Function mpi_sys::PMPI_Unpack

pub unsafe extern "C" fn PMPI_Unpack(
    inbuf: *const c_void, 
    insize: c_int, 
    position: *mut c_int, 
    outbuf: *mut c_void, 
    outcount: c_int, 
    datatype: MPI_Datatype, 
    comm: MPI_Comm
) -> c_int