:ref:`MPI_Op_free` |mdash| Frees a user-defined combination function handle.
#include <mpi.h>
int MPI_Op_free(MPI_Op *op)
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_OP_FREE(OP, IERROR)
INTEGER OP, IERROR
USE mpi_f08
MPI_Op_free(op, ierror)
TYPE(MPI_Op), INTENT(INOUT) :: op
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
op
: Operation (handle).
ierror
: Fortran only: Error status (integer).
Marks a user-defined reduction operation for deallocation and sets op to MPI_OP_NULL.
.. seealso::
* :ref:`MPI_Op_create`
* :ref:`MPI_Reduce`
* :ref:`MPI_Allreduce`
* :ref:`MPI_Reduce_scatter`
* :ref:`MPI_Scan`