the class eoDynUpdater. They are eoUpdater, they receive an eoUpdatable
at construct time, and call their upate() method in their operator() method

eo/src/utils/eoUpdatable.h

@@ -0,0 +1,105 @@
+// -*- 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