pub unsafe extern "C" fn MPI_Scatterv(
sendbuf: *const c_void,
sendcounts: *const c_int,
displs: *const c_int,
sendtype: MPI_Datatype,
recvbuf: *mut c_void,
recvcount: c_int,
recvtype: MPI_Datatype,
root: c_int,
comm: MPI_Comm,
) -> c_int