petsc-3.10.5 2019-03-28
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# PetscBagCreate

Create a bag of values

### Synopsis

    #include "petscbag.h"
    PetscErrorCode PetscBagCreate(MPI_Comm comm, size_t bagsize, PetscBag *bag)

Collective on MPI_Comm

### Input Parameters

| comm | - communicator to share bag
| bagsize | - size of the C structure holding the values

### Output Parameter

bag -the bag of values

### Notes

The size of the A struct must be small enough to fit in a PetscInt; by default PetscInt is 4 bytes; this means a bag cannot be larger than 2 gigabytes in length. The warning about casting to a shorter length can be ignored below unless your A struct is too large

### See Also

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

### Level

Intermediate

### Location

src/sys/classes/bag/bag.c

### Examples

src/sys/examples/tutorials/ex5.c.html
src/sys/examples/tutorials/ex5f90.F90.html
src/dm/examples/tutorials/ex7.c.html
Index of all Sys routines
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Index of all manual pages