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There is no counting semaphore in coroutines yet right? Only `Mutex`?

As a FYI I’m trying to limit concurrency due to memory constraints. Was planning on using a semaphore for that

I could use a worker pool but for now that would be overkill

As a temporary workaround you can use `Channel&lt;Unit&gt;(permits)` as a semaphore

Right. And it would never block when putting a permit back since there doesn’t exist more permits than the buffer size

You can also limit work using the fan-out method

<https://kotlinlang.org/docs/reference/coroutines/channels.html#fan-out>