On Mon, Mar 7, 2016 at 9:50 AM, Andrii Heonia <[email protected]> wrote:

> This is demo with global callback:
> https://github.com/AndriiHeonia/async-emcc/tree/7207aebdcc65b5d183f1a26516ccdd77eb06ce8e
>  and
> it also doesn't work. My callback dies before async call even if it is
> global (and I don't get how to keep it alive)
>

Yeah, I'm seeing the same thing with this example, can't quite see what's
forcing the object to get deleted after the sync call code-path. Seems the
same if I switch from raw pointers to std::shared_ptr...

Andrii, if you can't get this worked out I would recommend switching from
storing the Callback in a C++ global to instantiating an App object from
the JS side and letting the Callback instance live as a member variable in
the App instance.

This should allow you to control the lifetime of the App instance from the
JS side more explicitly (eg, it should stay alive until you explicitly
destroy it from JS).

-- brion

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