PetscOptionsSetValue#
Sets an option name-value pair in the options database, overriding whatever is already present.
Synopsis#
#include "petscsys.h"
PetscErrorCode PetscOptionsSetValue(PetscOptions options, const char name[], const char value[])
Logically Collective
Input Parameters#
options - options database, use
NULL
for the default global databasename - name of option, this SHOULD have the - prepended
value - the option value (not used for all options, so can be
NULL
)
Note#
This function can be called BEFORE PetscInitialize()
The collectivity of this routine is complex; only the MPI processes that call this routine will have the affect of these options. If some processes that create objects call this routine and others do not the code may fail in complicated ways because the same parallel solvers may incorrectly use different options on different ranks.
Developer Note#
Uses malloc()
directly because PETSc may not be initialized yet.
See Also#
Level#
intermediate
Location#
Examples#
src/vec/vec/tutorials/ex5f.F90
src/vec/vec/tutorials/ex5.c
src/vec/vec/tutorials/ex10.c
src/snes/tutorials/ex30.c
src/sys/tutorials/ex20.c
src/tao/unconstrained/tutorials/rosenbrock1.c
src/tao/unconstrained/tutorials/eptorsion3.c
src/sys/tutorials/ex16f.F90
src/ksp/ksp/tutorials/ex76.c
src/tao/unconstrained/tutorials/eptorsion1.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages