Waiting for interop for jvm grin

Question

msink · Answer

Why not just use Kotlin JVM What is use case

gildor · Answer

To replace JNI Actually not sure what it should be Some compiler plugin for Kotlin JVM or some Kotlin Native and Kotlin JVM interop

msink · Answer

So it s really not interop with jvm but interop jvm and c

msink · Answer

cinterop flavor=jvm

olonho · Answer

yes Mike is right we do have although do not support Kotlin JVM gt C interop for internal purposes

benny.huo · Answer

After hours of searching I still don t know how to use cinterop flavor=jvm I just want to use Kotlin to replace Java on Jvm part and c c++ on native part

gildor · Answer

There are two similar but not exactly the same cases JVM interop with C JVM interop with Kotlin Native They are interchangeable sometimes but would be nice to have both

gildor · Answer

Maybe to have both as the same interop system Actually for us most important to have C but we plan to have also K N components in the future so seamless interop with K N from JVM would be good too even on level of common modules for example without exposing of native types or APIs

benny.huo · Answer

Agreed

louiscad · Answer

I think opening Kotlin JVM lt gt C amp Kotlin Native interop should be done as an experimental feature in future stages of Kotlin Native so the Kotlin team can get feedback on the first interop design and break things under experimental status if redesign changes are needed

gildor · Answer

Would happy to test such experimental feature with our project

olonho · Answer

Technically nothing prevents you from using Kotlin JVM gt C interop right away it is not closed in any way

louiscad · Answer

I m just not skilled enough to figure it out at the moment

napperley · Answer

Next best thing would be having serialisation message passing in a static API style between Kotlin JVM Kotlin Native and Kotlin JS grinning

gildor · Answer

I just want to add some general comment about Kotlin JVM and Native interoperability I understand that K N not intended to fix JNI problem but I think it would be a really good starting point for K N same way as interop with Java have been a good starting point for Kotlin JVM For example in our case most of app code is Kotlin JVM but we have a big native part on C C++ because of performance realtime audio processing and to share code with iOS and probably in future Web And JNI support is really tedious and unnatural But If we would have good interop Kotlin JVM to Kotlin Native or direct interop to C using K N tools like flavor=jvm we would be happy to use it instead of JNI and it will give us a good opportunity to adopt K N for our native layer and not only for interop but also as good option to share code for all our platforms and as replacement for C C++ for some not performant critical parts for example we have a lot of Json work in native and would happy to use Kotinx Serialization or just Kotlin for such code I m not a native guy but interop with K N and C would allow me and my team to be closer to our native developers and combine effort with them

olonho · Answer

Thanks Andrey it makes perfect sense although we have to keep balance with other directions of work we fully understand importance of productization of Kotlin JVM gt C interop