PetscTools.hpp

/*

Copyright (C) University of Oxford, 2005-2009

University of Oxford means the Chancellor, Masters and Scholars of the
University of Oxford, having an administrative office at Wellington
Square, Oxford OX1 2JD, UK.

This file is part of Chaste.

Chaste is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 2.1 of the License, or
(at your option) any later version.

Chaste 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 Lesser General Public
License for more details. The offer of Chaste under the terms of the
License is subject to the License being interpreted in accordance with
English Law and subject to any action against the University of Oxford
being under the jurisdiction of the English Courts.

You should have received a copy of the GNU Lesser General Public License
along with Chaste. If not, see <http://www.gnu.org/licenses/>.

*/


#ifndef PETSCTOOLS_HPP_
#define PETSCTOOLS_HPP_

#include <string>
#include <vector>

#ifndef SPECIAL_SERIAL
#include <petsc.h>
#include <petscvec.h>
#include <petscmat.h>
#endif //SPECIAL_SERIAL

#define EXIT_IF_PARALLEL if(!PetscTools::IsSequential()){TS_TRACE("This test does not pass in parallel yet.");return;}
#define EXIT_IF_SEQUENTIAL if(PetscTools::IsSequential()){TS_TRACE("This test is not meant to be executed in sequential.");return;}

class PetscTools
{
private:
    static bool mPetscIsInitialised;

    static unsigned mNumProcessors;

    static unsigned mRank;
    
    static inline void CheckCache()
    {
        if (mNumProcessors == 0)
        {
            ResetCache();
        }
    }

public:

    static const unsigned MASTER_RANK=0;

    static void ResetCache();

    static bool IsSequential();

    static unsigned GetNumProcs();

    static unsigned GetMyRank();

    static bool AmMaster();

    static void Barrier();

#ifndef SPECIAL_SERIAL

    static Vec CreateVec(int size);

    static Vec CreateVec(int size, double value);

    static Vec CreateVec(std::vector<double> data);

    static void SetupMat(Mat& rMat, int numRows, int numColumns,
                         MatType matType=(MatType) MATMPIAIJ,
                         int numLocalRows=PETSC_DECIDE,
                         int numLocalColumns=PETSC_DECIDE,
                         int maxColsPerRowIfMatMpiAij=54 /* see doxygen comment! */);

    static void ReplicateException(bool flag);

//    static double GetVecValue(Vec vec, unsigned index)
//    {
//        assert(vec);
//        PetscInt size;
//        VecGetSize(vec, &size);
//        assert((int)index<size);
//
//        double *p_data;
//        VecGetArray(vec, &p_data);
//        double ret = p_data[(int)index];
//        VecRestoreArray(vec, &p_data);
//
//        return ret;
//    }

    static void DumpPetscObject(const Mat& rMat, const std::string& rOutputFileFullPath);

    static void DumpPetscObject(const Vec& rVec, const std::string& rOutputFileFullPath);

    static void ReadPetscObject(Mat& rMat, const std::string& rOutputFileFullPath);

    static void ReadPetscObject(Vec& rVec, const std::string& rOutputFileFullPath);

#endif //SPECIAL_SERIAL

};

#endif /*PETSCTOOLS_HPP_*/

---