[ARROW-8299] [C++] Reusable "optional ParallelFor" function for optional use of multithreading

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.17.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/17111
• Assignee: Liya Fan
• Reporter: Wes McKinney
• Created: 31/Mar/20 18:05
• Updated: 11/Jan/23 07:59
• Resolved: 08/Apr/20 14:28

Description

We often see code like

    if (use_threads) {
      return ::arrow::internal::ParallelFor(n, Func);
    } else {
      for (size_t i = 0; i < n; ++i) {
        RETURN_NOT_OK(Func(i));
      }
      return Status::OK();

It might be nice to have a helper function to do this. It doesn't even need to be an inline template, it could be a precompiled function accepting std::function<Status(int)>

Issue Links

• links to: GitHub Pull Request #6870