00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2010 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 00013 the Free Software Foundation, either version 3 of the License, or 00014 (at your 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, see <http://www.gnu.org/licenses/>. 00023 00024 Class 00025 Foam::cpuTimeImpl 00026 00027 Description 00028 Starts timing CPU usage and return elapsed time from start. 00029 00030 This is the platform specific opaque implementation for class cpuTime. 00031 00032 SeeAlso 00033 clockTime 00034 00035 SourceFiles 00036 cpuTimeImpl.C 00037 00038 \*---------------------------------------------------------------------------*/ 00039 00040 #ifndef cpuTimeImpl_H 00041 #define cpuTimeImpl_H 00042 00043 #include <time.h> 00044 #include <sys/times.h> 00045 00046 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00047 00048 namespace Foam 00049 { 00050 00051 /*---------------------------------------------------------------------------*\ 00052 Class cpuTimeImpl Declaration 00053 \*---------------------------------------------------------------------------*/ 00054 00055 class cpuTimeImpl 00056 { 00057 // Private data 00058 00059 static long Hz_; 00060 00061 struct tms startTime_; 00062 mutable struct tms lastTime_; 00063 mutable struct tms newTime_; 00064 00065 static void getTime(struct tms& t); 00066 00067 static double timeDifference 00068 ( 00069 const struct tms& start, 00070 const struct tms& end 00071 ); 00072 00073 00074 public: 00075 00076 // Constructors 00077 00078 //- Construct from components 00079 cpuTimeImpl(); 00080 00081 00082 // Member Functions 00083 00084 // Access 00085 00086 //- Returns CPU time from start of run 00087 double elapsedCpuTime() const; 00088 00089 //- Returns CPU time from last call of cpuTimeIncrement() 00090 double cpuTimeIncrement() const; 00091 }; 00092 00093 00094 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00095 00096 } // End namespace Foam 00097 00098 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00099 00100 #endif 00101 00102 // ************************ vim: set sw=4 sts=4 et: ************************ //
