SYNTAX

C Syntax

int MPI_Op_create(MPI_User_function* user_fn, int commute, MPI_Op*
    op)

int MPI_Op_create_c(MPI_User_function_c* user_fn, int commute,
    MPI_Op* op)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_OP_CREATE(USER_FN, COMMUTE, OP, IERROR)
    EXTERNAL USER_FN
    LOGICAL COMMUTE
    INTEGER OP, IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_Op_create(user_fn, commute, op, ierror)
    PROCEDURE(MPI_User_function) :: user_fn
    LOGICAL, INTENT(IN) :: commute
    TYPE(MPI_Op), INTENT(OUT) :: op
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror

MPI_Op_create_c(user_fn, commute, op, ierror)
    PROCEDURE(MPI_User_function_c) :: user_fn
    LOGICAL, INTENT(IN) :: commute
    TYPE(MPI_Op), INTENT(OUT) :: op
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror