1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2009 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 the
13 Free Software Foundation; either version 2 of the License, or (at your
14 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, write to the Free Software Foundation,
23 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 Starts timing CPU usage and return elapsed time from start.
28 \*---------------------------------------------------------------------------*/
34 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
39 // * * * * * * * * * * * * * * * Static Members * * * * * * * * * * * * * * //
41 long cpuTime::Hz_(sysconf(_SC_CLK_TCK));
44 // * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
46 void cpuTime::getTime(struct tms& t)
52 double cpuTime::timeDifference
54 const struct tms& start,
62 (end.tms_utime + end.tms_stime)
63 - (start.tms_utime + start.tms_stime)
69 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
74 lastTime_ = startTime_;
75 newTime_ = startTime_;
79 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
81 double cpuTime::elapsedCpuTime() const
84 return timeDifference(startTime_, newTime_);
88 double cpuTime::cpuTimeIncrement() const
92 return timeDifference(lastTime_, newTime_);
96 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
98 } // End namespace Foam
100 // ************************************************************************* //