Get 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), coarsening only the last level (DM_ADAPT_COARSEN_LAST) 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.
PetscErrorCode DMForestGetAdaptivityPurpose(DM dm, DMAdaptFlag *purpose)
|purpose ||- the adaptivity purpose
DMForestTemplate(), DMForestSetAdaptivityForest(), DMForestGetAdaptivityForest(), DMAdaptFlag
Index of all DMFOREST routines
Table of Contents for all manual pages
Index of all manual pages