Function mpi_sys::MPIX_Grequest_start

pub unsafe extern "C" fn MPIX_Grequest_start(
    query_fn: MPI_Grequest_query_function, 
    free_fn: MPI_Grequest_free_function, 
    cancel_fn: MPI_Grequest_cancel_function, 
    poll_fn: MPIX_Grequest_poll_function, 
    wait_fn: MPIX_Grequest_wait_function, 
    extra_state: *mut c_void, 
    request: *mut MPI_Request
) -> c_int