<@U3SK5B492> Something that's still not clear to m...

# kotlin-native

[spierce7]

@olonho Something that's still not clear to me. You kind of reference this on the 2nd to last slide on your presentation. If I create a library in Kotlin/native and use it in Swift / ObjC. Let's say the library has a ServerApi class to call and access the server endpoints. Am I allowed to share the ServerApi object instance between threads as I would normally in Swift / ObjC?

[olonho]

it depends on mutability of the ServerApi object, if it's frozen (and maybe just encapsulate mutable state in an Objective-C object) then yes. See https://github.com/JetBrains/kotlin-native/pull/2177/files where I sketeched solution for the similar problem.

[spierce7]

I see. Freezing the HttpDelegate will freeze the references to NSOperationQueue and NSMutableData, and because those aren't Kotlin objects, they can still have new operations queued, and data added?

[olonho]

yeah, although in the case of NSMutableData it's not strictly required that matching Kotlin object is frozen, it could be passed with the URL

[hmole]

You should probably emphasize it here <https://github.com/JetBrains/kotlin-native/blob/master/CONCURRENCY.md#transfer>. Up until now I too though that freezing applies to everything, not just K/N objects.

[yusuf3000]

Where did you see these slides? Is there a link?