PetscBag#

PETSc object that manages a collection of user data including parameters. A bag is essentially a C struct with serialization (you can save it and load it from files).

Synopsis#

typedef struct _n_PetscBag     *PetscBag;

Sample Usage#

      typedef struct {
         PetscInt     height;
         PetscScalar  root;
         PetscReal    byebye;
      } MyParameters;

      PetscBag     bag;
      MyParameters *params;

      PetscCall(PetscBagCreate(PETSC_COMM_WORLD,sizeof(MyParameters),&bag));
      PetscCall(PetscBagGetData(bag,(void **)&params));
      PetscCall(PetscBagSetName(bag,"MyParameters"));
      PetscCall(PetscBagRegisterInt(bag,&params.height,22,"height","Height of the water tower"));