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https://issues.apache.org/jira/browse/ARROW-8732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17226979#comment-17226979
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Ben Kietzman commented on ARROW-8732:
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I'm not sure I see how a {{StopToken}} is distinct from a {{Future<void>}}
which the main thread can optionally MarkFinished and which workers can poll
for completion (completion of the future indicates workers have been cancelled).
> [C++] Let Futures support cancellation
> --------------------------------------
>
> Key: ARROW-8732
> URL: https://issues.apache.org/jira/browse/ARROW-8732
> Project: Apache Arrow
> Issue Type: Wish
> Components: C++
> Reporter: Antoine Pitrou
> Assignee: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> There should be a way for consumers of Futures to notify that they are not
> interested in the task at hand anymore. For some kinds of tasks this may
> allow cancelling the task in-flight (e.g. an IO task, or a task consisting of
> multiple steps).
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