private E unlinkFirst()

in src/main/java/org/apache/commons/pool3/impl/LinkedBlockingDeque.java [1449:1468]

• 19 lines of code
• 3 McCabe index (conditional complexity)

    private E unlinkFirst() {
        // assert lock.isHeldByCurrentThread();
        final Node<E> f = first;
        if (f == null) {
            return null;
        }
        final Node<E> n = f.next;
        final E item = f.item;
        f.item = null;
        f.next = f; // help GC
        first = n;
        if (n == null) {
            last = null;
        } else {
            n.prev = null;
        }
        --count;
        notFull.signal();
        return item;
    }