2: #ifndef _PCIMPL_H
  3: #define _PCIMPL_H

  5: #include <petscksp.h>
  6: #include <petscpc.h>
  7: #include <petsc-private/petscimpl.h>

  9: typedef struct _PCOps *PCOps;
 10: struct _PCOps {
 11:   PetscErrorCode (*setup)(PC);
 12:   PetscErrorCode (*apply)(PC,Vec,Vec);
 13:   PetscErrorCode (*applyrichardson)(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt,PetscBool ,PetscInt*,PCRichardsonConvergedReason*);
 14:   PetscErrorCode (*applyBA)(PC,PCSide,Vec,Vec,Vec);
 15:   PetscErrorCode (*applytranspose)(PC,Vec,Vec);
 16:   PetscErrorCode (*applyBAtranspose)(PC,PetscInt,Vec,Vec,Vec);
 17:   PetscErrorCode (*setfromoptions)(PC);
 18:   PetscErrorCode (*presolve)(PC,KSP,Vec,Vec);
 19:   PetscErrorCode (*postsolve)(PC,KSP,Vec,Vec);
 20:   PetscErrorCode (*getfactoredmatrix)(PC,Mat*);
 21:   PetscErrorCode (*applysymmetricleft)(PC,Vec,Vec);
 22:   PetscErrorCode (*applysymmetricright)(PC,Vec,Vec);
 23:   PetscErrorCode (*setuponblocks)(PC);
 24:   PetscErrorCode (*destroy)(PC);
 25:   PetscErrorCode (*view)(PC,PetscViewer);
 26:   PetscErrorCode (*reset)(PC);
 27:   PetscErrorCode (*load)(PC,PetscViewer);
 28: };

 30: /*
 31:    Preconditioner context
 32: */
 33: struct _p_PC {
 34:   PETSCHEADER(struct _PCOps);
 35:   DM               dm;
 36:   PetscInt         setupcalled;
 37:   PetscObjectState matstate,matnonzerostate;          /* last known nonzero state of the pmat associated with this PC */
 38:   PetscBool        reusepreconditioner;
 39:   MatStructure     flag;                              /* reset each PCSetUp() to indicate to PC implementations if nonzero structure has changed */

 41:   PetscInt         setfromoptionscalled;

 43:   Mat              mat,pmat;
 44:   Vec              diagonalscaleright,diagonalscaleleft; /* used for time integration scaling */
 45:   PetscBool        diagonalscale;
 46:   PetscBool        nonzero_guess; /* used by PCKSP, PCREDUNDANT */
 47:   PetscBool        useAmat; /* used by several PC that including applying the operator inside the preconditioner */
 48:   PetscErrorCode   (*modifysubmatrices)(PC,PetscInt,const IS[],const IS[],Mat[],void*); /* user provided routine */
 49:   void             *modifysubmatricesP; /* context for user routine */
 50:   void             *data;
 51:   PetscInt         presolvedone;  /* has PCPreSolve() already been run */
 52:   void             *user;             /* optional user-defined context */
 53: };

 55: PETSC_EXTERN PetscLogEvent PC_SetUp, PC_SetUpOnBlocks, PC_Apply, PC_ApplyCoarse, PC_ApplyMultiple, PC_ApplySymmetricLeft;
 56: PETSC_EXTERN PetscLogEvent PC_ApplySymmetricRight, PC_ModifySubMatrices, PC_ApplyOnBlocks, PC_ApplyTransposeOnBlocks, PC_ApplyOnMproc;

 58: #endif