If I instantiate an object from Kotlin Native inside a Swift function, who deals with the GC when Swift function finishes its scope?

I’m curious, why couldn’t Kotlin/native get the performance numbers it was expecting with ARC? Swift uses ARC and gets solid performance with LLVM.

e: java.lang.IllegalStateException: Unsupported Xcode version 12.4, minimal supported version is 12.5.

Looks like kotlin 1.6.0 apply targets are not supported in GH actions due to old xcode. Is there any workaround for this?

Using Kotlin 1.6.0 this test runs on JVM, but native does not sort properly:

@Test
fun test() {
    val input = listOf("本", "日")
    val output = input.sorted()
    val expected = listOf("日", "本")
    assertEquals(expected, output)
}

i am trying to build a mingw64 binary on linux, as kotlin 1.6.0 shopuld support that now, but i also use ktor in there and am not sure which dependency i am missing to make it link libcurl

> Task :linkReleaseExecutableMingwX64 FAILED
e: /home/nikky/.konan/dependencies/llvm-11.1.0-linux-x64-essentials/bin/clang++ invocation reported errors

The /home/nikky/.konan/dependencies/llvm-11.1.0-linux-x64-essentials/bin/clang++ command returned non-zero exit code: 1.
output:
lld: error: unable to find library -lcurl
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)

anyone got this to work yet ?

Is there any way for K/N to generate framework for OC only? Many times we don’t need to use both OC and Swift, and generating framework for both languages will increase package size significantly i thought.

Is there any option to generate purely single-threaded code? For my use cases, I feel like it might be easier to make stuff work in one thread than to debug multithreading issues.

Something I am confused about: I am creating a Kotlin Native application in IDEA and it creates a build.gradle.kts with 'repositories { mavenCentral() }. I somehow expected the Kotlin Native code not to work with JVM code - why would it include the repository for JVM dependencies?

Does Konan require ncurses 5? The current version is 6, which I have installed. And yet I get the error:

/home/draget/.konan/dependencies/clang-llvm-8.0.0-linux-x86-64/bin/clang++: error while loading shared libraries: libtinfo.so.5: cannot open shared object file: No such file or directory

(I have libtinfo.so.6)

I recently update to IDEA 2021.3 - my bundles Kotlin Plugin shows as

213-1.5.10-release-949-IJ5744.223

. Shouldn't it be

212-1.6.0-release-799-IJ5457.46

? =/ No updates offered from IDEA. Looking at the #intellij channel, it seems like it 2021.3 does not support the most recent Kotlin plugin. As much as I love Jetbrains, the update-experience of IDEA has been a total trainwreck every time, and this time is no different. Starting to loose my motivation for the Kotlin/Native experiment here… <.< I'll start fresh tomorrow.

Hello there, is there a way to have

deinit

function in Kotlin? it would be fine to have that feature at least at

nativeMain

module

Hi, I’m trying to write a little CLI app in kotlin-native. I’d like to produce executables to work on all Linux distros and both macOS distros. Obviously I get that the Linux & macOS executables will need to be different, and that the macOS executables will need to be different too. I’ve been reading, and failing to understand, this thread: https://youtrack.jetbrains.com/issue/KT-38876 I think the takeaway is that you can’t build on a particular distro and then reliably shift the resulting executable between all Linux distros because it links to dependencies that may or may not be there - is that correct?

cinterop question - trying to emulate:

JavaVM* vm;
GetJavaVM(&vm);

With kotlin.cinterop types and my solution seems so verbose. Are there better APIs that I'm missing?

val vm: CPointerVar<JavaVMVar> = allocPointerTo()
val vm2: CPointerVar<CPointerVar<JavaVMVar>> = allocPointerTo()
vm2.pointed = vm
GetJavaVM(vm2.value!!)

How can I get my build size smaller?

