PCLDUFactorisation.hpp

00001 /*
00002 
00003 Copyright (C) University of Oxford, 2005-2010
00004 
00005 University of Oxford means the Chancellor, Masters and Scholars of the
00006 University of Oxford, having an administrative office at Wellington
00007 Square, Oxford OX1 2JD, UK.
00008 
00009 This file is part of Chaste.
00010 
00011 Chaste is free software: you can redistribute it and/or modify it
00012 under the terms of the GNU Lesser General Public License as published
00013 by the Free Software Foundation, either version 2.1 of the License, or
00014 (at your option) any later version.
00015 
00016 Chaste is distributed in the hope that it will be useful, but WITHOUT
00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00018 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
00019 License for more details. The offer of Chaste under the terms of the
00020 License is subject to the License being interpreted in accordance with
00021 English Law and subject to any action against the University of Oxford
00022 being under the jurisdiction of the English Courts.
00023 
00024 You should have received a copy of the GNU Lesser General Public License
00025 along with Chaste. If not, see <http://www.gnu.org/licenses/>.
00026 
00027 */
00028 
00029 
00030 #ifndef PCLDUFACTORISATION_HPP_
00031 #define PCLDUFACTORISATION_HPP_
00032 
00033 #include <cassert>
00034 #include <petscvec.h>
00035 #include <petscmat.h>
00036 #include <petscksp.h>
00037 #include <petscpc.h>
00038 #include "PetscTools.hpp"
00039 
00050 #if (PETSC_VERSION_MAJOR == 3 && PETSC_VERSION_MINOR == 1) //PETSc 3.1
00051 PetscErrorCode PCLDUFactorisationApply(PC pc_object, Vec x, Vec y);
00052 #else
00053 PetscErrorCode PCLDUFactorisationApply(void* pc_context, Vec x, Vec y);
00054 #endif
00055 
00102 class PCLDUFactorisation
00103 {
00104 public:
00108     typedef struct{
00109         Mat A11_matrix_subblock; 
00110         Mat A22_matrix_subblock; 
00111         Mat B_matrix_subblock; 
00112         PC  PC_amg_A11; 
00113         PC  PC_amg_A22; 
00114         Vec x1_subvector;
00115         Vec x2_subvector;
00116         Vec y1_subvector;
00117         Vec y2_subvector;
00118         Vec z;
00119         Vec temp;
00120         VecScatter A11_scatter_ctx;
00121         VecScatter A22_scatter_ctx;
00122     } PCLDUFactorisationContext;
00123 
00124     PCLDUFactorisationContext mPCContext; 
00125     PC mPetscPCObject;
00127 public:
00128 
00134     PCLDUFactorisation(KSP& rKspObject);
00135 
00136     ~PCLDUFactorisation();
00137 
00138 private:
00144     void PCLDUFactorisationCreate(KSP& rKspObject);
00145 
00149     void PCLDUFactorisationSetUp();
00150 };
00151 #endif /*PCLDUFACTORISATION_HPP_*/

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