Function decode_window 

pub fn decode_window<T: RudaPrimitive>(
    values: &SharedMemory<T>,
    ends: &SharedMemory<u64>,
    output: &mut Array<T>,
    relative_offsets: &mut Array<u64>,
    window_offset: u64,
    num_runs: usize,
    items_per_thread: usize,
)

Decode a blocked window, also returning each item’s offset within its run. Entries beyond the total decoded length are left unchanged.