I have found what looks like a bug involving the new memory model, and C String arrays. Here is the project (doesn't contain the line that causes the bug): https://gitlab.com/napperley/lvgl-hello/-/tree/keypad-encoder The bug revolves around freeing memory after calling a function from a C library (LVGL - https://lvgl.io/ ). When starting the program a message box appears containing two buttons. The first button has no text, but the second button contains some text (Cancel). If the memory isn't freed then the first button contains some text (Ok). Appending the following line to src/linuxArm32HfpMain/kotlin/main.kt file after line 180 ( https://gitlab.com/napperley/lvgl-hello/-/blob/keypad-encoder/src/linuxArm32HfpMain/kotlin/main.kt#L180 ) causes the bug to occur:

tmpArena.clear()

Need help with translating this code to kotlin:

- (void) MonitorWifiInterface
{
    m_pathMonitor = nw_path_monitor_create();
    
    nw_path_monitor_set_update_handler(m_pathMonitor, ^(nw_path_t  _Nonnull path) {
        NSLog(@"[NetInterfaceUtilies] Network path changed");
     });
 
     nw_path_monitor_start(m_pathMonitor); 
}

Have no idea what to do in

^(nw_path_t  _Nonnull path)

part

Hello all, I’m not sure why my logcat is not updating when I fill in the email and password. Any help please. All the other commented out Logs work.

Hey all, I'm wondering if there's a flag or something in my gradle build that I need to set in order to play with the new 1.6 native memory management system or is it enabled by default? I couldn't seem to find any documentation on the topic.

How can I alloc an array of Longs using allocArrayOf?

How would I write the following in K/N?

static PyObject *
spam_system(PyObject *self, PyObject *args)
{
    const char *command;
    int sts;

    if (!PyArg_ParseTuple(args, "s", &command))
        return NULL;

    // ...

    return Py_INCREF(Py_None);
}

What I've got so far:

private val spamSystem = staticCFunction { self: PyObjectT, args: PyObjectT ->
    val command = ???

    if (PyArg_ParseTuple(args, "", ???) == 0) {
        return@staticCFunction null
    }

    // ...

    Py_None.incref()
}

it's as if it allocates it and copies it over instead of getting a pointer to the static one

Hi All, I am a noob but how come this is giving me red?

Is there any designated moderators we can ping? Brian is clearly a scam account from their actions

Hey, is anyone able to give me an example on how to create a variable that would conform to this type?

value: kotlinx.cinterop.CValuesRef<platform.posix.uint8_tVar>

What does this function

RUNTIME_NOTHROW void Kotlin_initRuntimeIfNeeded()

do? This function is in

kotlin/kotlin-native/runtime/src/main/cpp/Runtime.cpp

. 1. I found it got called all the time when trying to run my iOSApp, then I got a runtime exception when it ran into

InitOrDeinitGlobalVariables(INIT_GLOBALS, result->memoryState);

. It looks like the runtime environment had not fully created at that point, and it has already called OC bridge function, then caused an exception. 2. I also found another problem when using k/n. Top-level properties declared in kotlin will always return null when running iOSApp. I made it a top-level function and it worked. This problem also happened when KN was running into

Kotlin_initRuntimeIfNeeded()

. 3. btw, debug shared.framework and k/n lib with disasm showed in lldb is tough. Is there any way to debug k/n from source when running iOSApp? Does anyone has any idea here?

Just for fun. Let's guess the output result.

data class MyNumber(
    var x: Int
) {
    val isBig1: Boolean = x >= 10

    val isBig2: Boolean
        get() = x >= 10
}

fun main() {
    val number = MyNumber(9)
    println("isBig1 before: ${number.isBig1}")
    println("isBig2 before: ${number.isBig2}")
    number.x = 11
    println("isBig1 after: ${number.isBig1}")
    println("isBig2 after: ${number.isBig2}")
}

When calling variadic C functions spread operator is supported only for *arrayOf(...)

How can I avoid this? Can I write a wrapper function in the .def or something? I already tried

*arrayOf(*x.map { ... }.toTypedArray())

but that was also invalid?

Hi all ! Beginner question here, let’s say I define an extension in

iosMain

:

fun NSData.toByteArray(): ByteArray = ByteArray(this@toByteArray.length.toInt()).apply {
    usePinned {
        memcpy(it.addressOf(0), this@toByteArray.bytes, this@toByteArray.length)
    }
}

This one allows to convert a

NSData

in Objective-C to a

ByteArray

in Kotlin Is it possible to use this function directly in XCode on a

NSData

object ?

dependencies {
    add(PLUGIN_CLASSPATH_CONFIGURATION_NAME, Dependencies.xxxx)
}

Does adding this plugin to k/n take effect during k/n compilation(for iOS)? It looks like this plugin doesn’t work.