PETSc version 3.15.5
DMForestSetAdaptivityPurpose
During the pre-setup phase, set whether the current DM is being adapted from its source (set with DMForestSetAdaptivityForest()) for the purpose of refinement (DM_ADAPT_REFINE), coarsening (DM_ADAPT_COARSEN), or undefined (DM_ADAPT_DETERMINE).  This only matters for the purposes of reference counting: during DMDestroy(), cyclic references can be found between DMs only if the cyclic reference is due to a fine/coarse relationship (see DMSetFineDM()/DMSetCoarseDM()).  If the purpose is not refinement or coarsening, and the user does not maintain a reference to the post-adaptation forest (i.e., the one created by DMForestTemplate()), then this can cause a memory leak.  This method is used by subtypes of DMForest when automatically constructing mesh hierarchies. 
Synopsis
#include "petscdmforest.h" 
#include "petscdm.h" 
#include "petscdmlabel.h" 
PetscErrorCode DMForestSetAdaptivityPurpose(DM dm, DMAdaptFlag purpose)
Logically collective on dm
Input Parameters
|  | dm | - the forest | 
|  | purpose | - the adaptivity purpose | 
See Also
 DMForestTemplate(), DMForestSetAdaptivityForest(), DMForestGetAdaptivityForest(), DMAdaptFlag
Level
advanced
Location
src/dm/impls/forest/forest.c
Index of all DMFOREST routines
Table of Contents for all manual pages
Index of all manual pages