A modern programming language that makes developers happier.

kotlinlang

Is there an idiomatic way to memoize values that works multiplatform (and esp. across threads in Native)?

E.g. `private val hash: Int by lazy { … }` but `lazy` doesn’t work across threads in Native afaik.

I guess there is no such a way in K/N currently. Mutex requires explicit destroy. I would go with something based on atomics.

there’s `atomicLazy` that you can use

<https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.native.concurrent/atomic-lazy.html>

Yep, but I would guess it can call the lambda multiple times under heavy concurrent access. Just like in normal atomics.

Thanks, that sounds good!
So I basically use `lazy` on JVM/JS and `atomicLazy` on native :slightly_smiling_face:
The part “may potentially leak memory” sounds a bit worrying. But I don’t have cyclical references here so it’s probably OK.

My operations are idempotent, so it’s okay if the lambda is called multiple times.