petsc-3.10.5 2019-03-28
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# 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;

         ierr = PetscBagCreate(PETSC_COMM_WORLD,sizeof(MyParameters),&bag);

         ierr = PetscBagGetData(bag,(void **)&params);

         ierr = PetscBagSetName(bag,"MyParameters");

         ierr = PetscBagRegisterInt(bag,&params.height,22,"height","Height of the water tower");

### See Also

PetscBagSetName(), PetscBagGetName(), PetscBagView(), PetscBagLoad(), PetscBagGetData()
PetscBagRegisterReal(), PetscBagRegisterInt(), PetscBagRegisterBool(), PetscBagRegisterScalar() PetscBagSetFromOptions(), PetscBagRegisterVec(), PetscBagCreate(), PetscBagDestroy(), PetscBagRegisterEnum()

### Level

beginner

### Location

src/sys/classes/bag/../../../../include/petscbag.h
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages