FFM goes final!

[Duncan Gittins]

This is great news, well done everyone involved.

It would be very helpful if the JDK22 compatible download was also in the
usual place: https://jdk.java.net/jextract/ - this might encourage others
to try it out without needing to access the repository / build it

Kind regards

Duncan

On Fri, 20 Oct 2023 at 12:17, 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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