is there a good way for a callback on an iOS thread to communicate with a different thread using the latest stable coroutines?

Channel

is great when using native-mt, but doesn't work with stable.

Hello guys, I'm trying to setup a Kotlin multiplatform project but the build keeps failing. I'm using the following versions: kotlin version 1.3.72, coroutines version 1.3.8 and ktor version=1.3.1 Below the logs:

> Task :compileKotlinIosArm64
w: skipping /Users/XXX/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-client-ios-iosarm64/1.3.1/2f594cbbb3394fe255137a805e4b3f02bfcb5cae/ktor-client-ios.klib. The abi versions don't match. Expected '[22]', found '17'. The library produced by 1.3.61-release-13550 compiler
e: Could not find "/Users/XXX/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-client-ios-iosarm64/1.3.1/2f594cbbb3394fe255137a805e4b3f02bfcb5cae/ktor-client-ios.klib" in [/Users/XXX/Documents/Development/CCC/kipling-multiplatform-spike/common, /Users/XXX/.konan/klib, /Users/XXX/.konan/kotlin-native-macos-1.3.72/klib/common, /Users/XXX/.konan/kotlin-native-macos-1.3.72/klib/platform/ios_arm64].

I have tried changing the Kotlin version but when I do that other problems happen. I know Kotlin Multiplatform is in Alpha but it's been a painful experience just to setup the project 😭. Any help will be really appreciate it 🙂

Does

atomicfu

provide atomicity in K/N when updated concurrently from multiple threads?

We have some issues migrating to Koltin 1.4.10 for our KMM project. Our current KMM project uses the following versions: Kotlin: 1.3.72 Ktor: 1.3.2 coroutines: 1.3.8 serialization: 0.20.0 We are in the process of upgrading our project to the following versions: Kotlin: 1.4.10 Ktor: 1.4.1 coroutines: 1.3.9-native-mt-2 serialization: 1.0.0-RC2 This upgrade works in our small sample app but in our producten app we get ImmutabilityExceptions. We added the ensureNeverFrozen call to better debug this issue and we are seeing that objects are getting freezed, which results in the following output in the exception (example): Caused by: kotlin.native.concurrent.FreezingException: freezing of Value(Loading(staleData=null, creationTimeStaleData=0)) has failed, first blocker is Loading(staleData=null, creationTimeStaleData=0) Since the exact same code works with the older versions, is there still some issue somewhere in ktor or coroutines library or does the native-mt-2 works differently than the single-threaded variant which now exposes a bug in our code?

Why do I need to mark a top-level

const val

as

@SharedImmutable

? I mean… Can it not be?

I try to use kotlin library in iOS application. I’ve made library in path

build/bin/iosArm64/debugFramework/XpointSdkIos.framework

and copy this into

build/xcode-ios-frameworks/XpointSdkIos.framework

(from example https://github.com/Kotlin/kmm-sample/) Next I’ve added this library to Xcode project. When I try to build iOS application for iPhone Xr and I have the error

Ignoring file .../build/xcode-ios-frameworks/XpointSdkIos.framework/XpointSdkIos, building for iOS-arm64 but attempting to link with file built for iOS Simulator-x86_64

How can I fix it? How can I build library for

iOS-arm64

?

is there anyway to get a 

ByteArray

 backed by native C memory without a copy in Kotlin/Native?

Is it possible to write a data class in a Kotlin Multiplatform library that, when built for macOS, conforms to Equatable (or better yet, Identifiable) out of the box?

Is it possible to build a kotlin native shared library for android? I have kotlin native code using cinterops working fine in other environments, and am now porting to android. I like the JniBridge code in the native samples, and would like to write the native shared library using kotlin instead of C++. But I only know how to do so using NDK and C++., Searches for gradle setup to build a shared jni library written in kotlin native for Android are coming up empty. I have everything needed for linux jvm and windows jvm shared libraries. But can't see how to build for Android. Is this doable, and if so is there a sample gradle example or doc somewhere? I'm targeting both the Arm and X86 64 bit ABIs for Android. Thanks in advance for any info..

