other than keeping a blocking queue manually, dispatcher abstraction is meant for this I think

# coroutines

[ursus]

other than keeping a blocking queue manually, dispatcher abstraction is meant for this I think

[nulldev]

Use a Semaphore? https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.sync/-semaphore/

[nulldev]

Just start a coroutine for each upload and have each coroutine attempt to acquire the semaphore before starting the actual upload process.

[ursus]

Well ok. but I meant sharing the threads between disparchers basically

[Marko Mitic]

Just launch 5 coroutines on IO dispatcher, have them all read from one channel with download tasks/urls and that's all

[Marko Mitic]

You'll never use more than 5 threads and no threads will be kept alive just to idle

[Marko Mitic]

Roman had a talk on last KotlinConf showcasing solution for just this problem

[Marko Mitic]

This one

https://youtu.be/a3agLJQ6vt8▾

[ursus]

thanks!