ISLocalToGlobalMappingGetInfo#
Gets the neighbor information for each process
Synopsis#
#include "petscis.h"
PetscErrorCode ISLocalToGlobalMappingGetInfo(ISLocalToGlobalMapping mapping, PetscInt *nproc, PetscInt *procs[], PetscInt *numprocs[], PetscInt **indices[])
Collective the first time it is called
Input Parameter#
mapping - the mapping from local to global indexing
Output Parameters#
nproc - number of processes that are connected to the calling process
procs - neighboring processes
numprocs - number of indices for each process
indices - indices (in local numbering) shared with neighbors (sorted by global numbering)
Note#
The user needs to call ISLocalToGlobalMappingRestoreInfo() when the data is no longer needed.
Fortran Notes#
There is no ISLocalToGlobalMappingRestoreInfo() in Fortran. You must make sure that
procs[], numprocs[] and indices[][] are large enough arrays, either by allocating them
dynamically or defining static ones large enough.
See Also#
Low-level Vector Communication, ISLocalToGlobalMappingDestroy(), ISLocalToGlobalMappingCreateIS(), ISLocalToGlobalMappingCreate(),
ISLocalToGlobalMappingRestoreInfo(), ISLocalToGlobalMappingGetNodeInfo()
Level#
advanced
Location#
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages