Hi, Do you know how to solve this problem?

There are 132 libraries libraries from the Kotlin/Native 1.3.61 distribution attached to the project: stdlib, AVFoundation, AVKit, Accelerate, Accounts, ...  These libraries were compiled with an older Kotlin/Native compiler and can't be read in IDE. Please edit Gradle buildfile(s) to use Kotlin Gradle plugin version 1.4-M2. Then re-import the project in IDE.

I’m already using Kotlin

1.4-M2

but it looks like Kotlin/Native still keeps downloading this version. How can I force it to use

1.4-M2

? I’m using Gradle with KTS

Hi, Where can I find the definition of this function

platform.posix.system(command)

? I’d like to get the output or the error, like we do with the inputStream and errorStream for jvm. I tried to find inside of the repo but it is difficult to locate it there

I have a public variable:

@SharedImmutable
var APPENDER: Appender = ConsoleOutputAppender

And I have error

kotlin.native.IncorrectDereferenceException: Trying to access top level value not marked as @ThreadLocal or @SharedImmutable from non-main thread
...
at 6  app.kexe           0x00000001022aae84 kfun:mu.<get-APPENDER>()Appender + 100 (File.kt:10:1)

on read this variable. But why?

@SharedImmutable

was added.

I am getting this fatal error when trying to run iOS simulator tests for a Kotlin Multiplatform project:

com.intellij.execution.ExecutionException: No configuration for executable=KonanExecutableBase(targetType=ios_x64, targetName=iOSSim, executableName=test, projectPrefix=:flowdriver:)
	at com.jetbrains.mpp.debugger.GradleLLDBBackend.binaryConfiguration(GradleLLDBBackend.kt:21)
	at com.jetbrains.mpp.debugger.GradleLLDBBackend.binaryConfiguration(GradleLLDBBackend.kt:16)
	at com.jetbrains.mpp.debugger.LLDBBackendBase.debugConfigurationSettings(LLDBBackendBase.kt:95)
	at com.intellij.openapi.externalSystem.service.execution.ForkedDebuggerThread.handleForkedProcessSignal(ForkedDebuggerThread.java:143)
	at com.intellij.openapi.externalSystem.service.execution.ForkedDebuggerThread.run(ForkedDebuggerThread.java:102)

Notably, when I tried to run these tests the first time, an Xcode dialog popped up asking for my password to give permission for

xcrun

(or something like that) and I accidentally clicked cancel and dismissed the prompt. Is it possible that I need to somehow reset that prompt so I can enter my password and fix this?

What position is Kotlin Native currently at with performance guarantees (eg soft real time - https://blog.jetbrains.com/kotlin/2018/02/application-development-in-kotlinnative/ )? Which performance guarantees will Kotlin Native provide when it reaches 1.0 (aka stable)?

Hi, I have used cinterop for android in kotlin native successfully in the past but when now I try the same thing for windows, Kotlin native is not able to build it. I keep getting e: C:\Users\t-mapodd\.konan\dependencies\msys2-mingw-w64-x86_64-clang-llvm-lld-compiler_rt-8.0.1/bin/clang++ invocation reported errors I thought, that function definitions are not important in compile time and hence just with the header file it would build similar to what I did for android but it's not able to build without function definition it seems. Has anyone worked with cinterop in mingw(windows target) in kotlin native?

Hi! Are iOS’ nullable

init

s supported? As I can see, Kotlin interop nullable init methods are deprecated in favor of constructors but constructors cannot produce

null

, do they? Am I missing something? For example: https://developer.apple.com/documentation/foundation/nsurl/1413146-init

Hello! I’m trying to do something but I’m unable to right now, what I have is the following:

private fun getDataFromUrl(url: NSURL) {
        NSURLSession.sharedSession.dataTaskWithURL(
            url = url,
            completionHandler = ::getCompletion.freeze()
        ).resume()
    }

So with this, I will get data from a URL After that, with my getCompletion

fun getCompletion(data: NSData?, response: NSURLResponse?, error: NSError?){
    var downloadedImage = UIImage(data = data)
    logo.setImage(image = downloadedImage)
    logo.setHidden(false)
}

Where my logo is a UIImage. Problem is, the

getCompletion

is being called from a background thread and I’m trying to update something on the main thread. Is there any way of doing this? The goal is to be able to download the image asynchronously and after that, update the image I already have. What I’m getting as an error is the following:

Main Thread Checker: UI API called on a background thread: -[UIImageView setImage:]

Has anyone ever gotten an "Initializer is not implemented" error when trying to subclass an Obj-C class?

Hi everyone. I have successfully built .dll using kotlin multiplatform. I am using these .dll in my windows console app(using visual studio as IDE, I am not sure if that's important). when I am calling a function from my console app which is returning 8 a/c to KMP, it's printing some gibberish like 123453245 instead of 8. Has anyone faced the same issue, can anyone help me here? I think, the way I am calling it is forcing KMP to return pointer. Is there any documentation which suggests how to call functions written in header files generated by KMP in a windows app?

Kotlin collections are based on Java collections, according to the documentation. What does this mean for collections in Kotlin/Native? Are the simply 'not available'? And if yes, what is the future plan for this?

What I need to use in worker instead of

sleep

?

Worker.start().execute(TransferMode.SAFE, {}) {
  ...
  ??? sleep(100u)
}

On MacOS

sleep

leads error

flock failed to lock maps file: errno = 35

delay

doesn’t allowed out of coroutine.

fileUrlWithPath takes a path that starts with

/

does anyone have an example handy of accessing kotlin native from python?

Hi everyone.

TfLiteTensorCopyFromBuffer(input_tensor, inputs as CValuesRef<*>, inputs.size as ULong)

"inputs" is of type Array<Any>. I want to extract the data from this "inputs" and feed it to tensorflow function(I am using cinterop to access tensorflow C API) but in runtime it throws me error as Array<Any> cannot be typecasted to CValuesRef<*>. I am asssuming there must be some function like "inputs.data" or something which can do the job. could anyone help me here please?

Hi I have problems with Info.plist in MacOS application. My app must to get GPS information. I call

CLLocationManager.requestAlwaysAuthorization

on start. It works from IDEA or command line. But when I make PKG file by this and create Info.plist file. If I add into file

<key>NSLocationUsageDescription</key>
    <string>My information</string>

application doesn’t use message, ask me any time, write info console the error

app.kexe[31495:7080886] There was an error parsing the Info.plist for the bundle at URL <....>: NSCocoaErrorDomain - 3840

and CAN’T get gps info. If I add into file

<key>NSLocationAlwaysUsageDescription</key>

application ask me ONE time, write info console the same error

app.kexe[31495:7080886] There was an error parsing the Info.plist for the bundle at URL <....>: NSCocoaErrorDomain - 3840

and GETS gps info. But Launchpad ignored my app 🤯 What have I to do?

is there any Jetbrains IDE at the moment with a working Kotlin/Native debugger for macos or (preferably) iosX64 targets?

Hi everyone,

headers = cinterop/c_interop/native/native.h
linkerOpts.mingw = -Lwindows_x86_64/native.lib

how should I put the relative path in headers(in windows.def file)? my directory structure is Intellligence/src/nativeInterop/cinterop/windows.def my build.gradle is in Intelligence/build.gradle

Hi, I've been trying out the latest kotlin-coroutines 1.3.7-native-mt-1.4-M2 on iOS and running into some challenges. Code here is based on the flow documentation description for flowOn. https://kotlinlang.org/docs/reference/coroutines/flow.html I've also watched kotlinconf topic for kotlin native concurrency, so I understand objects are frozen, but for the life of me I can't figure out a combination that will allow me to set the value on StateFlow. I've tried numerous combinations and ultimately all paths throw the InvalidMutabilityException. Error occurs in the stateSetter call. Any help would be appreciated.

typealias Reducer<TState> = (TState, Action) -> TState

@OptIn(ExperimentalCoroutinesApi::class)
open class KStore<TState:Any>(initialState: TState, private val reducer: Reducer<TState>) {
    private val state = MutableStateFlow(initialState)

    private fun currentState() = state.value
    private fun setState(newState: TState) {
        state.value = newState
    }

    fun dispatch(action: Action) {
        val currentGetter: () -> TState = ::currentState
        val stateSetter: (TState) -> Unit = ::setState
        val stateChanges = when(action) {
            is FlowAction -> action.toFlow()
            else -> flow { emit(action )}
        }.map {
            reducer(currentGetter(), it)
        }.flowOn(Dispatchers.Default)
        println("Got state changes")
        stateChanges.onEach {
            stateSetter(it)
        }.launchIn(UIScope())
    }

    //callback method for pushing back to swift, hopefully a better alternative can be found
    fun listen(onStateChange: (TState) -> Unit) = runBlocking {
        state.onEach {
            onStateChange(it)
        }.launchIn(UIScope())
    }
}

Hi everyone, I have two CPointers in kotlin( val voidPtr = stableRef.asCPointer()) does kotlin have an equivalent substitute of memcpy from C? How do I copy the contents from one pointer to another in kotlin?

After updating Intellij Idea, dependencies don't resolve and the project doesn't compile.

Hi everyone, I will appreciate if someone with kotlin native experience can review this PR from @napperley https://github.com/MicroUtils/kotlin-logging/pull/119

Is there a way to see symbols in the stack trace? I'm using

NativeBuildType.DEBUG

which I thought would do the job.

I/Konan_main: Uncaught Kotlin exception: 
    kotlin.IllegalStateException: Test error!
I/Konan_main:     at  (0x7e54f3d758) // ???
I/Konan_main:     at  (0x7e54f37704) // ???
        at  (0x7e54f37374) // ???
        at  (0x7e54f37834) // ???
        at  (0x7e54fba8fc) // ???
        at  (0x7e54fc7538) // ???
        at  (0x7e54fb934c) // ???
        at  (0x7e54f935b8) // ???
        at  (0x7e54f91420) // ???
        at  (0x7e54fac57c) // ???
        at Java_my_package_my_method (0x7e54ff99b0)
        at oatexec (0x7e5541c720)

What is correct way to terminate a Worker? Or how currently running job can check if it's time to exit? Like Java's

isInterrupted

.

Is there any performance stats for Kotlin/Native framework against Swift IOS with SQLite queries? Attached is my sample stat for a simple select query(select * from table) for around 40 rows of data. First column - Kotlin/Native - 0.0.285 s | Second column - IOS Swift - 0.0116 (Note: SQLDelight Queries in Kotlin/Native and SQLite Framework queries Swift IOS). Some stats or suggestion on how to take stats and any pin points to known performance drawback would be enlightening.

Is there way to write JNI binding for Kotlin/JVM under Kotlin/Native (instead of C++)?

Has anyone tried running Kotlin/Native based project on macOS Big Sur Beta and XCode 12.0 beta? I'm getting following errors in XCode with that combination (Big Sur + XCode 11.5 is fine). It's probably expected there'd be issues but just in case anyone knows of any way to resolve....

Undefined symbols for architecture x86_64:
  "_DAAddCallbackToSession", referenced from:
      _platform_DiskArbitration_DAAddCallbackToSession_wrapper10 in common(result.o)
     (maybe you meant: knifunptr_platform_DiskArbitration10_DAAddCallbackToSession, _platform_DiskArbitration_DAAddCallbackToSession_wrapper10 )
  "_DACallbackCreate", referenced from:
      _platform_DiskArbitration_DACallbackCreate_wrapper9 in common(result.o)
     (maybe you meant: knifunptr_platform_DiskArbitration9_DACallbackCreate, _platform_DiskArbitration_DACallbackCreate_wrapper9 )
  "_DAGetCallbackFromSession", referenced from:
      _platform_DiskArbitration_DAGetCallbackFromSession_wrapper13 in common(result.o)
     (maybe you meant: _platform_DiskArbitration_DAGetCallbackFromSession_wrapper13, knifunptr_platform_DiskArbitration13_DAGetCallbackFromSession )
  "_DARemoveCallbackFromSession", referenced from:
      _platform_DiskArbitration_DARemoveCallbackFromSession_wrapper12 in common(result.o)
     (maybe you meant: knifunptr_platform_DiskArbitration12_DARemoveCallbackFromSession, knifunptr_platform_DiskArbitration11_DARemoveCallbackFromSessionWithKey , _platform_DiskArbitration_DARemoveCallbackFromSessionWithKey_wrapper11 , _platform_DiskArbitration_DARemoveCallbackFromSession_wrapper12 )
  "_DARemoveCallbackFromSessionWithKey", referenced from:
      _platform_DiskArbitration_DARemoveCallbackFromSessionWithKey_wrapper11 in common(result.o)
     (maybe you meant: knifunptr_platform_DiskArbitration11_DARemoveCallbackFromSessionWithKey, _platform_DiskArbitration_DARemoveCallbackFromSessionWithKey_wrapper11 )
  "__kernelrpc_mach_port_destroy_trap", referenced from:
      _platform_darwin__kernelrpc_mach_port_destroy_trap_wrapper856 in common(result.o)
     (maybe you meant: _platform_darwin__kernelrpc_mach_port_destroy_trap_wrapper856, knifunptr_platform_darwin889__kernelrpc_mach_port_destroy_trap )
  "_objc_setHook_setAssociatedObject", referenced from:
      _platform_objc_objc_setHook_setAssociatedObject_wrapper100 in common(result.o)
     (maybe you meant: knifunptr_platform_objc100_objc_setHook_setAssociatedObject, _platform_objc_objc_setHook_setAssociatedObject_wrapper100 )

Hi everyone, I have generated .dll using kotlin native for windows. I am able to access the functions from windows c++ console app as well(voila!) but I am not able to do the same for a c# windows app. [DllImport("libnative.dll", SetLastError = true)] public static extern void libnative_symbols()->kotlin.root.packagename.main(); I was able to call libnative_symbols()->kotlin.root.packagename.main(); from c++ windows console app but I am not able to call if from a c# app. could anyone redirect me to any example or resource?

How compatible is Kotlin with Swift Package Manager? My iOS team is talking about swapping over.

What would be a good ui toolkit to use with kotlin MP on windows