petsc-3.9.4 2018-09-11
ISLocalToGlobalMappingGetBlockInfo
Gets the neighbor information for each processor and each index shared by more than one processor
Synopsis
#include "petscis.h"
PetscErrorCode ISLocalToGlobalMappingGetBlockInfo(ISLocalToGlobalMapping mapping,PetscInt *nproc,PetscInt *procs[],PetscInt *numprocs[],PetscInt **indices[])
Collective on ISLocalToGlobalMapping
Input Parameters
mapping -the mapping from local to global indexing
Output Parameter
| nproc | - number of processors that are connected to this one
|
| proc | - neighboring processors
|
| numproc | - number of indices for each subdomain (processor)
|
| indices | - indices of nodes (in local numbering) shared with neighbors (sorted by global numbering)
|
Fortran Usage
ISLocalToGlobalMpngGetInfoSize(ISLocalToGlobalMapping,PetscInt nproc,PetscInt numprocmax,ierr) followed by
ISLocalToGlobalMappingGetInfo(ISLocalToGlobalMapping,PetscInt nproc, PetscInt procs[nproc],PetscInt numprocs[nproc],
PetscInt indices[nproc][numprocmax],ierr)
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
ISLocalToGlobalMappingDestroy(), ISLocalToGlobalMappingCreateIS(), ISLocalToGlobalMappingCreate(),
ISLocalToGlobalMappingRestoreInfo()
Level
advanced
Location
src/vec/is/utils/isltog.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages