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import java.util.concurrent._
import java.util.concurrent.atomic._
object Test { def main(args: Array[String]) {
val n = 10000
val i = new AtomicInteger(n)
val j = new AtomicInteger(n)
val sum = new AtomicInteger
val q = new scala.concurrent.SyncVar[Int]
val producers = (1 to 3) map { z => new Thread {
override def run() {
var again = true
while (again) {
val x = i.getAndDecrement()
if (x > 0)
q put x
else
again = false
}
}
} }
val summers = (1 to 7) map { z => new Thread {
override def run() {
val x = j.decrementAndGet()
if (x >= 0) {
sum addAndGet q.take()
}
if (x > 0) {
run()
} else {
// done
}
}
} }
summers foreach { _.start() }
producers foreach { _.start() }
summers foreach { _.join() }
val got = sum.get
val expected = (n + 1) * n / 2
println(got + " " + expected + " " + (got == expected))
producers foreach { _.join() }
} }
// vim: set ts=2 sw=2 et:
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