/[escript]/trunk/paso/src/Solver.h
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Contents of /trunk/paso/src/Solver.h

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Revision 155 - (show annotations)
Wed Nov 9 02:02:19 2005 UTC (14 years ago) by jgs
Original Path: trunk/paso/src/Solvers/Solver.h
File MIME type: text/plain
File size: 2605 byte(s)
move all directories from trunk/esys2 into trunk and remove esys2

1 /* $Id$ */
2
3 #ifndef INC_SOLVER
4 #define INC_SOLVER
5
6 #include "SystemMatrix.h"
7
8 #define FINLEY_SOLVER_TRACE
9 /* error codes used in the solver */
10 #define SOLVER_NO_ERROR 0
11 #define SOLVER_MAXITER_REACHED 1
12 #define SOLVER_INPUT_ERROR -1
13 #define SOLVER_MEMORY_ERROR -9
14 #define SOLVER_BREAKDOWN -10
15
16 static double ONE=1.;
17 static double ZERO=0.;
18 static double TOLERANCE_FOR_SCALARS=0.;
19
20 /* ILU preconditioner */
21 struct Paso_Solver_ILU {
22 dim_t n;
23 dim_t n_block;
24 dim_t n_F;
25 dim_t n_C;
26 double* inv_A_FF;
27 index_t* A_FF_pivot;
28 Paso_SystemMatrix * A_FC;
29 Paso_SystemMatrix * A_CF;
30 index_t* rows_in_F;
31 index_t* rows_in_C;
32 index_t* mask_F;
33 index_t* mask_C;
34 double* x_F;
35 double* b_F;
36 double* x_C;
37 double* b_C;
38 struct Paso_Solver_ILU * ILU_of_Schur;
39 };
40 typedef struct Paso_Solver_ILU Paso_Solver_ILU;
41
42
43 /* jacobi preconditioner */
44
45 typedef struct Paso_Solver_Jacobi {
46 dim_t n_block;
47 dim_t n;
48 double* values;
49 index_t* pivot;
50 } Paso_Solver_Jacobi;
51
52 /* general preconditioner interface */
53
54 typedef struct Paso_Solver_Preconditioner {
55 dim_t type;
56 /* jacobi preconditioner */
57 Paso_Solver_Jacobi* jacobi;
58 /* ilu preconditioner */
59 Paso_Solver_ILU* ilu;
60 } Paso_Solver_Preconditioner;
61
62 void Paso_Solver(Paso_SystemMatrix*,double*,double*,Paso_Options*);
63 void Paso_Solver_free(Paso_SystemMatrix*);
64 err_t Paso_Solver_BiCGStab( Paso_SystemMatrix * A, double* B, double * X, dim_t *iter, double * tolerance);
65 err_t Paso_Solver_PCG( Paso_SystemMatrix * A, double* B, double * X, dim_t *iter, double * tolerance);
66 err_t Paso_Solver_GMRES(Paso_SystemMatrix * A, double * r, double * x, dim_t *num_iter, double * tolerance,dim_t length_of_recursion,dim_t restart);
67 void Paso_Preconditioner_free(Paso_Solver_Preconditioner*);
68 void Paso_Solver_setPreconditioner(Paso_SystemMatrix* A,Paso_Options* options);
69 void Paso_Solver_solvePreconditioner(Paso_SystemMatrix* A,double*,double*);
70 void Paso_Solver_applyBlockDiagonalMatrix(dim_t n_block,dim_t n,double* D,index_t* pivot,double* x,double* b);
71 void Paso_Solver_ILU_free(Paso_Solver_ILU * in);
72 Paso_Solver_ILU* Paso_Solver_getILU(Paso_SystemMatrix * A_p,bool_t verbose);
73 void Paso_Solver_solveILU(Paso_Solver_ILU * ilu, double * x, double * b);
74 void Paso_Solver_updateIncompleteSchurComplement(Paso_SystemMatrix* A_CC,Paso_SystemMatrix *A_CF,double* invA_FF,index_t* A_FF_pivot,Paso_SystemMatrix *A_FC);
75 Paso_Solver_Jacobi* Paso_Solver_getJacobi(Paso_SystemMatrix * A_p);
76 void Paso_Solver_solveJacobi(Paso_Solver_Jacobi * prec, double * x, double * b);
77 void Paso_Solver_Jacobi_free(Paso_Solver_Jacobi * in);
78
79 #endif /* #ifndef INC_SOLVER */

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