00001 // -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*- 00002 00003 //----------------------------------------------------------------------------- 00004 // eoUpdatable.h 00005 // (c) Maarten Keijzer, Marc Schoenauer and GeNeura Team, 2000 00006 /* 00007 This library is free software; you can redistribute it and/or 00008 modify it under the terms of the GNU Lesser General Public 00009 License as published by the Free Software Foundation; either 00010 version 2 of the License, or (at your option) any later version. 00011 00012 This library is distributed in the hope that it will be useful, 00013 but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 Lesser General Public License for more details. 00016 00017 You should have received a copy of the GNU Lesser General Public 00018 License along with this library; if not, write to the Free Software 00019 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00020 00021 Contact: todos@geneura.ugr.es, http://geneura.ugr.es 00022 Marc.Schoenauer@polytechnique.fr 00023 mkeijzer@dhi.dk 00024 */ 00025 //----------------------------------------------------------------------------- 00026 00027 #ifndef _eoUpdatable_h 00028 #define _eoUpdatable_h 00029 00030 #include <utils/eoUpdater.h> 00031 00036 class eoUpdatable 00037 { 00038 public: 00039 00041 virtual ~eoUpdatable() {}; 00042 00043 virtual void update() = 0; 00044 }; 00045 00046 00047 00051 class eoDynUpdater : public eoUpdater 00052 {public : 00053 eoDynUpdater(eoUpdatable & _toUpdate) : toUpdate(_toUpdate) {}; 00054 00055 virtual void operator()() 00056 { 00057 toUpdate.update(); 00058 } 00059 00060 private: 00061 eoUpdatable& toUpdate; 00062 }; 00063 00067 class eoTimedDynUpdate : public eoDynUpdater 00068 { 00069 public : 00070 eoTimedDynUpdate(eoUpdatable & _toUpdate, time_t _interval) : 00071 eoDynUpdater(_toUpdate), 00072 interval(_interval), last_time(time(0)), first_time(time(0)) {} 00073 00074 void operator()(void) 00075 { 00076 time_t now = time(0); 00077 00078 if (now >= last_time + interval) 00079 { 00080 last_time = now; 00081 eoDynUpdater::operator() (); 00082 } 00083 } 00084 private : 00085 const time_t interval; 00086 time_t last_time; 00087 const time_t first_time; 00088 }; 00089 00093 class eoCountedDynUpdate : public eoDynUpdater 00094 { 00095 public : 00096 eoCountedDynUpdate(eoUpdatable & _toUpdate, unsigned _interval) 00097 : eoDynUpdater(_toUpdate), interval(_interval), counter(0) {} 00098 00099 void operator()(void) 00100 { 00101 if (++counter % interval == 0) 00102 { 00103 eoDynUpdater::operator() (); 00104 } 00105 } 00106 private : 00107 const unsigned interval; 00108 unsigned counter; 00109 }; 00110 00111 #endif