RFR: 8274069: Clean up g1ParScanThreadState a bit [v2]

[Albert Mingkun Yang]

On Tue, 21 Sep 2021 13:49:04 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   can I have reviews for this change that does some minor refactoring for issues found in JDK-8271880/PR#5037:
>> 
>> - remove declaration without definition
>> - move inlined code into hpp file
>> - factor out some code
>> 
>> Testing: gha, local compilation, local gc/g1
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   ayang review, renaming

The old name, `enqueue_card_after_barrier_filters`, is still referenced in the comments.

(I also wonder if it makes sense to unify all callers of `enqueue_card_if_tracked` to use `write_ref_field_post` with template non-type arguments. Not in PR ofc.)

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Marked as reviewed by ayang (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5607