1: #pragma once

  3: #include <petsc/private/pcimpl.h>
  4: #include <petscksp.h>

  6: typedef struct {
  7:   PetscBool   init;    /* do only init step - error correction of direction is omitted */
  8:   PetscBool   correct; /* add CP (Qr) correction to descent direction */
  9:   PetscScalar correctfact;
 10:   PetscInt    reductionfact;
 11:   Mat         W, Wt, WtA, WtAW; /* deflation space, coarse problem mats */
 12:   KSP         WtAWinv;          /* deflation coarse problem */
 13:   KSPType     ksptype;
 14:   PC          pc; /* additional preconditioner */
 15:   Vec         work;
 16:   Vec        *workcoarse;
 17:   const char *prefix;

 19:   PCDeflationSpaceType spacetype;
 20:   PetscInt             spacesize;
 21:   PetscInt             lvl;
 22:   PetscInt             maxlvl;
 23:   PetscBool            extendsp;
 24: } PC_Deflation;

 26: PETSC_INTERN PetscErrorCode PCDeflationComputeSpace(PC);