Emscripten: Usage of Runtime.addFunction not clear

[hcomere]

Hello,

I am trying to get a JS function pointer using Module.Runtime.addFunction as specified in doc :
https://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#calling-javascript-functions-as-function-pointers-from-c

    var pointer = Module.Runtime.addFunction(function(stateCode) { 
            console.log("State change ! " + stateCode); 
        });

    Module.ccall('set_state_change_callback', 'number', ['number'], [pointer]);

I have added to emcc requested setting :

 -s RESERVED_FUNCTION_POINTERS=10

But i still get a JS exception

TypeError: Module.Runtime is undefined

Usage exemple https://github.com/kripken/emscripten/blob/1.29.12/tests/test_core.py#L6237 does not help me to understand what is going wrong with my code.

Any hint and clarification please ? :)

Regards,
Harold

[kripken]

Looking in the generated code might help, to see why Module.Runtime doesn't exist - although I think we might just not export it by default on the Module object. But you should be able to access the Runtime object directly (no Module.), unless you built with an option like MODULARIZE (or, even with that option, if your handwritten code is in a pre- or post-js, as those are included with the code in the module).

[hcomere]

Ok, my bad.

Runtime variable is well defined in generated code.

I just called Runtime.addFunction in a "script" tag after the "script async" tag including generated .js.
So my "script" tag is evaluated before that the "script async" has finished to load and therefore Runtime was not defined.

Using --post-js to include the code into the generated .js as you suggested solve the issue, thank you !

Regards,
Harold

[joextodd]

For new people here from Google, the Runtime object was removed in v1.37.27. You just need to remove the Runtime. prefix.

See FAQ