Is it possible to wrap an async api based on polli...

# coroutines

[Dominaezzz]

Is it possible to wrap an async api based on polling (instead of callbacks) in a suspend function(or coroutine)? ...without another thread of course.
So only makeRequest(): Request, Request.isDone(): Boolean, Request.cancel() and Request.getResult(): Result are available.

[elizarov]

Yes. You can suspend the coroutine that is waiting for result, while launching another coroutine to poll periodically and resume the suspended one.

[elizarov]

Something like this:

suspend fun Request.await(): Result = suspendCancellableCoroutine<Result> { cont ->
    launch(cont.context) {
        while (true) {
            if (isDone()) {
                cont.resume(getResult())
                break
            }
            delay(100) // poll interval
        }
    }
}