RFR: 8311648: Refactor the Arena/Chunk/ChunkPool interface [v4]

[Thomas Stuefe]

On Mon, 10 Jul 2023 11:43:19 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> Hi,
>> 
>> This PR refactors the Arena code without introducing any changes in behavior. I believe that this leads to a much clearer API and that this will in turn simplify the maintenance of this code. `Chunk` is now much more "dumb", mainly acting as a way of interrogating the chunk of data that it is holding. The `ChunkPool` gains a more prominent role, being entirely responsible for the memory allocation strategy used. `Arena` is basically unchanged, as it orchestrates the usage of these two APIs. The `chop` and `next_chop` methods are re-defined to be static inside of `Chunk`, having an object `delete` itself  is very surprising, so I'm happy to get rid of that.
>> 
>> I hope that you agree with me on these changes!
>> 
>> Cheers,
>> Johan
>
> Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move stuff around to make diffs smaller

Looks good.

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Marked as reviewed by stuefe (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/14803#pullrequestreview-1523442138