export ANDROID_NDK_HOME=/path/to/Android/Sdk/android-ndk-r25b
make update
make mobile
You need to have the android platform tools installed somewhere and the emulator running
adb root
adb push ./build/androidmobile /data/androidmobile
This is required to see the echo output. You need to have the android platform tools installed somewhere and the emulator running
# Execute in a separate terminal window
adb logcat
adb shell
# Then in the android emulator terminal
su
chmod 777 /data/androidmobile
/data/androidmobile
In main.nim if you use await ctx.signal.wait(), in logcat you will see the following output:
04-24 09:43:46.459 1101 1101 V nim : ::::::: Sending signal
04-24 09:43:46.459 1101 1101 V nim : ::::::: Signal sent: true
04-24 09:43:46.460 1101 1102 V nim : ::::::: Waiting for Signal
Notice how the program is stuck waiting for a signal to be received. (It should have printed: ::::::: SUCCESS)
In the android terminal you'll see this error:
/home/richard/waku-org/threadsignal/main.nim(20) run
/home/richard/waku-org/threadsignal/vendor/nim-chronos/chronos/internal/asyncfutures.nim(660) waitFor
/home/richard/waku-org/threadsignal/vendor/nim-chronos/chronos/internal/asyncfutures.nim(635) pollFor
/home/richard/waku-org/threadsignal/vendor/nim-chronos/chronos/internal/asyncengine.nim(1031) poll
/home/richard/waku-org/threadsignal/vendor/nim-chronos/chronos/ioselects/ioselectors_poll.nim(226) selectInto2
/home/richard/waku-org/threadsignal/vendor/nimbus-build-system/vendor/Nim/lib/system/fatal.nim(54) sysFatal
Error: unhandled exception: value out of range: 1 notin 2147483648 .. 2147483647 [RangeDefect]
If you change main.nim to use discard ctx.signal.waitSync() instead, the execution will be succesful, and you'll see the following output in the terminal
04-24 09:41:10.172 1080 1080 V nim : ::::::: Sending signal
04-24 09:41:10.172 1080 1080 V nim : ::::::: Signal sent: true
04-24 09:41:10.173 1080 1081 V nim : ::::::: Waiting for Signal
04-24 09:41:10.173 1080 1081 V nim : ::::::: SUCCESS
04-24 09:41:10.173 1080 1081 V nim : ::::::: Waiting for Signal