petsc-3.7.1 2016-05-15
DMCreateFieldDecomposition
Returns a list of IS objects defining a decomposition of a problem into subproblems corresponding to different fields: each IS contains the global indices of the dofs of the corresponding field. The optional list of DMs define the DM for each subproblem. Generalizes DMCreateFieldIS().
Synopsis
#include "petscdm.h"
#include "petscdmlabel.h"
PetscErrorCode DMCreateFieldDecomposition(DM dm, PetscInt *len, char ***namelist, IS **islist, DM **dmlist)
Not collective Many br
Input Parameter
dm -the DM object Many br
Output Parameters
| len | - The number of subproblems in the field decomposition (or NULL if not requested) Many br |
| namelist | - The name for each field (or NULL if not requested) Many br |
| islist | - The global indices for each field (or NULL if not requested) Many br |
| dmlist | - The DMs for each field subproblem (or NULL, if not requested; if NULL is returned, no DMs are defined) Many br |
Many br
Notes
The user is responsible for freeing all requested arrays. In particular, every entry of names should be freed with Many brPetscFree(), every entry of is should be destroyed with ISDestroy(), every entry of dm should be destroyed with DMDestroy(), Many brand all of the arrays should be freed with PetscFree(). Many br
See Also
DMDestroy(), DMView(), DMCreateInterpolation(), DMCreateColoring(), DMCreateMatrix(), DMCreateFieldIS()
Level:intermediate
Location:src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages