Method empty

be/src/util/internal-queue.h:230–233

    return SizeLocked();
  }
  bool empty() const {
    std::lock_guard<LockType> lock(lock_);
    return IsEmptyLocked();
  }

  /// Returns if the target is on the queue. This is O(1) and does not acquire any locks.
  bool Contains(const T* target) const {