1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 2004-2010 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
11 OpenFOAM is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation, either version 3 of the License, or
14 (at your option) any later version.
16 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
28 Starts timing CPU usage and return elapsed time from start.
36 \*---------------------------------------------------------------------------*/
42 #include <sys/times.h>
44 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
49 /*---------------------------------------------------------------------------*\
50 Class cpuTime Declaration
51 \*---------------------------------------------------------------------------*/
57 //- Time structure used
58 typedef struct tms timeType;
60 //- Clock-ticks per second
61 static const long Hz_;
65 mutable timeType lastTime_;
66 mutable timeType newTime_;
68 // Private Member Functions
70 //- Retrieve the current time values from the system
71 static void getTime(timeType&);
73 //- Difference between two times
74 static double timeDifference(const timeType& beg, const timeType& end);
81 //- Construct with the current clock time
87 //- Return CPU time (in seconds) from the start
88 double elapsedCpuTime() const;
90 //- Return CPU time (in seconds) since last call to cpuTimeIncrement()
91 double cpuTimeIncrement() const;
95 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
97 } // End namespace Foam
99 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
103 // ************************************************************************* //