val ready = ConflatedBroadcastChannel<Boolean>(false)
fun onConnected() { ready.offer(true) }
fun onDisconnected() { ready.offer(false) }
suspend fun waitReady() = ready.consumeEach { if (it) return }

synchronized(lock)

async(UI)

java.lang.IllegalStateException: Already resumed, but got exception java.lang.IllegalMonitorStateException: did not lock monitor on object of type 'java.lang.Object' before unlocking

async

How to make the 100 iteration execute parallel?

availableCpu - 1

I mean maybe I will use some libraries in coroutines, but these libraries may contain

Thread.sleep

Thread.sleep

launch

Thread.sleep

Thead.sleep

delay

class MyRunner(val n: Int) {
    fun run() {
        doSomething()
        Thread.sleep(1000)
    }
}

fun main(args: Array<String>) {
    (1..100).forEach { n ->
        thread { 
            MyRunner(n).run()
        }
    }
}

class MyRunner(val n: Int) {
    suspend fun run() {
        doSomething()
        // delay(1000) // works as expected
        Thread.sleep(1000) // unexpected 
    }
}

fun main(args: Array<String>) {
    (1..100).forEach { n ->
        launch(CommonPool) {
            MyRunner(n).run()
        }
    }
    Thread.sleep(10000)
}

works as expected

unexpected

availableCpuCount - 1

delay(1000)

sleep

sleep

delay

sleep