ISGetBlockSize#

Returns the number of elements in a block.

Synopsis#

#include "petscis.h"
PetscErrorCode ISGetBlockSize(IS is, PetscInt *size)


Not Collective

Input Parameter#

• is - the index set

Output Parameter#

• size - the number of elements in a block

Notes#

This is much like the block size for Vecs. It indicates that one can think of the indices as being in a collection of equal size blocks. For ISBlock() these collections of blocks are all contiquous within a block but this is not the case for other IS. ISBlockGetIndices() only works for ISBlock IS, not others.

ISBlockGetSize(), ISGetSize(), ISCreateBlock(), ISSetBlockSize()

intermediate

Location#

src/vec/is/is/interface/index.c

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