Maybe missing rb_fiber_current?

[ioquatix]

It compiles, but fails:

https://github.com/socketry/event/runs/3063384404#step:5:63

1) Event::Selector::EPoll behaves like queue #push defers push during push to next iteration
		Failure/Error: subject.yield

		RuntimeError:
			External LLVMFunction rb_fiber_current cannot be found. (com.oracle.truffle.llvm.runtime.except.LLVMLinkerException)
			Translated to internal error
		Shared Example Group: "queue" called from ./spec/event/selector/queue_spec.rb:
		# ./ext/event/selector/selector.c:153:in `Event_Selector_wait_and_transfer'
		# ./ext/event/selector/selector.h:117:in `Event_Selector_yield'
		# ./ext/event/selector/epoll.c:130:in `Event_Selector_EPoll_yield'
		# /home/runner/.rubies/truffleruby-head/lib/truffle/truffle/cext_ruby.rb:41:in `yield'
		# ./spec/event/selector/queue_spec.rb:52:in `block (4 levels) in <top (required)>'

[ioquatix]

It seems like we have it?

truffleruby/lib/cext/include/ruby/intern.h

Line 250 in 5f4a462

VALUE rb_fiber_current(void);

[eregon]

truffleruby/lib/cext/include/ruby/intern.h

Line 250 in 5f4a462

VALUE rb_fiber_current(void);

is just the prototype, this error means there is no actual definition of the rb_fiber_current() function.

So we should add it, @bjfish could you do that?

[eregon]

Note that if you use have_func('rb_fiber_current') it should correctly find out that it's not available on TruffleRuby (until we add it).

[ioquatix]

Thanks, sorry, I didn't realise this was needed. I can add it.

[eregon]

Thanks, sorry, I didn't realise this was needed. I can add it.

It's just a good way to workaround if the function is not available, but we'll add it soon anyway (if you use truffleruby-head).

We noticed other rb_fiber_* functions are also not defined currently on TruffleRuby and will add those too.

[bjfish]

This is now implemented at: 06bc34f. Thank you for reporting this.