DMCompositeGetGlobalISs#

Gets the index sets for each composed object in a DMCOMPOSITE

Synopsis#

#include "petscdmcomposite.h"  
PetscErrorCode DMCompositeGetGlobalISs(DM dm, IS *is[])

Collective

Input Parameter#

Output Parameter#

  • is - the array of index sets

Notes#

The is entries should be destroyed with ISDestroy(), the is array should be freed with PetscFree()

These could be used to extract a subset of vector entries for a “multi-physics” preconditioner

Use DMCompositeGetLocalISs() for index sets in the packed local numbering, and DMCompositeGetISLocalToGlobalMappings() for to map local sub-DM (including ghost) indices to packed global indices.

Fortran Notes#

The output argument ‘is’ must be an allocated array of sufficient length, which can be learned using DMCompositeGetNumberDM().

See Also#

DMCOMPOSITE, DM, DMDestroy(), DMCompositeAddDM(), DMCreateGlobalVector(), DMCompositeGather(), DMCompositeCreate(), DMCompositeGetAccess(), DMCompositeScatter(), DMCompositeGetLocalVectors(), DMCompositeRestoreLocalVectors(), DMCompositeGetEntries()

Level#

advanced

Location#

src/dm/impls/composite/pack.c

Examples#

src/snes/tutorials/ex28.c

Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages