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kotlinlang

Developers are recommended to use non-suspend `fun CoroutineScope.xxxAsync()` for functions that launch something and return immediately, and `suspend fun xxx()` for functions that suspend/block until all of their execution completes.
Much of the kotlinx.coroutines API uses lambdas that are suspend and have a `CoroutineScope` receiver. The `CoroutineScope` allows developers to write coroutines with cancellability in mind - by checking `isActive`. What's the best way to get access to this in a `suspend fun`?

I suppose you can use `coroutineContext[Job]!!.isActive`, but this is more ugly. Maybe use `coroutineScope { }` if it's needed?

Use `coroutineScope`. For your use case though, maybe all you need is `coroutineContext.ensureActive()` so it throws the `CancellationException` in tight loops?