#pragma once

#include <petsc/private/kspimpl.h> /*I "petscksp.h" I*/

typedef struct {
  PetscInt               mmax;      /* The maximum number vectors of each type to store */
  PetscInt               nprealloc; /* How many vectors to preallocate */
  PetscInt               nvecs;     /* How many vectors are actually stored */
  PetscInt               vecb;      /* How many vectors to allocate at a time in a chunk */
  Vec                   *pvecs, *svecs, *qvecs, *tvecs, **ppvecs, **psvecs, **pqvecs, **ptvecs, *qold, *pold, *sold, *told;
  PetscInt              *chunksizes; /* Chunk sizes allocated */
  PetscInt               nchunks;    /* Number of chunks */
  KSPFCDTruncationType   truncstrat;
  PetscInt               n_restarts;
  PetscScalar           *dots;
  PetscReal             *etas;
  Vec                   *redux;
  PetscBool              norm_breakdown; /* set if the recurred norm eta breaks down -> restart triggered */
  PetscBool              unroll_w;
  void                  *modifypc_ctx;     /* user defined data for the modifypc function */
  KSPFlexibleModifyPCFn *modifypc;         /* function to modify the preconditioner*/
  PetscCtxDestroyFn     *modifypc_destroy; /* function to destroy the user context for the modifypc function */
} KSP_PIPEGCR;