petsc-master 2020-03-31
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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, SETERRQ(PetscObjectComm((PetscObject)mat,...);

Output Parameter

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

Notes

Never use this in the form
      comm = PetscObjectComm((PetscObject)obj); 
instead use PetscObjectGetComm()

See Also

PetscObjectGetComm()

Level

advanced

Location

src/sys/objects/gcomm.c

Examples

src/vec/vec/utils/tagger/tutorials/ex1.c.html
src/vec/is/sf/tutorials/ex1.c.html
src/mat/tutorials/ex8.c.html
src/dm/impls/plex/tutorials/ex5.c.html
src/dm/impls/plex/tutorials/ex6.c.html
src/dm/impls/plex/tutorials/ex7.c.html
src/dm/field/tutorials/ex1.c.html
src/ksp/ksp/tutorials/ex49.c.html
src/ksp/ksp/tutorials/ex59.c.html
src/ksp/ksp/tutorials/ex65.c.html
src/ksp/ksp/tutorials/ex73.c.html

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Index of all manual pages