RFR: 8376353: Parallel: Convert PSParallelCompact classes to use Atomic<T>

[Ivan Walulya]

On Mon, 26 Jan 2026 16:58:25 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review this change to convert `PSParallelCompact` to use `Atomic<T>`.
> 
> Testing: tier1-5,gha
> 
> Thanks,
>   Thomas

Note:
These files seem to follow a different style guide. 

Example:
`class SplitInfo
{`

then many of the constructors are `defaulted`, not clear if that is intentional.

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Marked as reviewed by iwalulya (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29425#pullrequestreview-3740974678