clockValue.H

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2018-2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::clockValue
 
Description
    Access to high-resolution clock value with some basic operations.
    Used to calculate time durations, elapsed times etc.
 
SourceFiles
    clockValueI.H
    clockValue.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_clockValue_H
#define Foam_clockValue_H
 
#include <chrono>
#include <string>
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                         Class clockValue Declaration
\*---------------------------------------------------------------------------*/
 
class clockValue
{
public:
 
    // Public Types
 
        //- Time structure used
        typedef std::chrono::high_resolution_clock::duration value_type;
 
 
private:
 
    // Private Data
 
        //- The time start point or the time duration.
        value_type value_;
 
 
public:
 
    // Constructors
 
        //- Construct zero initialized
        inline clockValue();
 
        //- Construct with current time.
        //  The bool is for tagged dispatch only (its value is ignored).
        inline explicit clockValue(bool);
 
        //- Copy construct from duration with the same clock base
        inline explicit clockValue(const value_type& value);
 
 
    // Factory Methods
 
        //- The current clock value from the system
        inline static clockValue now();
 
 
    // Member Functions
 
        //- The time duration
        const value_type& value() const noexcept { return value_; }
 
        //- Reset to zero
        inline void clear();
 
        //- Update to the current now() time from the system
        inline void update();
 
        //- The value in seconds (rounded)
        inline long seconds() const;
 
        //- The time duration elapsed until now() since the start point
        inline clockValue elapsed() const;
 
        //- The time elapsed [seconds] until now() since the start point
        inline double elapsedTime() const;
 
        //- Format as day-hh:mm:ss string
        std::string str() const;
 
 
    // Operators
 
        //- Conversion operator to seconds in floating point
        inline operator double() const;
 
        //- Subtract clock value
        inline clockValue& operator-=(const clockValue& rhs);
 
        //- Add clock value
        inline clockValue& operator+=(const clockValue& rhs);
};
 
 
// Global Operators
 
//- Subtraction of clock values
inline clockValue operator-(const clockValue& a, const clockValue& b)
{
    return clockValue(a.value() - b.value());
}
 
//- Addition of clock values
inline clockValue operator+(const clockValue& a, const clockValue& b)
{
    return clockValue(a.value() + b.value());
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "clockValueI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //