PetscObjectComposeFunction#

Associates a function with a given PETSc object.

Synopsis#

#include <petscsys.h>
PetscErrorCode PetscObjectComposeFunction(PetscObject obj, const char name[], void (*fptr)(void))

Logically Collective

Input Parameters#

Notes#

When the first argument of fptr is (or is derived from) a PetscObject then PetscTryMethod() and PetscUseMethod() can be used to call the function directly with error checking.

To remove a registered routine, pass in NULL for fptr.

PetscObjectComposeFunction() can be used with any PETSc object (such as Mat, Vec, KSP, SNES, etc.) or any user-provided object.

PetscUseTypeMethod() and PetscTryTypeMethod() are used to call a function that is stored in the objects obj->ops table.

See Also#

PetscObjectQueryFunction(), PetscContainerCreate() PetscObjectCompose(), PetscObjectQuery(), PetscTryMethod(), PetscUseMethod(), PetscUseTypeMethod(), PetscTryTypeMethod(), PetscObject

Level#

advanced

Location#

src/sys/objects/inherit.c

Examples#

src/ksp/ksp/tutorials/ex73.c
src/mat/tutorials/ex8.c


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