I'm trying to implement such function in K/N, cinterop generated first signature, but looks like it clear memory of pointers passed into it, I see that I can make them just NativePtr, but than it's hard to travers passed structs. How to instruct K/N to not clear passed ptrs?

Hey, someone know how cast variable f.e

UInt

to

CPointer

?

I am trying to use this https://khttp.readthedocs.io/en/latest/ library instead of Java HTTP. But it seems to work only for the Android target in a multiplatform scenario. It’s not even detecting on iOS or Common targets, although I have mentioned the dependency tag and repository URL in the respective gradle files! Any ideas?

Hi guys, I am trying to use Ktor for my iOS target in a multiplatform scenario. Has anyone come across an error like this?

https://github.com/olonho/ktor-sample/ is an example how to use ktor and kotlinx.serialization in Kotlin/Native projects.

Hey, currently I manage to draw triangle in opengl when importing glew and glfw. The only issue for now is that every macro like function from C is generated by cinterop as a nullable so for each call I need make not-null asserted cast. Is there any way to tell cinterop that I trust that all macros like functions can't be nullable?

Wondering if anyone could help me with memory issues on iOS? I'm trying to figure out how to keep a weak reference to a UIViewController within a Kotlin class instance, without preventing the ViewController from deiniting. This is what I'm currently trying on the Kotlin side:

class KotlinWeakViewController(private val weak: WeakReference<UIViewController>) {
    constructor(viewController: UIViewController) : this(WeakReference(viewController))

    val viewController get() = weak.get()
}

And I have this in my Swift VC:``` private var weakVc: KotlinWeakViewController? required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) //weakVc = KotlinWeakViewController(viewController: self) weakVc = KotlinWeakViewController(weak: KotlinWeakReference(referred: self)) weakVc = nil } deinit { print("ViewController deinit") } ``` Unfortunately the ViewController never seems to deinit if I instantiate the

KotlinWeakViewController

, regardless of whether I create the

WeakReference

on the Kotlin side or on the Swift side, and regardless of whether I keep the reference to the

KotlinWeakViewController

around in an instance variable or nil it immediately.

My iOS app crashes with the following error:

malloc: *** error for object 0x280872d78: pointer being freed was not allocated
malloc: *** set a breakpoint in malloc_error_break to debug

I am guessing I am doing something wrong with my cinterop code. How can I find the cause of the issue in my code?

I have a similar exception

Invalid module

https://kotlinlang.slack.com/archives/C3PQML5NU/p1548688304549700 for

1.3.50-eap-5

Is it possible to implement more meaningful message from `LLVMVerifyModule`as TODO here states? (if it makes sense at all) https://github.com/JetBrains/kotlin-native/blob/b0c74ec00b91038cc2e587e0017d919fd5dbbadc/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt#L65

Hello, is this code supposed to throw an

InvalidMutabilityException

? If you move the

init

to the end (after the lazy val) it does not throw the exception.

fun main() {
    Example()
}

class Example {

    init {
        freeze()
    }

    val value by lazy { 1 }
}

I am trying to do a cinterop on the rocksdb headers. It fails on

#include <map>

with exception:

/include/rocksdb/db.h:13:10: fatal error: 'map' file not found

. This is the .h file: https://github.com/facebook/rocksdb/blob/master/include/rocksdb/db.h . What am I doing wrong? (This cinterop thing is new to me so maybe I am missing something obvious)

Performance question: the following code takes ~47 secs on K/N with Kotlin 1.3.31 and ~29 secs with Kotlin 1.3.41 (Linux X64 target). And just 1.3 sec on JVM. Both on the same machine. I'm wondering, what is the reason?

var map: Map<Int, Int> = emptyMap()
    repeat(10000) {
        map += it to it * 2
    }

it's not clear how to use

@ObjCMethod

-

@ObjCMethod external override fun viewDidLoad() {

. the generated bindings don't seem to pass any args to that annotation.

what in the world is this

__attribute__((unavailable("Kotlin subclass of Objective-C class can't be imported")))

how would you pass a selector to an

addTarget

call on a UIControl?

Hi! How can i use

allocArrayOf()

inside

memScoped{ }

to alloc array of

double

? I’m surprised that it works only for

float

. Kotlin version

1.3.30

Lost a couple hours on this one. The following code fails to compile on native in 1.3.41:

fun main() {
    val label = "hello"
    val lambda: suspend () -> String = { label }
}

Apparently the compiler chokes on a variable named

label

being passed into a suspend lambda. The problem goes away if a different name than

label

is used. I’d toss it in youtrack but it seems to already be fixed in the 1.3.50 eap.

I want to create a kotlin native project to generate a static library. I would like the project to have a structure like this:

src/nativeMain // contains "generic" code that can be used in other dir
src/macosMain // contains "specific" code for macOS
src/mingwMain // contains "specific" code for Windows

From my understanding, the

build.gradle

needs to look like this:

kotlin {
      macosX64("macos") {
        binaries {
            staticLib {
            }
        }
    }

      mingwX64("mingw") {
        binaries {
            staticLib {
            }
        }
    }
}

But I am unclear how I include

nativeMain

which should be part of the static library as well as how I declare a dependency (

macosMain

depends on

nativeMain

) Any help appreciated.

Hey guys, I’d like to use new API only available on with Xcode 11 Beta. When will the bindings be generated for those new API so that I can use them in Kotlin Native for iOS (and subsequently in a mpp project)? If I compile Kotlin native myself locally will it generate those bindings for me ?

Kotlin native can only use other libraries that support native right? I.e i cant kotlin native a vertx application?

Hello, can I build Kotlin-native for iOS directly in Swift?

Hey, guys. I have kotlin mpp project and i’ve just managed to compile it for JVM and native (macosx). In my benchmarks native release app is ~10x slower than JVM one. This is how native target is added in `build.gradle`:

macosX64("native") {
            binaries {
                executable()
            }
        }

. The measurements are done with trivial

measureTimeMillis()

What can be the reason? Any optimizations turned off?

How can I ship resources with klib? We have some config files we would like to define in a multi-platform library and use them in a different app

If I want to embed a C or Obj-C file (

.h

+

.c

or

.m

) into a Kotlin/Native library, is setting up C-interop enough, or do I also need to do something special to export the file?

Is there a way to make cinterop generate Obj-C -> Kotlin bindings that have generics? Currently,

id <SomeProtocol>

ends up being

Any?

. I tried to add

extraOpts("-Xobjc-generics")

in the cinterop from my

build.gradle.kts

, but then, the cinterop gradle task fails, telling the option is unknown.

Can I get the

KotlinKClass

of Kotlin class from Swift/obj-C (in order to then pass it to a kotlin method)? I.e. the equivalent of

ClassName::class

on the Kotlin side?

Does kotlin/native require JDK 8 only? same project successful compiles to iosArm64 with JDK 8, but doesn't compile on JDK 10.

How do i start project for raspberry kotlin/native in intellij on my pc? And can i use java libs in them though maven/gradle?

I have a very small kotlin native project that generates a static lib:

package sample

import platform.AppKit.NSView

fun attached(parent: NSView) : Boolean {
    println("kotlin::attached(${parent.window()})")
    return true
}

Then I have another (C++) project consuming the library and calling:

lib->kotlin.root.sample.attached({ parent }))

where

parent

is a

NSView

that was created by some code I am not responsible for (it is passed to me). This simple code crashes... From the screenshot attached I can confirm that what is passed to me is a

NSView

pointer... but somehow on the kotlin side it crashes. I have tried with a few methods on

NSView

and they all trigger a crash. Any idea? Am I doing something wrong?