DMGetApplicationContext#
Gets a user context from a DM object provided with DMSetApplicationContext()
Synopsis#
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMGetApplicationContext(DM dm, PeCtx ctx)
Not Collective
Input Parameter#
dm - the
DMobject
Output Parameter#
ctx - a pointer to the user context
Note#
A user context is a way to pass problem specific information that is accessible whenever the DM is available
Fortran Notes#
This only works when the context is a Fortran derived type (it cannot be a PetscObject) and you must write a Fortran interface definition for this
function that tells the Fortran compiler the derived data type that is returned as the ctx argument. For example,
Interface DMGetApplicationContext
Subroutine DMGetApplicationContext(dm,ctx,ierr)
#include <petsc/finclude/petscdm.h>
use petscdm
DM dm
type(tUsertype), pointer :: ctx
PetscErrorCode ierr
End Subroutine
End Interface DMGetApplicationContext
The prototype for ctx must be
type(tUsertype), pointer :: ctx
See Also#
DM Basics, DM, DMView(), DMCreateGlobalVector(), DMCreateInterpolation(), DMCreateColoring(), DMCreateMatrix(), DMCreateMassMatrix()
Level#
intermediate
Location#
Examples#
src/dm/tutorials/swarm_ex3.c
src/snes/tutorials/ex27.c
src/snes/tutorials/ex55.c
src/ksp/ksp/tutorials/ex73.c
src/snes/tutorials/ex48.c
src/snes/tutorials/ex18.c
src/ksp/ksp/tutorials/ex28.c
src/snes/tutorials/ex5.c
src/snes/tutorials/ex30.c
src/snes/tutorials/ex22.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages