RFR: 8351565: Implement JEP 502: Stable Values (Preview) [v33]

[Per Minborg]

On Wed, 2 Apr 2025 14:24:20 GMT, Viktor Klang <vklang at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add info that Map#values and Map#entrySet are stable
>
> src/java.base/share/classes/java/lang/StableValue.java line 377:
> 
>> 375:  *
>> 376:  * <h2 id="thread-safety">Thread Safety</h2>
>> 377:  * The content of a stable value is guaranteed to be set at most once. If competing
> 
> Suggestion:
> 
>  * The contents of a stable value is guaranteed to be set at most once. If competing

I think it should be "content" as only one element can be set?

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PR Review Comment: https://git.openjdk.org/jdk/pull/23972#discussion_r2026493761