Method bottom

src/butil/containers/bounded_queue.h:237–239

Get address of bottom-most item, NULL if queue is empty

    // Get address of bottom-most item, NULL if queue is empty
    T* bottom() { 
        return _count ? ((T*)_items + _mod(_start + _count - 1, _cap)) : NULL; 
    }
    const T* bottom() const {
        return _count ? ((const T*)_items + _mod(_start + _count - 1, _cap)) : NULL; 
    }