Hi everyone, I have a cinterop with libPusher that was working fine in 1.3.72, now in 1.4.10 I'm getting a

SIGABRT

in

objc_loadWeakRetained ()

. This is the stacktrace

#0	0x00007fff5225a33a in __pthread_kill ()
#1	0x00007fff52304e60 in pthread_kill ()
#2	0x00007fff521e9b7c in abort ()
#3	0x000000010571ada9 in konan::abort() ()
#4	0x000000010573566e in TerminateWithUnhandledException ()
#5	0x00000001057355ba in KonanTerminateHandler() ()
#6	0x00007fff500eec87 in std::__terminate(void (*)()) ()
#7	0x00007fff500eec29 in std::terminate() ()
#8	0x000000010571c571 in (anonymous namespace)::_tryRetainImp(objc_object*, objc_selector*) ()
#9	0x00007fff512b88ce in objc_loadWeakRetained ()
#10	0x0000000104583cf6 in -[PTPusher channelAuthorizationDelegate] at {path}/Pods/libPusher/Library/PTPusher.h:139
#11	0x0000000104582934 in -[PTPusher subscribeToChannel:] at {path}/Pods/libPusher/Library/PTPusher.m:287
#12	0x0000000104582d37 in -[PTPusher subscribeAll] at {path}/Pods/libPusher/Library/PTPusher.m:314
#13	0x0000000104583278 in -[PTPusher pusherConnectionDidConnect:] at {path}/Pods/libPusher/Library/PTPusher.m:374
#14	0x000000010458801f in -[PTPusherConnection webSocket:didReceiveMessage:] at {path}/Pods/libPusher/Library/PTPusherConnection.m:155
#15	0x00000001047c0533 in __30-[SRWebSocket _handleMessage:]_block_invoke at {path}/Pods/SocketRocket/SocketRocket/SRWebSocket.m:836
#16	0x000000010ace3f11 in _dispatch_call_block_and_release ()
#17	0x000000010ace4e8e in _dispatch_client_callout ()
#18	0x000000010acf2d97 in _dispatch_main_queue_callback_4CF ()
#19	0x00007fff23da1869 in __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ ()
#20	0x00007fff23d9c3b9 in __CFRunLoopRun ()
#21	0x00007fff23d9b8a4 in CFRunLoopRunSpecific ()
#22	0x00007fff38c05bbe in GSEventRunModal ()
#23	0x00007fff49372964 in UIApplicationMain ()

Hello! What are common ways to implement CI on Windows with installing native libraries (to have them available with

-lXXX

flag)?

There are problems with using POSIX read syscall in Mac OS X:

Hello my kotlin friends! I'm developing a kotlin multiplatform project on Windows and my question is related to a kotlin native unit test. The test runs fine without a debugger. However, if I run with debugger attached then I get an error in an auto-generated file called

ijresolvers.gradle

:

initialization script 'C:\Users\ptran\AppData\Local\Temp\1\ijresolvers.gradle': 268: unexpected char: '\' @ line 268, column 106.
     sk.path, 'DEBUG_SERVER_PATH=C:\Users\ptr

The error has to do with the path separator '\'. Unfortunately I'm on Windows so the path separator needs to be double-backslash, ie

C:\\Users\\ptr ...

This seems it has to do with with Android Studio's JVM debugger. What tool generates the file

ijresolvers.gradle

?

Hi Is there a way to make data classes with default parameter values work properly in Swift? Example:

data class State @JvmOverloads constructor(
    val loading: Boolean = false,
    val data: ResponseBody? = null,
    val error: ApiError? = null
)

In Swift, it is resolved to

init(loading: Bool, data: ResponseBody?, error: ApiError?)

Neither with overloads or default values

Is there the way to use Sentry client on Kotlin/Native?

I still don't get it with KMM. Is it a new thing? Or is the shared framework / maven dependency we are using for months the same thing?

Hey all - can anyone point me towards any documentation (or advice) on accessing your

resources

folder from a native project? I've poked around quite a bit in the old slack convos here, but I'm still not sure if this approach is still the preferred way of doing things?

One more question if anyone has the time - is there a reference for the platform libraries? For isntance, I found

MessageBoxW()

for a Windows native dialog in the Github samples, but I'm not sure where else to look for capabilities like that

There's something called jextract that can replace JNI and is basically cinterop for the modern JVMs. https://inside.java/2020/10/06/jextract/ Would be cool to have something similar in Kotlin that is backwards compatible to JDK 8 and Android (JDK 8 desugared to JDK6/7 then .dex).

