clockValue.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2018-2019 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
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    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.
 
SourceFiles
    clockValue.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef clockValue_H
#define clockValue_H
 
#include <chrono>
#include <string>
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                         Class clockValue Declaration
\*---------------------------------------------------------------------------*/
 
class clockValue
{
    // Private Data
 
        //- Time structure used
        typedef std::chrono::high_resolution_clock::duration value_type;
 
        value_type value_;
 
 
public:
 
    // Constructors
 
        //- Construct zero initialized
        clockValue();
 
        //- Construct from duration with the same clock base
        explicit clockValue(const value_type& value);
 
        //- Construct zero initialized or with current time
        explicit clockValue(bool useNow);
 
 
    // Factory Methods
 
        //- Return the current time value from the system
        inline static clockValue now()
        {
            return clockValue(true);
        }
 
 
    // Member Functions
 
        //- Return the value
        inline const value_type& value() const
        {
            return value_;
        }
 
        //- Reset to zero
        void clear();
 
        //- Update to the current now() time from the system
        void update();
 
        //- The time elapsed from now() since the start time.
        clockValue elapsed() const;
 
        //- The value in seconds (rounded)
        long seconds() const;
 
        //- Format as day-hh:mm:ss string
        std::string str() const;
 
 
    // Operators
 
        //- Conversion operator to seconds in floating point
        operator double() const;
 
        //- Subtract time value
        clockValue& operator-=(const clockValue& rhs);
 
        //- Add time value
        clockValue& operator+=(const clockValue& rhs);
};
 
 
// Global Operators
 
//- Subtraction of clock values
clockValue operator-(const clockValue& a, const clockValue& b);
 
//- Addition of clock values
clockValue operator+(const clockValue& a, const clockValue& b);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //