noExitRuntime and shutting down emscripten runtime

[Christopher Dyken]

Hi,

I use emscripten for a project where I set noExitRuntime=1 since I want to manage the main loop myself in javascript-land. And that works well.

However, I also need to shut down and clean up the module, but I haven't managed to find a way to invoke the shutdown code?

I'm considering trying to do the init code in a dedicated function using noInitialRun=1 and call main() for shutdown. But maybe I am missing something?

Thanks,

Christopher

[Sam Clegg]

You should be able to set `noExitRuntime = 0` and then call `exit(0)` (or `Module.exit(0)`).   

cheers,

sam

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[Christopher Dyken]

Thanks for your reply!

But if I clear `noExitRuntime`, then exiting `main()` will shut down the runtime as well?

I tried at init:
- set`noExitRuntime=0` and `noInitialRun=1`
- move the body of my `main()` into an init function and let `main()` have an empty body
- invoke my init function at end of `postRun`

Then the main-loop runs in javascript.

And then when shutting down:

- run `callMain()`

This appears to work as I want, application seems to get events and rendering works, and event handlers seem to be cleaned up when shutting down.

Thanks,

Christopher

[Sam Clegg]

On Tue, Mar 23, 2021 at 2:51 AM Christopher Dyken <christop...@gmail.com> wrote:

Thanks for your reply!

But if I clear `noExitRuntime`, then exiting `main()` will shut down the runtime as well?

I meant set `noExitRuntime=1` at startup, and then when you want to exit you can set it to `0` before calling `exit()`.

Actually we have a special function that does basically this: `emscripten_force_exit()`

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[Christopher Dyken]

Thanks, that looks like precisely what I was looking for!