: filename_(filename), file_(std::move(file)), ops_(ops) {}

  ~ModularRandomAccessFile() override { ops_->cleanup(file_.get()); }

  Status Read(uint64 offset, size_t n, StringPiece* result,
              char* scratch) const override;
  Status Name(StringPiece* result) const override;

 private:
  std::string filename_;
  std::unique_ptr<TF_RandomAccessFile> file_;
  const TF_RandomAccessFileOps* ops_;  // not owned