Function FileSystemDefer

cpp/src/arrow/filesystem/filesystem.cc:153–162

template <typename DeferredFunc>
auto FileSystemDefer(FileSystem* fs, bool synchronous, DeferredFunc&& func)
    -> decltype(DeferNotOk(
        fs->io_context().executor()->Submit(func, std::shared_ptr<FileSystem>{}))) {
  auto self = fs->shared_from_this();
  if (synchronous) {
    return std::forward<DeferredFunc>(func)(std::move(self));
  }
  return DeferNotOk(io::internal::SubmitIO(
      fs->io_context(), std::forward<DeferredFunc>(func), std::move(self)));
}

}  // namespace