#include "petscis.h" PetscErrorCode PetscSFSetGraphLayout(PetscSF sf,PetscLayout layout,PetscInt nleaves,const PetscInt *ilocal,PetscCopyMode localmode,const PetscInt *iremote)Collective
| sf | - star forest | |
| layout | - PetscLayout defining the global space | |
| nleaves | - number of leaf vertices on the current process, each of these references a root on any process | |
| ilocal | - locations of leaves in leafdata buffers, pass NULL for contiguous storage | |
| localmode | - copy mode for ilocal | |
| iremote | - remote locations of root vertices for each leaf on the current process |
Developers Note: Local indices which are the identity permutation in the range [0,nleaves) are discarded as they encode contiguous storage. In such case, if localmode is PETSC_OWN_POINTER, the memory is deallocated as it is not needed