563         tail->next = first;  in putList()
564         if (first)  in putList()
565             first->prev = tail;  in putList()
566         first = head;  in putList()
577     if (!usedSize.load(std::memory_order_relaxed) && !first)  in putList()
586     LargeMemoryBlock *result=first;  in get()
588         first = result->next;  in get()
589         if (first)  in get()
590             first->prev = nullptr;  in get()
655         toRelease = first;  in cleanToThreshold()
656         first = nullptr;  in cleanToThreshold()
672     LargeMemoryBlock *toRelease = first;  in cleanAll()
674     first = nullptr;  in cleanAll()
690     if (first)  in reportStat()