RFR: 8376357: Parallel: Convert MutableSpace classes to use Atomic<T>

[Ivan Walulya]

On Mon, 26 Jan 2026 17:14:07 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review these changes that convert `MutableSpace` classes to use `Atomic<T>`.
> 
> Testing: gha, tier1-5
> 
> Thanks,
>   Thomas

Marked as reviewed by iwalulya (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29427#pullrequestreview-3739922441