subCycle.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
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::subCycle
 
Description
    Perform a subCycleTime on a field or list of fields.
 
\*---------------------------------------------------------------------------*/
 
#ifndef subCycle_H
#define subCycle_H
 
#include "subCycleTime.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                        Class subCycleField Declaration
\*---------------------------------------------------------------------------*/
 
template<class GeometricField>
class subCycleField
{
    // Private Data
 
        //- Reference to the field being sub-cycled
        GeometricField& gf_;
 
        //- Reference to the field old-time field being sub-cycled
        //  Needed to avoid calls to oldTime() which may cause
        //  unexpected updates of the old-time field
        GeometricField& gf0_;
 
        //- Copy of the "real" old-time value of the field
        tmp<GeometricField> gf_0_;
 
 
public:
 
    //- Type of the field
    typedef GeometricField FieldsType;
 
    // Constructors
 
        //- Construct from field and number of sub-cycles
        subCycleField
        (
            GeometricField& gf,
            const label nSubCycles
        )
        :
            gf_(gf),
            gf0_(gf.oldTimeRef())
        {
            if (nSubCycles > 1)
            {
                gf_0_ = GeometricField::New(gf0_.name() + "_", gf0_);
            }
        }
 
 
    //- Destructor
    ~subCycleField()
    {
        if (gf_0_.valid())
        {
            // Reset the old-time field
            gf0_ = gf_0_;
 
            // Correct the time index of the field
            // to correspond to the global time
            gf_.timeIndex() = time().timeIndex();
            gf0_.timeIndex() = time().timeIndex();
        }
    }
 
    //- Access to time
    const Time& time() const
    {
        return gf_.time();
    }
 
    //- Correct the time index of the field to correspond to
    //  the sub-cycling time.
    //
    //  The time index is incremented to protect the old-time value from
    //  being updated at the beginning of the time-loop in the case of
    //  outer iteration
    void updateTimeIndex()
    {
        gf_.timeIndex() = time().timeIndex() + 1;
        gf0_.timeIndex() = time().timeIndex() + 1;
    }
};
 
 
/*---------------------------------------------------------------------------*\
                       Class subCycleFields Declaration
\*---------------------------------------------------------------------------*/
 
template<class GeometricField>
class subCycleFields
{
    // Private Data
 
        //- List of pointers to the fields being sub-cycled
        List<GeometricField*> gfPtrs_;
 
        //- List of pointers to the fields old-time field being sub-cycled
        //  Needed to avoid calls to oldTime() which may cause
        //  unexpected updates of the old-time field
        List<GeometricField*> gf0Ptrs_;
 
        //- Copy of the "real" old-time value of the fields
        PtrList<GeometricField> gf_0Ptrs_;
 
 
public:
 
    //- Type of the list of fields
    typedef List<GeometricField*> FieldsType;
 
    // Constructors
 
        //- Construct from field list and number of sub-cycles
        subCycleFields
        (
            List<GeometricField*>& gfPtrs,
            const label nSubCycles
        )
        :
            gfPtrs_(gfPtrs),
            gf0Ptrs_(gfPtrs.size())
        {
            if (nSubCycles > 1)
            {
                gf_0Ptrs_.setSize(gfPtrs.size());
 
                forAll(gfPtrs_, i)
                {
                    gf0Ptrs_[i] = &gfPtrs_[i]->oldTimeRef();
 
                    gf_0Ptrs_.set
                    (
                        i,
                        new volScalarField
                        (
                            gf0Ptrs_[i]->name() + "_",
                            *gf0Ptrs_[i]
                        )
                    );
                }
            }
        }
 
 
    //- Destructor
    ~subCycleFields()
    {
        if (gf_0Ptrs_.size())
        {
            forAll(gfPtrs_, i)
            {
                // Reset the old-time fields
                *gf0Ptrs_[i] = gf_0Ptrs_[i];
 
                // Correct the time index of the fields
                // to correspond to the global time
                gfPtrs_[i]->timeIndex() = time().timeIndex();
                gf0Ptrs_[i]->timeIndex() = time().timeIndex();
            }
        }
    }
 
    //- Access to time
    const Time& time() const
    {
        return gfPtrs_[0]->time();
    }
 
    //- Correct the time index of the fields to correspond to
    //  the sub-cycling time.
    //
    //  The time index is incremented to protect the old-time value from
    //  being updated at the beginning of the time-loop in the case of
    //  outer iteration
    void updateTimeIndex()
    {
        forAll(gfPtrs_, i)
        {
            gfPtrs_[i]->timeIndex() = time().timeIndex() + 1;
            gf0Ptrs_[i]->timeIndex() = time().timeIndex() + 1;
        }
    }
};
 
 
/*---------------------------------------------------------------------------*\
                          Class subCycle Declaration
\*---------------------------------------------------------------------------*/
 
template
<
    class GeometricField,
    template<class> class SubCycleField = subCycleField
>
class subCycle
:
    public SubCycleField<GeometricField>,
    public subCycleTime
{
 
public:
 
    // Constructors
 
        //- Construct field and number of sub-cycles
        subCycle
        (
            typename SubCycleField<GeometricField>::FieldsType& gf,
            const label nSubCycles
        )
        :
            SubCycleField<GeometricField>(gf, nSubCycles),
            subCycleTime(const_cast<Time&>(this->time()), nSubCycles)
        {
            if (nSubCycles > 1)
            {
                // Update the field time index to correspond
                // to the sub-cycle time
                this->updateTimeIndex();
            }
        }
 
        //- Disallow default bitwise copy construction
        subCycle(const subCycle<GeometricField>&) = delete;
 
 
    //- Destructor
    //  End the subCycleTime, which restores the time state
    ~subCycle()
    {
        endSubCycle();
    }
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const subCycle<GeometricField>&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //