89 struct Reader {  struct
91   explicit Reader(std::vector<ShardState>* shard_states,  in Reader()  function
98   void run() {  in run()
117   void readOnceFromShard(uint64_t shard) {  in readOnceFromShard()
185   ~Reader() {  in ~Reader()  argument
192   char pad1[128] __attribute__((__unused__));
193   std::vector<ShardState>* shard_states_;
194   ROCKSDB_NAMESPACE::DB* db_;
195   ROCKSDB_NAMESPACE::port::Thread thread_;
196   sem_t sem_;
197   std::mutex queue_mutex_;
198   std::bitset<MAX_SHARDS + 1> shards_pending_set_;
199   std::queue<uint64_t> shards_pending_queue_;
200   std::atomic<bool> done_{false};
201   char pad2[128] __attribute__((__unused__));