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

[Thomas Schatzl]

On Wed, 21 Jan 2026 12:48:49 GMT, Thomas Schatzl <tschatzl 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

The failure is about code compilation.

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PR Comment: https://git.openjdk.org/jdk/pull/29346#issuecomment-3783179624