Method Dump

be/src/util/cache/lirs-cache.cc:1144–1175

}

vector<HandleBase*> LIRSCacheShard::Dump() {
  DCHECK(initialized_);
  std::lock_guard<MutexType> l(mutex_);

  // For LIRS cache we only collect resident entries (i.e. PROTECTED/UNPROTECTED entries),
  // and ignore entries that are not resident (i.e. TOMBSTONE entries).
  vector<HandleBase*> handles;

  for (LIRSHandle& h : recency_list_) {
    // First walk through 'recency_list_', only collecting PROTECTED entries, ignoring
    // the UNPROTECTED/TOMBSTONE entries. UNPROTECTED entries will be collected later from
    // the unprotected_tombstone_list_.
    if (h.state() == PROTECTED) {
      h.get_reference();
      handles.push_back(&h);
    }
  }

  if (unprotected_list_front_ != nullptr) {
    DCHECK(unprotected_list_front_->unprotected_tombstone_list_hook_.is_linked());
    // From 'unprotected_list_front_' to the end of 'unprotected_tombstone_list_' are all
    // UNPROTECTED entries, collecting them all.
    auto iter = unprotected_tombstone_list_.iterator_to(*unprotected_list_front_);
    while (iter != unprotected_tombstone_list_.end()) {
      iter->get_reference();
      handles.push_back(&*iter);
      ++iter;
    }
  }

  return handles;
}

}  // end anonymous namespace