Andreas Kling 131c3f50de LibJS: Add JS::SafeFunction, like Function but protects captures from GC ...

SafeFunction automatically registers its closure memory area in a place
where the JS garbage collector can find it.

This means that you can capture JS::Value and arbitrary pointers into
the GC heap in closures, as long as you're using a SafeFunction, and the
GC will not zap those values!

There's probably some performance impact from this, and there's a lot of
things that could be nicer/smarter about it, but let's build something
that ensures safety first, and we can worry about performance later. :^)

2022-09-24 12:23:29 +02:00

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