Function ringbuf::move_items

pub fn move_items<T>(
    src: &mut Consumer<T>, 
    dst: &mut Producer<T>, 
    count: Option<usize>
) -> usize

Moves at most count items from the src consumer to the dst producer. Consumer and producer may be of different buffers as well as of the same one.

count is the number of items being moved, if None - as much as possible items will be moved.

Returns number of items been moved.