PetscObjectComm#

Gets the MPI communicator for any PetscObject regardless of the type.

Synopsis#

#include "petscsys.h"    
MPI_Comm PetscObjectComm(PetscObject obj)

Not Collective

Input Parameter#

obj - any PETSc object, for example a Vec, Mat or KSP. Thus must be cast with a (PetscObject), for example, PetscObjectComm((PetscObject)mat,…);

Output Parameter#

comm - the MPI communicator or MPI_COMM_NULL if obj is not valid

Note#

This is one of the rare PETSc routines that does not return an error code. Use PetscObjectGetComm() when appropriate for error handling.

See Also#

PetscObject, PetscObjectGetComm()

Level#

advanced

Location#

src/sys/objects/gcomm.c

Examples#

src/dm/field/tutorials/ex1.c
src/dm/impls/plex/tutorials/ex10.c
src/dm/impls/plex/tutorials/ex11.c
src/dm/impls/plex/tutorials/ex6.c
src/dm/impls/plex/tutorials/ex7.c
src/dm/impls/stag/tutorials/ex2.c
src/dm/impls/stag/tutorials/ex3.c
src/dm/impls/stag/tutorials/ex4.c
src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex8.c
src/dm/label/tutorials/ex1.c

Index of all Sys routines
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Index of all manual pages