RFR: 8262087: Use atomic boolean type in G1FullGCAdjustTask

[Albert Mingkun Yang]

On Mon, 22 Feb 2021 08:51:32 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Use atomic boolean type to make the intention clear.
>
> Marked as reviewed by tschatzl (Reviewer).

Thanks for the review.

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PR: https://git.openjdk.java.net/jdk/pull/2664