00001 /*************************************************************************** 00002 ** 00003 ** This file is part of QGpCoreTools. 00004 ** 00005 ** This library is free software; you can redistribute it and/or 00006 ** modify it under the terms of the GNU Lesser General Public 00007 ** License as published by the Free Software Foundation; either 00008 ** version 2.1 of the License, or (at your option) any later version. 00009 ** 00010 ** This file is distributed in the hope that it will be useful, but WITHOUT 00011 ** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00012 ** FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 00013 ** License for more details. 00014 ** 00015 ** You should have received a copy of the GNU Lesser General Public 00016 ** License along with this library; if not, write to the Free Software 00017 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00018 ** 00019 ** See http://www.geopsy.org for more information. 00020 ** 00021 ** Created: 2010-09-09 00022 ** Authors: 00023 ** Marc Wathelet (LGIT, Grenoble, France) 00024 ** 00025 ***************************************************************************/ 00026 00027 #ifndef APPLICATIONCLOCK_H 00028 #define APPLICATIONCLOCK_H 00029 00030 #include <sys/time.h> 00031 #include <QtCore> 00032 00033 #include "QGpCoreToolsDLLExport.h" 00034 00035 // Approximately 584492 years... 00036 // Add suffix ULL to have a long long constant (required by 32 bit systems) 00037 #define MAXIMUM_APPLICATION_LIFETIME 0xFFFFFFFFFFFFFFFFULL 00038 00039 namespace QGpCoreTools { 00040 00041 class QGPCORETOOLS_EXPORT ApplicationClock 00042 { 00043 public: 00044 ApplicationClock(); 00045 00046 static quint64 elapsed() {return _instance.elapsedInternal();} 00047 private: 00048 quint64 elapsedInternal(); 00049 static ApplicationClock _instance; 00050 quint64 _reference; 00051 }; 00052 00053 } // namespace QGpCoreTools 00054 00055 #endif // APPLICATIONCLOCK_H
