PreconditionerDiagonal.h

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///////////////////////////////////////////////////////////////////////////////
//
// File: PreconditionerDiagonal.h
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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//
// Description: PreconditionerDiagonal header
//
///////////////////////////////////////////////////////////////////////////////
#ifndef NEKTAR_LIB_MULTIREGIONS_PRECONDITIONERDIAGONAL_H
#define NEKTAR_LIB_MULTIREGIONS_PRECONDITIONERDIAGONAL_H
#include <MultiRegions/AssemblyMap/AssemblyMapCG.h>
#include <MultiRegions/GlobalLinSys.h>
#include <MultiRegions/MultiRegionsDeclspec.h>
#include <MultiRegions/Preconditioner.h>
 
namespace Nektar
{
namespace MultiRegions
{
class PreconditionerDiagonal;
typedef std::shared_ptr<PreconditionerDiagonal> PreconditionerDiagonalSharedPtr;
 
class PreconditionerDiagonal : public Preconditioner
{
public:
    /// Creates an instance of this class
    static PreconditionerSharedPtr create(
        const std::shared_ptr<GlobalLinSys> &plinsys,
        const std::shared_ptr<AssemblyMap> &pLocToGloMap)
    {
        PreconditionerSharedPtr p =
            MemoryManager<PreconditionerDiagonal>::AllocateSharedPtr(
                plinsys, pLocToGloMap);
        p->InitObject();
        return p;
    }
 
    /// Name of class
    static std::string className;
    // static std::string className1;
 
    MULTI_REGIONS_EXPORT PreconditionerDiagonal(
        const std::shared_ptr<GlobalLinSys> &plinsys,
        const AssemblyMapSharedPtr &pLocToGloMap);
 
    MULTI_REGIONS_EXPORT
    virtual ~PreconditionerDiagonal()
    {
    }
 
protected:
    Array<OneD, NekDouble> m_diagonals;
 
    virtual void v_InitObject() override;
 
    virtual void v_DoPreconditioner(const Array<OneD, NekDouble> &pInput,
                                    Array<OneD, NekDouble> &pOutput,
                                    const bool &IsLocal = false) override;
 
    virtual void v_BuildPreconditioner() override;
 
private:
    void DiagonalPreconditionerSum(void);
 
    void StaticCondDiagonalPreconditionerSum(void);
 
    static std::string lookupIds[];
    static std::string def;
};
 
class PreconditionerNull;
typedef std::shared_ptr<PreconditionerNull> PreconditionerNullSharedPtr;
 
class PreconditionerNull : public Preconditioner
{
public:
    /// Creates an instance of this class
    static PreconditionerSharedPtr create(
        const std::shared_ptr<GlobalLinSys> &plinsys,
        const std::shared_ptr<AssemblyMap> &pLocToGloMap)
    {
        PreconditionerSharedPtr p =
            MemoryManager<PreconditionerNull>::AllocateSharedPtr(plinsys,
                                                                 pLocToGloMap);
        p->InitObject();
        return p;
    }
 
    /// Name of class
    static std::string className;
 
    MULTI_REGIONS_EXPORT PreconditionerNull(
        const std::shared_ptr<GlobalLinSys> &plinsys,
        const AssemblyMapSharedPtr &pLocToGloMap);
 
    MULTI_REGIONS_EXPORT
    virtual ~PreconditionerNull()
    {
    }
 
    virtual void v_InitObject() override;
 
    virtual void v_DoPreconditioner(const Array<OneD, NekDouble> &pInput,
                                    Array<OneD, NekDouble> &pOutput,
                                    const bool &isLocal = false) override;
 
    virtual void v_BuildPreconditioner() override;
 
private:
    static std::string lookupIds[];
    static std::string def;
};
 
class PreconditionerJacobi;
typedef std::shared_ptr<PreconditionerJacobi> PreconditionerJacobiSharedPtr;
 
class PreconditionerJacobi : public PreconditionerDiagonal
{
public:
    /// Creates an instance of this class
    static PreconditionerSharedPtr create(
        const std::shared_ptr<GlobalLinSys> &plinsys,
        const std::shared_ptr<AssemblyMap> &pLocToGloMap)
    {
        PreconditionerSharedPtr p =
            MemoryManager<PreconditionerJacobi>::AllocateSharedPtr(
                plinsys, pLocToGloMap);
        p->InitObject();
        return p;
    }
 
    /// Name of class
    static std::string className;
    // static std::string className1;
 
    MULTI_REGIONS_EXPORT PreconditionerJacobi(
        const std::shared_ptr<GlobalLinSys> &plinsys,
        const AssemblyMapSharedPtr &pLocToGloMap);
 
    MULTI_REGIONS_EXPORT
    virtual ~PreconditionerJacobi()
    {
    }
 
protected:
    virtual void v_InitObject() override;
 
    virtual void v_BuildPreconditioner() override;
 
    virtual void v_DoPreconditioner(const Array<OneD, NekDouble> &pInput,
                                    Array<OneD, NekDouble> &pOutput,
                                    const bool &IsLocal = false) override;
 
private:
    int m_niter;
 
    static std::string lookupIds[];
    static std::string def;
};
 
} // namespace MultiRegions
} // namespace Nektar
 
#endif