00001 /*************************************************************************** 00002 tag: Peter Soetens Thu Oct 10 16:16:57 CEST 2002 ConditionExpire.hpp 00003 00004 ConditionExpire.hpp - description 00005 ------------------- 00006 begin : Thu October 10 2002 00007 copyright : (C) 2002 Peter Soetens 00008 email : peter.soetens@mech.kuleuven.ac.be 00009 00010 *************************************************************************** 00011 * This library is free software; you can redistribute it and/or * 00012 * modify it under the terms of the GNU General Public * 00013 * License as published by the Free Software Foundation; * 00014 * version 2 of the License. * 00015 * * 00016 * As a special exception, you may use this file as part of a free * 00017 * software library without restriction. Specifically, if other files * 00018 * instantiate templates or use macros or inline functions from this * 00019 * file, or you compile this file and link it with other files to * 00020 * produce an executable, this file does not by itself cause the * 00021 * resulting executable to be covered by the GNU General Public * 00022 * License. This exception does not however invalidate any other * 00023 * reasons why the executable file might be covered by the GNU General * 00024 * Public License. * 00025 * * 00026 * This library is distributed in the hope that it will be useful, * 00027 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00028 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 00029 * Lesser General Public License for more details. * 00030 * * 00031 * You should have received a copy of the GNU General Public * 00032 * License along with this library; if not, write to the Free Software * 00033 * Foundation, Inc., 59 Temple Place, * 00034 * Suite 330, Boston, MA 02111-1307 USA * 00035 * * 00036 ***************************************************************************/ 00037 00038 00039 #ifndef CONDITIONEXPIRE_HPP 00040 #define CONDITIONEXPIRE_HPP 00041 00042 #include "ConditionInterface.hpp" 00043 #include "../os/TimeService.hpp" 00044 00045 namespace RTT 00046 { namespace scripting { 00047 00054 class RTT_SCRIPTING_API ConditionExpire 00055 : public ConditionInterface 00056 { 00057 typedef os::TimeService::ticks ticks; 00058 00059 public: 00065 ConditionExpire( ticks t ) 00066 : time( t ), hb( os::TimeService::Instance() ) 00067 { 00068 timestamp = hb->getTicks(); 00069 } 00070 00071 virtual ~ConditionExpire() 00072 {} 00073 00074 virtual bool evaluate() 00075 { 00076 return ( time > hb->ticksSince(timestamp) ); 00077 } 00078 00079 virtual void reset() 00080 { 00081 timestamp = hb->getTicks(); 00082 } 00083 00084 virtual ConditionInterface* clone() const 00085 { 00086 return new ConditionExpire( time ); 00087 } 00088 00089 private: 00093 ticks time; 00094 ticks timestamp; 00098 os::TimeService *hb; 00099 }; 00100 00101 }} 00102 00103 #endif