cpuTime.C

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#include "cpuTime.H"
#include <unistd.h>

// * * * * * * * * * * * * * * * Static Members  * * * * * * * * * * * * * * //

const long Foam::cpuTime::Hz_(sysconf(_SC_CLK_TCK));


// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

void Foam::cpuTime::getTime(timeType& t)
{
    times(&t);
}


double Foam::cpuTime::timeDifference(const timeType& beg, const timeType& end)
{
    return
    (
        double
        (
            (end.tms_utime + end.tms_stime)
          - (beg.tms_utime + beg.tms_stime)
        )/Hz_
    );
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::cpuTime::cpuTime()
{
    getTime(startTime_);
    lastTime_ = startTime_;
    newTime_ = startTime_;
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

double Foam::cpuTime::elapsedCpuTime() const
{
    getTime(newTime_);
    return timeDifference(startTime_, newTime_);
}


double Foam::cpuTime::cpuTimeIncrement() const
{
    lastTime_ = newTime_;
    getTime(newTime_);
    return timeDifference(lastTime_, newTime_);
}


// ************************************************************************* //