PetscSFGatherBegin#
begin pointwise gather of all leaves into multi-roots, to be completed with PetscSFGatherEnd()
Synopsis#
#include "petscsf.h" 
PetscErrorCode PetscSFGatherBegin(PetscSF sf, MPI_Datatype unit, const void *leafdata, void *multirootdata)
Collective
Input Parameters#
- sf - star forest 
- unit - data type 
- leafdata - leaf data to gather to roots 
Output Parameter#
- multirootdata - root buffer to gather into, amount of space per root is equal to its degree 
See Also#
Level#
intermediate
Location#
Examples#
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages