RFR: 8342486: Implement JEP 505: Structured Concurrency (Fifth Preview) [v8]

[Alan Bateman]

On Tue, 15 Apr 2025 13:15:25 GMT, Viktor Klang <vklang at openjdk.org> wrote:

>> src/java.base/share/classes/java/util/concurrent/StructuredTaskScope.java line 337:
>> 
>>> 335:  * <a href="{@docRoot}/java.base/java/util/concurrent/package-summary.html#MemoryVisibility">
>>> 336:  * <i>happen-before</i></a> any actions taken by that subtask, which in turn
>>> 337:  * <i>happen-before</i> the subtask result is {@linkplain Subtask#get() retrieved}.
>> 
>> Chen has suggested that this be expanded to specify a HB between onComplete and join. Viktor and I have discussed extending the existing text to deal with subtask outcome that "contributes" to the scope result but did not agree wording (note that this is a pre-existing short-coming in the spec, not a new issue).
>
> I'm not sure where we are on this topic. Clearly there's an edge between the pre-join and post-join phases.

Yes, but it would be a topic for a different PR as we haven't changed anything here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21934#discussion_r2044567696