/*D
   MPI_Op_commutative - Queries an MPI reduction operation for its commutativity

Synopsis:
.vb
int MPI_Op_commutative(MPI_Op op, int *commute)
.ve

Input Parameters:
. op - operation (handle)

Output Parameters:
. commute - true if op is commutative, false otherwise (logical)

.N NULL

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_OP
.N MPI_ERR_OTHER

D*/

