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
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
See Also#
DM, DMCreateGlobalVector(), VecDuplicate(), VecDuplicateVecs(),
DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMGlobalToLocalBegin(),
DMGlobalToLocalEnd(), DMLocalToGlobalBegin(), DMCreateLocalVector(), DMRestoreLocalVector()
VecStrideMax(), VecStrideMin(), VecStrideNorm(), DMClearGlobalVectors(), DMGetNamedGlobalVector(), DMGetNamedLocalVector()
Level#
beginner
Location#
Examples#
src/dm/impls/plex/tutorials/ex7.c
src/dm/impls/stag/tutorials/ex4.c
src/dm/impls/plex/tutorials/ex1f90.F90
src/dm/impls/stag/tutorials/ex3.c
src/dm/tutorials/ex51.c
src/dm/tutorials/ex12.c
src/dm/tutorials/ex11f90.F90
src/dm/tutorials/ex14.c
src/dm/impls/stag/tutorials/ex1.c
src/dm/impls/stag/tutorials/ex2.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages