Method Lookup

be/src/kudu/util/cache.cc:393–410

template<Cache::EvictionPolicy policy>
Cache::Handle* CacheShard<policy>::Lookup(const Slice& key,
                                          uint32_t hash,
                                          bool caching) {
  RLHandle* e;
  {
    std::lock_guard<decltype(mutex_)> l(mutex_);
    e = table_.Lookup(key, hash);
    if (e != nullptr) {
      e->refs.fetch_add(1, std::memory_order_relaxed);
      RL_UpdateAfterLookup(e);
    }
  }

  // Do the metrics outside of the lock.
  UpdateMetricsLookup(e != nullptr, caching);

  return reinterpret_cast<Cache::Handle*>(e);
}

template<Cache::EvictionPolicy policy>
void CacheShard<policy>::Release(Cache::Handle* handle) {