Method startWrite

bolt/common/caching/SsdCache.cpp:86–97

}

bool SsdCache::startWrite() {
  if (isShutdown_) {
    return false;
  }
  if (writesInProgress_.fetch_add(numShards_) == 0) {
    // No write was pending, so now all shards are counted as writing.
    return true;
  }
  // There were writes in progress, so compensate for the increment.
  writesInProgress_.fetch_sub(numShards_);
  return false;
}

void SsdCache::write(std::vector<CachePin> pins) {
  BOLT_CHECK_LE(numShards_, writesInProgress_);