Method CollectEvictableFiles

src/leveldb/persistent_cache/persistent_cache_metadata.cc:288–304

}

std::vector<std::unique_ptr<CacheFile>> PersistentCacheMetaData::CollectEvictableFiles() {
  std::vector<std::unique_ptr<CacheFile>> files;
  {
    std::lock_guard<std::mutex> _{evictable_files_lock_};
    auto iter = evictable_files_.begin();
    while (iter != evictable_files_.end()) {
      // Find all evictable files whose refs_ is zero.
      if ((*iter)->refs_ == 0) {
        files.emplace_back(*iter);
        evictable_files_.erase(iter++);
      } else {
        ++iter;
      }
    }
  }
  return std::move(files);
}
}  // namespace leveldb