:ref:`MPI_Op_commutative` |mdash| Query of commutativity of reduction operation.
#include <mpi.h>
int MPI_Op_commutative(MPI_Op op, int *commute)
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_OP_COMMUTATIVE(OP, COMMUTE, IERROR)
LOGICAL COMMUTE
INTEGER OP, IERROR
USE mpi_f08
MPI_Op_commutative(op, commute, ierror)
TYPE(MPI_Op), INTENT(IN) :: op
INTEGER, INTENT(OUT) :: commute
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
op
: Operation (handle).
commute
: True if op is commutative, false otherwise (logical).ierror
: Fortran only: Error status (integer).
Reduction operations can be queried for their commutativity.
.. seealso::
* :ref:`MPI_Op_create`