PetscObjectComm

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

Synopsis

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

Not Collective, No Fortran Support

Input Parameter

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

Note

Returns the MPI communicator or MPI_COMM_NULL if obj is not valid.

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/snes/tutorials/ex27.c
src/dm/impls/plex/tutorials/ex11.c
src/dm/impls/stag/tutorials/ex6.c
src/snes/tutorials/ex63.c
src/snes/tutorials/ex76.c
src/snes/tutorials/ex17.c
src/mat/tutorials/ex8.c
src/tao/tutorials/ex4.c
src/snes/tutorials/ex42.c
src/dm/impls/stag/tutorials/ex4.c

---

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages