/** {@inheritDoc} */
@Override
protected Collection<E> dequeue0(int cnt) {
WindowHolder tup = ref.get();
AtomicInteger size = tup.size();
Collection<T> evts = tup.collection();
Collection<E> resCol = new ArrayList<>(cnt);
while (true) {
int curSize = size.get();
if (curSize > 0) {
if (size.compareAndSet(curSize, curSize - 1)) {
E res = pollInternal(evts, tup.set());
if (res != null) {
resCol.add(res);
if (resCol.size() >= cnt) return resCol;
} else {
size.incrementAndGet();
return resCol;
}
}
} else return resCol;
}
}
/** {@inheritDoc} */
@Override
protected Collection<E> pollEvicted0(int cnt) {
Collection<E> res = new ArrayList<>(cnt);
for (int i = 0; i < cnt; i++) {
E evicted = pollEvictedInternal();
if (evicted == null) return res;
res.add(evicted);
}
return res;
}