RFR: 8375982: G1: Convert G1YoungCollector helper classes to use Atomic<T>

[Thomas Schatzl]

On Thu, 22 Jan 2026 09:19:07 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review these changes to convert uses of `Atomic<T>` in some `G1YoungCollector` helper classes.
>> 
>> Testing: gha
>> 
>> Thanks,
>>   Thomas
>
> Marked as reviewed by shade (Reviewer).

Thanks @shipilev @kimbarrett for your reviews

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PR Comment: https://git.openjdk.org/jdk/pull/29346#issuecomment-3783981886