Function mpi_sys::PMPI_Ireduce

pub unsafe extern "C" fn PMPI_Ireduce(
    sendbuf: *const c_void, 
    recvbuf: *mut c_void, 
    count: c_int, 
    datatype: MPI_Datatype, 
    op: MPI_Op, 
    root: c_int, 
    comm: MPI_Comm, 
    request: *mut MPI_Request
) -> c_int