Clojure to Scala, line by line

clojure-to-scala.scala

def slow = Thread.sleep(700)

def fast = Thread.sleep(100)

def threadDeliver[T](fun: => T, prom: SyncVar[T]) =
  actor { prom set fun }

def main[T](a: => T, aw: Long, b: => T, overall: Long, default: T): T = {
  val p = new SyncVar[T]
  threadDeliver(a, p)  
  p.get(aw) match {
    case Some(r) => r
    case None =>
      threadDeliver(b, p)
       p.get(overall - aw) match {
         case None => default
	 case Some(r) => r
       }
  }
}