DMGetGlobalVector#

Gets a PETSc vector that may be used with the DM global routines.

Synopsis#

#include "petscdm.h" 
PetscErrorCode DMGetGlobalVector(DM dm, Vec *g)

Collective on dm

Input Parameter#

dm - the DM

Output Parameter#

g - the global vector

Note#

The vector values are NOT initialized and may have garbage in them, so you may need to zero them.

The output parameter, g, is a regular PETSc vector that should be returned with DMRestoreGlobalVector() DO NOT call VecDestroy() on it.

This is intended to be used for vectors you need for a short time, like within a single function call. For vectors that you intend to keep around (for example in a C struct) or pass around large parts of your code you should use DMCreateGlobalVector().

VecStride*() operations can be useful when using DM with dof > 1