IFPACK Development
ifp_brelax.h
00001 /*@HEADER
00002 // ***********************************************************************
00003 // 
00004 //       Ifpack: Object-Oriented Algebraic Preconditioner Package
00005 //                 Copyright (2002) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 //@HEADER
00028 */
00029 
00030 #ifndef _IFP_BRELAX_H_
00031 #define _IFP_BRELAX_H_
00032 
00033 #include "Ifpack_config.h"
00034 
00035 #include "ifp_GlobalPrecon.h"
00036 
00037 class ifp_LocalMat;
00038 class ifp_BlockMat;
00039 
00040 class IFPACK_DEPRECATED ifp_None : public ifp_GlobalPrecon
00041 {
00042 public:
00043     void setup(const ifp_BlockMat&) {};
00044     void apply (int nr, int nc, const double *u, int ldu, double *v, int ldv);
00045 };
00046 
00047 class IFPACK_DEPRECATED ifp_BJacobi : public ifp_GlobalPrecon
00048 {
00049 private:
00050     const ifp_BlockMat *Ap;
00051     ifp_LocalMat **diag;  // inverse or factors of diagonal blocks
00052 
00053 public:
00054     ifp_BJacobi();
00055    ~ifp_BJacobi();
00056  
00057     void setup(const ifp_BlockMat& A);
00058     void apply (int, int, const double *, int, double *, int);
00059     double condest();
00060 };
00061 
00062 class IFPACK_DEPRECATED ifp_BSOR_Base : public ifp_GlobalPrecon
00063 {
00064 protected:
00065     const ifp_BlockMat *Ap;
00066     ifp_LocalMat **diag;  // inverse or factors of diagonal blocks
00067     int    *idiag;
00068 
00069     double omega_;
00070     int iterations_;
00071 
00072 public:
00073     ifp_BSOR_Base();
00074     virtual ~ifp_BSOR_Base();
00075  
00076     double& omega() {return omega_;}
00077     int& iterations() {return iterations_;}
00078 
00079     void setup(const ifp_BlockMat& A, double omega = 1.0, int iterations = 1);
00080 };
00081 
00082 class IFPACK_DEPRECATED ifp_BSOR : public ifp_BSOR_Base
00083 {
00084 public:
00085     ifp_BSOR() {};
00086    ~ifp_BSOR() {};
00087     void apply (int, int, const double *, int, double *, int);
00088 };
00089 
00090 class IFPACK_DEPRECATED ifp_BSSOR : public ifp_BSOR_Base
00091 {
00092 public:
00093     ifp_BSSOR() {};
00094    ~ifp_BSSOR() {};
00095     void apply (int, int, const double *, int, double *, int);
00096 };
00097 
00098 #endif // _IFP_BRELAX_H_
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