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https://issues.apache.org/jira/browse/ARROW-12938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17649474#comment-17649474
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David Li commented on ARROW-12938:
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It looks like this should be possible now, using a self-pipe and a thread?
There'll also be a little fiddliness to register and unregister callbacks
(assuming a StopToken is meant to be sharable among multiple actions).
> [C++] Investigate spawning arbitrary callbacks from StopToken
> -------------------------------------------------------------
>
> Key: ARROW-12938
> URL: https://issues.apache.org/jira/browse/ARROW-12938
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Antoine Pitrou
> Priority: Major
>
> In some situations, we may want to forward stop requests to external
> runtimes, e.g. gRPC (see https://github.com/apache/arrow/pull/10318 ),
> without polling.
> Ideally, one may temporarily add a callback to a StopToken. This bears
> complications, especially in the case where the stop request comes from a
> signal handler.
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