There is no counting semaphore in coroutines yet right Only kotlinlang #coroutines

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ansman

04/17/2019, 1:50 PM

There is no counting semaphore in coroutines yet right? Only

Mutex

Vsevolod Tolstopyatov [JB]

04/17/2019, 1:54 PM

Not yet, but it is in work, PR #1101

💯 2

👏 2

ansman

04/17/2019, 1:54 PM

Great, thanks!

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

Vsevolod Tolstopyatov [JB]

04/17/2019, 2:02 PM

As a temporary workaround you can use

Channel<Unit>(permits)

as a semaphore

ansman

04/17/2019, 2:02 PM

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

withoutclass

04/17/2019, 2:13 PM

You can also limit work using the fan-out method

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

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