DMCompositeGetAccessArray#

Allows one to access the individual packed vectors in their global representation.

Synopsis#

#include "petscdmcomposite.h"  
PetscErrorCode DMCompositeGetAccessArray(DM dm, Vec pvec, PetscInt nwanted, const PetscInt *wanted, Vec *vecs)

Collective

Input Parameters#

  • dm - the DMCOMPOSITE

  • pvec - packed vector

  • nwanted - number of vectors wanted

  • wanted - sorted array of vectors wanted, or NULL to get all vectors

Output Parameter#

  • vecs - array of requested global vectors (must be allocated)

Note#

Use DMCompositeRestoreAccessArray() to return the vectors when you no longer need them

See Also#

DMCOMPOSITE, DM, DMCompositeGetAccess(), DMCompositeGetEntries(), DMCompositeScatter(), DMCompositeGather()

Level#

advanced

Location#

src/dm/impls/composite/pack.c

Examples#

src/ts/utils/dmplexlandau/tutorials/ex2.c
src/ts/utils/dmplexlandau/tutorials/ex1.c

Index of all DM routines
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Index of all manual pages