FFM goes final!

[Chris Vest]

Congratulations to the team!

On Fri, Oct 20, 2023 at 7:28 AM Gavin Ray <ray.gavin97 at gmail.com> wrote:

> Huge congratulations and thank-you to all involved -- Maurizio, Jorn, Per,
> and the many others that have engaged in the mailing list discussions and
> code contributions.
>
> A big day for Java and the JVM indeed!
>
> On Fri, Oct 20, 2023 at 7:17 AM Maurizio Cimadamore <
> maurizio.cimadamore at oracle.com> wrote:
>
>> Hi,
>> As some of you might know, JEP 454 has landed in the JDK repository and
>> the FFM API is no longer a preview API :-)
>>
>> A binary snapshot containing the Java 22 changes is available here:
>>
>> https://jdk.java.net/22/
>>
>> And, a jextract branch to go with it is also available here:
>>
>> https://github.com/openjdk/jextract/tree/jdk22
>>
>> Over the last few months the focus has been on further polishing the
>> rough edges of the API. We have just published a PR [1] which enhances
>> the "critical" linker option so that heap segments can be passed
>> directly to native code (w/o copy). We believe this further enhancement
>> should bring some benefits for legacy APIs that are "stuck" dealing with
>> byte arrays, but need to interop with native code.
>>
>> We have also been working on the tooling aspect of restricted methods,
>> adding support for restricted method warnings in javac [2] and also
>> adding better javadoc support for restricted methods [3].
>>
>> It is also nice to see the first attempts at using FFM within the JDK
>> itself [4], we hope this trend is one that will continue.
>>
>> Of course, finalizing the API doesn't mean we're done (is there ever
>> such a thing?). We are actively exploring ways to model foreign data
>> with records, and we plan to make more progress on improving the startup
>> of FFM clients. More longer term, there's a lot of interesting synergies
>> to look forward to, from structured arenas (Loom) to better support for
>> unsigned types (Valhalla). Plenty of exciting stuff to work on still!
>>
>> We'd also like to take a moment to thank all of you. It is a privilege
>> to be in a position to improve the Java platform, and one that we do not
>> take lightly. But, without your help, all our efforts will be in vain.
>> So we're very grateful for the feedback you have provided along the way,
>> in every shape or form, be it a bug report, a benchmark or even just a
>> "git checkout" to see what's up. You are the pulsating heart of what we
>> call Java. Please keep it up, and keep helping us making Java a better
>> language/platform.
>>
>> Cheers
>> Maurizio
>>
>> [1] - https://git.openjdk.org/jdk/pull/16201
>> [2] - https://git.openjdk.org/jdk/pull/15964
>> [3] - https://github.com/openjdk/jdk/pull/16188
>> [4] - https://git.openjdk.org/jdk/pull/15476
>>
>>
>>
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