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00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2005 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software; you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by the 00013 Free Software Foundation; either version 2 of the License, or (at your 00014 option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM; if not, write to the Free Software Foundation, 00023 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00024 00025 Class 00026 cpuTime 00027 00028 Description 00029 Starts timing CPU usage and return elapsed time from start. 00030 00031 SourceFiles 00032 cpuTime.C 00033 00034 \*---------------------------------------------------------------------------*/ 00035 00036 #ifndef cpuTime_H 00037 #define cpuTime_H 00038 00039 #include <time.h> 00040 #include <sys/times.h> 00041 00042 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00043 00044 namespace Foam 00045 { 00046 00047 /*---------------------------------------------------------------------------*\ 00048 Class cpuTime Declaration 00049 \*---------------------------------------------------------------------------*/ 00050 00051 class cpuTime 00052 { 00053 // Private data 00054 00055 static long Hz_; 00056 00057 struct tms startTime_; 00058 mutable struct tms lastTime_; 00059 mutable struct tms newTime_; 00060 00061 static void getTime(struct tms& t); 00062 00063 static double timeDifference 00064 ( 00065 const struct tms& start, 00066 const struct tms& end 00067 ); 00068 00069 00070 public: 00071 00072 // Constructors 00073 00074 //- Construct from components 00075 cpuTime(); 00076 00077 00078 // Member Functions 00079 00080 // Access 00081 00082 //- Returns CPU time from start of run 00083 double elapsedCpuTime() const; 00084 00085 //- Returns CPU time from last call of cpuTimeIncrement() 00086 double cpuTimeIncrement() const; 00087 }; 00088 00089 00090 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00091 00092 } // End namespace Foam 00093 00094 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00095 00096 #endif 00097 00098 // ************************************************************************* //