Function mpi::ffi::PMPI_Fetch_and_op

pub unsafe extern fn PMPI_Fetch_and_op(origin_addr: *const c_void,
                                       result_addr: *mut c_void,
                                       datatype: MPI_Datatype,
                                       target_rank: c_int,
                                       target_disp: MPI_Aint,
                                       op: MPI_Op,
                                       win: MPI_Win)
                                       -> c_int