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package examples
object boundedbuffer {
import concurrent.ops._
class BoundedBuffer[A](N: Int)(implicit m: ClassManifest[A]) {
var in, out, n = 0
val elems = new Array[A](N)
def await(cond: => Boolean) = while (!cond) { wait() }
def put(x: A) = synchronized {
await (n < N)
elems(in) = x; in = (in + 1) % N; n += 1
if (n == 1) notifyAll()
}
def get: A = synchronized {
await (n != 0)
val x = elems(out); out = (out + 1) % N ; n -= 1
if (n == N - 1) notifyAll()
x
}
}
def kill(delay: Int) = new java.util.Timer().schedule(
new java.util.TimerTask {
override def run() = {
println("[killed]")
System.exit(0)
}
},
delay) // in milliseconds
def main(args: Array[String]) {
val buf = new BoundedBuffer[String](10)
var cnt = 0
def produceString = { cnt += 1; cnt.toString() }
def consumeString(ss: String) = println(ss)
spawn { while (true) { val ssss = produceString; buf.put(ssss) } }
spawn { while (true) { val s = buf.get; consumeString(s) } }
kill(1000)
}
}
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