Hi, does anybody know if there's up-to-date docume...

# kotlin-native

[stoyicker]

Hi, does anybody know if there's up-to-date documentation on the relationship between coroutines and dispatch queues? I am using a native API that requires a dispatch queue and I would like to provide one based on the current coroutine context. Unfortunately I have no clue on how to do this because all documentation I find is about the old memory model

[natario1]

A CoroutineDispatcher may not be backed by a dispatch queue. The only way I see to get a dispatch queue out of a dispatcher, is to create your own dispatcher implementation with a queue member variable.

(Not sure about documentation links)

[stoyicker]

mm that's a little unfortunate, I think it would be a reasonable expectation to have from the framework, but I guess it is what it is

[stoyicker]

thanks anyway

[Jeff Lockhart]

I created this extension function to use in my library to get a dispatch queue for a coroutine dispatcher. It either returns the main dispatch queue for the main coroutine dispatcher, or else creates a serial dispatch queue to use for any other coroutine dispatcher.

Note, this solution is somewhat fragile and relies on assumptions with how it's used. It may create a new dispatch queue each time it's called. But if you only call it once for a given usage, as I'm doing in my library, it does at least handle the case of getting a valid serial dispatch queue for either main or background work, depending on the coroutine context.