AbstractLinearPdeSolver.hpp

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*/
 
#ifndef ABSTRACTLINEARPDESOLVER_HPP_
#define ABSTRACTLINEARPDESOLVER_HPP_
 
#include "LinearSystem.hpp"
#include "BoundaryConditionsContainer.hpp"
#include "AbstractTetrahedralMesh.hpp"
#include "HeartEventHandler.hpp"
 
template<unsigned ELEMENT_DIM, unsigned SPACE_DIM, unsigned PROBLEM_DIM>
class AbstractLinearPdeSolver : private boost::noncopyable
{
protected:
 
    LinearSystem* mpLinearSystem;
 
    AbstractTetrahedralMesh<ELEMENT_DIM,SPACE_DIM>* mpMesh;
 
public:
 
    AbstractLinearPdeSolver(AbstractTetrahedralMesh<ELEMENT_DIM,SPACE_DIM>* pMesh)
        : mpLinearSystem(nullptr),
          mpMesh(pMesh)
    {
        assert(pMesh!=nullptr);
    }
 
    virtual ~AbstractLinearPdeSolver()
    {
        if (mpLinearSystem)
        {
            delete mpLinearSystem;
        }
    }
 
    virtual void InitialiseForSolve(Vec initialSolution = nullptr);
 
    virtual void PrepareForSetupLinearSystem(Vec currentSolution)
    {
    }
 
    virtual void FinaliseLinearSystem(Vec currentSolution)
    {
    }
 
    virtual void FollowingSolveLinearSystem(Vec currentSolution)
    {
    }
 
    virtual void SetupLinearSystem(Vec currentSolution, bool computeMatrix)=0;
 
    LinearSystem* GetLinearSystem()
    {
        return mpLinearSystem;
    }
};
 
template <unsigned ELEMENT_DIM, unsigned SPACE_DIM, unsigned PROBLEM_DIM>
void AbstractLinearPdeSolver<ELEMENT_DIM, SPACE_DIM, PROBLEM_DIM>::InitialiseForSolve(Vec initialSolution)
{
    if (this->mpLinearSystem == nullptr)
    {
        unsigned preallocation = PROBLEM_DIM * mpMesh->CalculateMaximumNodeConnectivityPerProcess();
 
        HeartEventHandler::BeginEvent(HeartEventHandler::COMMUNICATION);
        if (initialSolution == nullptr)
        {
            /*
             * Static problem, create linear system. The following ensures
             * all the unknowns for a particular node are on the same processor.
             */
            Vec template_vec = mpMesh->GetDistributedVectorFactory()->CreateVec(PROBLEM_DIM);
 
            this->mpLinearSystem = new LinearSystem(template_vec, preallocation);
 
            PetscTools::Destroy(template_vec);
        }
        else
        {
            /*
             * Use the current solution (ie the initial solution)
             * as the template in the alternative constructor of
             * LinearSystem. This is to avoid problems with VecScatter.
             */
            this->mpLinearSystem = new LinearSystem(initialSolution, preallocation);
        }
 
        HeartEventHandler::EndEvent(HeartEventHandler::COMMUNICATION);
    }
}
 
#endif /*ABSTRACTLINEARPDESOLVER_HPP_*/