petsc-3.5.4 2015-05-23

PetscObjectDereference

Indicates to any PetscObject that it is being referenced by one less PetscObject. This decreases the reference count for that object by one.

#include "petscsys.h"    
PetscErrorCode  PetscObjectDereference(PetscObject obj)

Collective on PetscObject if reference reaches 0 otherwise Logically Collective

obj -the PETSc object; this must be cast with (PetscObject), for example, PetscObjectDereference((PetscObject)mat);

Notes: PetscObjectDestroy(PetscObject *obj) sets the obj pointer to null after the call, this routine does not.