PetscObjectQueryFunction

Retrieve a function pointer that was previously composed onto a PetscObject with PetscObjectComposeFunction()

Synopsis

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

Logically Collective

Input Parameters

• obj - the PetscObject

• name - the string under which the function was composed

Output Parameter

• fptr - the address into which the function pointer is written; set to NULL if no function of this name is composed onto obj

Note

The macro casts fptr to the internal PetscErrorCodeFn ** representation before calling PetscObjectQueryFunction_Private() so that any function-pointer type can be supplied without an explicit cast.

See Also

PetscObjectComposeFunction(), PetscObjectHasFunction(), PetscObject

Level

advanced

Location

include/petscsys.h

Examples

src/mat/tutorials/ex8.c

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