00001 /*************************************************************************** 00002 tag: Peter Soetens Tue Apr 5 16:53:24 CEST 2005 ConditionOnce.cxx 00003 00004 ConditionOnce.cxx - description 00005 ------------------- 00006 begin : Tue April 05 2005 00007 copyright : (C) 2005 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 00040 #include "ConditionOnce.hpp" 00041 00042 namespace RTT { 00043 using namespace scripting; 00044 using namespace base; 00045 00046 ConditionOnce::ConditionOnce(bool what) : ran( false ), _what(what) 00047 {} 00048 00049 ConditionOnce::~ConditionOnce() 00050 {} 00051 00052 bool ConditionOnce::evaluate() 00053 { 00054 if ( ran == true ) 00055 return !_what; 00056 else 00057 ran = true; 00058 return _what; 00059 } 00060 00061 void ConditionOnce::reset() 00062 { 00063 ran = false; 00064 } 00065 00066 ConditionInterface* ConditionOnce::clone() const 00067 { 00068 return new ConditionOnce( _what ); 00069 } 00070 } 00071