RFR: 8193559: ugly DO_JAVA_THREADS macro should be replaced [v4]

[Daniel D.Daugherty]

On Fri, 30 Jul 2021 02:30:50 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Daniel D. Daugherty has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8193559.kbarrett.part1 - Kim's proposed rewrite using newer C++ features.
>
> Hi Dan,
> 
> I can't comment on all the details of C++ Iterator definitions etc but these new foreach loops are definitely not ugly.  :)
> 
> Looks good!
> 
> Thanks,
> David

@dholmes-ora - Thanks for the re-review.
@kimbarrett - Thanks for answering @dholmes-ora's query.

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PR: https://git.openjdk.java.net/jdk/pull/4671