FinalizerCallbacks and threads

[audetto]

I have finally got my c++ addon to correctly memory manage wrapped objects.

What I learned is that the callbacks can only run when the main thread "yields" (e.g. via a setTimeout call) (there is a discussion here https://github.com/orgs/nodejs/discussions/47716).

In plain javascript, this is probably as far as one can go, but I was wondering if using the node (addon) api either of the following items are possible

1. flag the callback as "threadsafe" so node will run it immediately, rather than schedule it for later
   • no need to callback into node (I just need delete ptr)
2. tell node to "run all pending callbacks" via a faster node api call
   • as opposed to a await sleep(0) which is not that fast, and makes everything into an async

?

[KevinEady]

This functionality would need to be addressed in the changes we're discussin to the SetImmediate finalizer functionality.

Relates: #1140

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.