How can I get rid of the console window in windows? I write nothing into console

Hey everyone, I am running into issues with

AVCaptureSession

which seems to be dropping frames when used from Kotlin Native. When running the example code below, the didDropSampleBuffer function is called a lot (see logcat). It appears that calling

GC.collect()

from

didOutputSampleBuffer

fixes the issue. Does anyone know what is going wrong here? Is it alright to call

GC.collect()

in this case or is the code wrong (leaking memory?)? I have also uploaded a sample project to GitHub: https://github.com/Thomas-Vos/IosAVExample. If you would like to try the code, you need to run it on a real iPhone because the simulator does not have a camera.

Is there a kotlin mpp implementation of gzip?

Here it says: https://kotlinlang.org/docs/reference/native-overview.html

Kotlin/Native libraries help to share Kotlin code between projects. POSIX, gzip, OpenGL, Metal, Foundation, and many other popular libraries and Apple frameworks are pre-imported and included as Kotlin/Native libraries into the compiler package.

But I can't find anything on that. What does this mean and how can I use these?

Hey everyone 👋 I know this question was asked some time ago https://kotlinlang.slack.com/archives/C3SGXARS6/p1595286014228000 but I would like to revisit @João Gonçalves 🙏. I want to make a Kotlin/Native framework that could be easily consumed by iOS and Android apps. Currently I’m trying to setup iOS part, and I wanted to achieve Cocoapods support, so it will be easy to use on iOS side. The problem is that documentation on Kotlin/Native and most of the examples that I have found that uses

org.jetbrains.kotlin.native.cocoapods

plugin are focused on the scenario that the Android and iOS apps are in the same mono repo and iOS app consumes the Kotlin/Native framework locally - as the added

script_phases

runs gradlew to adjust the used framework. But when the framework is consumed from the github via cocoapods then there there is an error

gradlew: No such file or directory

(https://github.com/JetBrains/kotlin-native/issues/3140). The best would be if on the consumer side java/gralde/gradlew won’t be needed which probably would require Fat framework with (arm64 and x64 binaries)

question about cinterop: i followed this guide to setup curl for native. https://kotlinlang.org/docs/tutorials/native/curl.html now i want to do the same for gumbo-parser : https://github.com/google/gumbo-parser this is the contents of the interop.def file:

headers = gumbo.h curl/curl.h
headerFilter = gumbo/* curl/*

compilerOpts.linux = -I/usr/include -I/usr/include/x86_64-linux-gnu -I/usr/local/Cellar/gumbo-parser/0.10.1/include
compilerOpts.osx = -I/usr/include -I/usr/include/x86_64-linux-gnu -I/usr/local/Cellar/gumbo-parser/0.10.1/include
linkerOpts.osx = -L/opt/local/lib -L/usr/local/opt/curl/lib -lcurl -L/usr/local/Cellar/gumbo-parser/0.10.1/lib -lgumbo
linkerOpts.linux = -L/usr/lib/x86_64-linux-gnu -lcurl

there are no compile errors. curl interops are still generated. but there is nothing for gumbo. this is all using the gradle plugin in intellij for macosx64. since this is not outputting anything for gumbo parser, i did it manually:

cinterop -def interop.def -o gumbo

and then:

klib contents gumbo

and this also outputs nothing. if i try it manually for curl it does output all the info. why is there nothing happening for gumbo parser? thanks in advance!

How to fix issues like "no matching variant"? https://gist.github.com/CommanderTvis/f71d31bf47190b101ddcfff132a1eea1

Hey guys, I’m investigating for the company I work for if we can upgrade to Kotlin 1.4 (we are using Kotlin 1.3.70 right now), but when updating for 1.4.10 or even 1.4.20-M1 I get the following on iOS (we are building a multiplatform project):

Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)

Does anyone knows what might be causing this? This is not happening on our current implementation using 1.3.70, so it might be something that might’ve changed in this new release. Any help would be really nice! Thanks in advance!

Just found a weird error with cinterop on OSX.

I've updated by def file and gradle file: https://github.com/mipt-npm/kmath/blob/gsl-experiment/kmath-gsl/src/nativeInterop/cinterop/libgsl.def https://github.com/mipt-npm/kmath/blob/gsl-experiment/kmath-gsl/build.gradle.kts But the error didn't change: https://github.com/mipt-npm/kmath/runs/1257636736?check_suite_focus=true