I'm looking for a coroutine equivalent of CountdownLatch (even just for the most basic n=1 case) where one coroutine can block until another coroutine says it can go. What am I looking for?

for

n=1

, I think mutex is sufficient

thanks, that sounds good.

I made a quick + dirty implementation https://gist.github.com/octylFractal/fd86b67bbdbf61f02c853142aced0534

I direct equivalent is a

CompletableDeferred

. Okay... Somewhat direct. If n =1.

@octylFractal I dunno that MutableSet is thread-safe?

well, I did say it was quick and dirty :P you can likely replace it with CopyOnWriteArraySet for little performance loss

Personally I’d use a rendezvous channel to effectively “trigger” the listening coroutine from the controlling coroutine but that’s just my opinion 🙃