Re: Wrong copy of sequences?
Yes, I understand. Indeed, it seemed to me it was an issue quite difficult to solve. But, it is something very unlikely to happen in real programs and, so far, nobody has encountered these problems. I have built these examples when I have suspected that something may be wrong in some cases and this is not actual code in some program I have written.
Re: cpuTime not in JS backend?
Also DOM package does not include performance.now which requires and {.emit.}
to get working.
Re: How to cross-compile a Nim executable for Android
Hmm, I'm not sure, all I can say is the cross compiler cannot find the sysroot This the exact command line I did and it success \nimcache>arm-linux-androideabi-gcc -I d:/installer/nim/lib hello_android.c stdlib_system.c -o hello --sysroot=e:/installer/android/ndk/platforms/android-19/arch-arm Before I did failed like what you had but because I wrote the sysroot wrong, before I wrote it `--sysroot=e:/installer/ndk/platforms/android-19/arch-arm` , but after recompiled with correct path, it compiled successfully. My Nim version is still 0.17.2, 64 bit (haven't had a chance to try 0.18.0) My arm-linux-androideabi-gcc version and its path dependency arm-linux-androideabi-gcc -v Using built-in specs. COLLECT_GCC=arm-linux-androideabi-gcc COLLECT_LTO_WRAPPER=e:/installer/android/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/../libexec/gcc/arm-linux-androideabi/4.9.x/lto-wrapper.exe Target: arm-linux-androideabi Configured with: /usr/local/google/buildbot/src/android/gcc/toolchain/build/../gcc/gcc-4.9/configure --prefix=/tmp/54f254f8bb7b48dd787052921220a87d --target=arm-linux-androideabi --host=x86_64-pc-mingw32msvc --build=x86_64-linux-gnu --with-gnu-as --with-gnu-ld --enable-languages=c,c++ --with-gmp=/buildbot/tmp/build/toolchain/temp-install --with-mpfr=/buildbot/tmp/build/toolchain/temp-install --with-mpc=/buildbot/tmp/build/toolchain/temp-install --with-cloog=/buildbot/tmp/build/toolchain/temp-install --with-isl=/buildbot/tmp/build/toolchain/temp-install --with-ppl=/buildbot/tmp/build/toolchain/temp-install --disable-ppl-version-check --disable-cloog-version-check --disable-isl-version-check --enable-cloog-backend=isl --with-host-libstdcxx='-static-libgcc -static-libstdc++ -lstdc++ -lm -static' --disable-libssp --enable-threads --disable-nls --disable-libmudflap --disable-libgomp --disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared --disable-tls --disable-libitm --with-float=soft --with-fpu=vfp --with-arch=armv5te --enable-target-optspace --enable-bionic-libs --enable-libatomic-ifuncs=no --enable-initfini-array --disable-nls --prefix=/tmp/54f254f8bb7b48dd787052921220a87d --with-sysroot=/tmp/54f254f8bb7b48dd787052921220a87d/sysroot --with-binutils-version=2.25 --with-mpfr-version=3.1.1 --with-mpc-version=1.0.1 --with-gmp-version=5.0.5 --with-gcc-version=4.9 --with-gdb-version=none --with-gxx-include-dir=/tmp/54f254f8bb7b48dd787052921220a87d/include/c++/4.9.x --with-bugurl=http://source.android.com/source/report-bugs.html --enable-languages=c,c++ --disable-bootstrap --enable-plugins --enable-libgomp --enable-gnu-indirect-function --disable-libsanitizer --enable-gold --enable-eh-frame-hdr-for-static --enable-graphite=yes --with-isl-version=0.11.1 --with-cloog-version=0.18.0 --with-arch=armv5te --program-transform-name='s&^&' --enable-gold=default Thread model: posix gcc version 4.9.x 20150123 (prerelease) (GCC) My system is Windows 10 64 bit
Re: How to cross-compile a Nim executable for Android
Hi mashingan, I tried cross-compile the same hello.nim from linux and **got the same errors exactly like in windows**. what I did: 1. Cloned nim-lang branch master from github and compled it. 2. Downloaded android ndk 3. Defined all needed paths in PATH 4. Compile hello.nim: nim c --cpu:arm --os:android --compileOnly hello.nim 5. Compile with arm-linux-androideabi-gcc.exe
Re: how to get value of object's field from second thread?
Thanks!
Re: how to get value of object's field from second thread?
You forgot `initLock`. Also since you just only toggle the boolean value, you may consider to use [cas](https://nim-lang.org/docs/system.html#cas,ptr.T,T,T)
Re: How to cross-compile a Nim executable for Android
> cd C:\Users\uname\Documents\nimapps\jnijava\ > set PATH=%PATH%;C:\Users\uname\Documents\apps\android-ndk-r16b\toolchains\arm-linux-androideabi-4.9\prebuilt\windows-x86_64\bin > nim c --cpu:arm --os:android --compileOnly hello.nim > cd nimcache > arm-linux-androideabi-gcc.exe -I "C:/Nim/lib" hello.c stdlib_system.c -o hello --sysroot="C:/Users/uname/Documents/apps/android-ndk-r16b/platforms/android-19/arch-arm"
Re: how to get value of object's field from second thread?
well, "\--threadAnalysis:off"+globalvar+lock looks nice:
import os, threadpool, locks
type
MyObj = ref object
flag: bool
var olock: Lock
var obj {.guard: olock.}: MyObj
proc someThread() {.gcsafe.} =
{.locks: [olock].}:
if obj != nil:
echo obj.flag
obj.flag = false
obj.new()
obj.flag = true
spawn someThread()
sleep 500
echo obj.flag
Re: How to cross-compile a Nim executable for Android
Could you give the command-line you typed? For example, what I did was like this arm-linux-androideabi-gcc.exe -I "C:/Nim/lib" hello.c stdlib_system.c -o hello --sysroot="C:/Users/uname/Documents/apps/android-ndk-r16b/platforms/android-19/arch-arm"
Re: How to cross-compile a Nim executable for Android
Hi mashingan, thank you for suggestion and I tried all this /," and // possibilities but errors are the same. any other suggestions? maybe I have not prepared some things...
Re: Nim syntax Quiz
"Error: Not all cases are covered" when you have one ')' too much? "Invalid indentation" when you have one ')' too much? Your "quiz" has quite some potential still.
Re: how to get value of object's field from second thread?
Thanks, I saw your examples in previous posts with similar theme (I've post
link before). Well, I did "simple" application, who demonstrate exchanging
process of object between two threads. This model looks it is logical, but code
looks really mad and inflexible (for 21th), sorry:
import os, threadpool
type
SharedChannel[T] = ptr Channel[T]
proc newSharedChannel[T](): SharedChannel[T] =
result = cast[SharedChannel[T]](allocShared0(sizeof(Channel[T])))
open(result[])
proc close[T](ch: var SharedChannel[T]) =
close(ch[])
deallocShared(ch)
ch = nil
proc send[T](ch: SharedChannel[T], content: T) =
ch[].send(content)
proc recv[T](ch: SharedChannel[T]): T =
result = ch[].recv
type
MyObj = ref object
flag: bool
proc someThread(ch: SharedChannel[MyObj]) {.thread.} =
var obj = ch.recv
if obj != nil:
echo obj.flag
obj.flag = false
ch.send(obj)
var
ch = newSharedChannel[MyObj]()
spawn someThread(ch)
var obj: MyObj
obj.new()
obj.flag = true
ch.send(obj)
sleep 500
obj = ch.recv
echo obj.flag
close(ch)
Now I'll figure out how best to integrate this model into the application.
Thanks for all for your help and discussion!
Re: Emscripten/WebAssembly GC considerations?
To complete the picture: the generated HTML file should be run with emrun main-wasm.html. To learn about GC behaviour in WASM, probably any Nim code for testing the GC (like the one from [here](https://forum.nim-lang.org/t/2646)) could be run in the browser. If someone already had some in-process code/method for e.g. detecting memory leaks for a 32-bit target, I would be interested.
Re: Nim syntax Quiz
On behalf of future Nim beginners I say that is a great reply to my rants. Correct and helpful feedback from compiler is even more important than correct and helpful feedback from community. When next version comes out, I'll check if there's room left for another syntax (error) "quiz".
Re: Emscripten/WebAssembly GC considerations?
@yglukhov Thanks, that makes sense, I can just call GC_step at the start of each emscripten_set_main_loop callback. By the way, thanks for writing jsbind, it has been very helpful! @mashingan I copied most of the nim.cfg from here: [https://forum.nim-lang.org/t/2991](https://forum.nim-lang.org/t/2991). Then follow the Emscripten installation instructions: [https://kripken.github.io/emscripten-site/docs/getting_started/downloads.html](https://kripken.github.io/emscripten-site/docs/getting_started/downloads.html) (be sure to source ./emsdk_env.sh in the console before using the Nim compiler). To compile, run something like nim c -d:emscripten -d:wasm -d:release -o:main-wasm.html main.nim and it will just.. work. If I have time, I'll put together a simple example repo. FYI, I could only get it to work on Linux (or Windows Linux), the Windows command prompt had some issues.
Re: Introducing loopfusion: loop over any number of sequences of any single type.
Done import loopfusion let a = @[1, 2, 3] let b = @[11, 12, 13] let c = @[10, 10, 10] forEach x in a, y in b, z in c: echo (x + y) * z # 120 # 140 # 160 # i is the iteration index [0, 1, 2] forEach i, x in a, y in b, z in c: d.add (x + y) * z * i # index: 0, 120 # index: 1, 140 # index: 2, 160 The tricky thing was the difference between typed and untyped macro. I can't do all in the same one. I have removed the ForEachIndexed and added it to forEach. It was a workaround because somehow I use overloading previously.
