Method waitForWrite

bolt/dwio/dwrf/test/CacheInputTest.cpp:377–384

  }

  void waitForWrite() {
    auto ssd = cache_->ssdCache();
    if (ssd) {
      while (ssd->writeInProgress()) {
        std::this_thread::sleep_for(std::chrono::milliseconds(50)); // NOLINT
      }
    }
  }

  // Serializes 'pathToInput_' and 'fileIds_' in multithread test.
  std::mutex mutex_;