2: /*
  3:     Provides a PETSc interface to SUNDIALS. Alan Hindmarsh's parallel ODE
  4:    solver developed at LLNL.
  5: */


 10:  #include <petsc/private/tsimpl.h>
 11:  #include <petsc/private/pcimpl.h>
 12:  #include <petsc/private/matimpl.h>

 14: /*
 15:    Include files specific for SUNDIALS
 16: */
 17: #if defined(PETSC_HAVE_SUNDIALS)

 19: EXTERN_C_BEGIN
 20: #include <cvode/cvode.h>                  /* prototypes for CVODE fcts. */
 21: #include <cvode/cvode_spgmr.h>            /* prototypes and constants for CVSPGMR solver */
 22: #include <nvector/nvector_parallel.h>     /* definition N_Vector and macro NV_DATA_P  */
 23: EXTERN_C_END

 25: typedef struct {
 26:   Vec update;           /* work vector where new solution is formed */
 27:   Vec ydot;             /* work vector the time derivative is stored */
 28:   Vec w1,w2;            /* work space vectors for function evaluation */

 30:   /* PETSc peconditioner objects used by SUNDIALS */
 31:   PetscInt                  cvode_type;   /* the SUNDIALS method, BDF or ADAMS  */
 32:   TSSundialsGramSchmidtType gtype;
 33:   PetscReal                 linear_tol;
 34:   PetscReal                 mindt,maxdt;

 36:   /* Variables used by Sundials */
 37:   MPI_Comm  comm_sundials;
 38:   double    reltol;
 39:   double    abstol;          /* only for using SS flag in SUNDIALS */
 40:   N_Vector  y;               /* current solution */
 41:   void      *mem;
 42:   PetscBool monitorstep;     /* flag for monitor internal steps; itask=V_ONE_STEP or itask=CV_NORMAL*/
 43:   PetscInt  maxl;            /* max dimension of the Krylov subspace to be used */
 44: } TS_Sundials;
 45: #endif

 47: #endif