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package examples
object oneplacebuffer {
import scala.concurrent._;
class OnePlaceBuffer {
private val m = new MailBox() {} // An internal mailbox
private case class Empty() // Types of messages we deal with
private case class Full(x: Int)
m send Empty() // Initialization
def write(x: Int): Unit = m receive {
case Empty() =>
Console.println("put " + x)
m send Full(x)
}
def read: Int = m receive {
case Full(x) =>
Console.println("get " + x)
m send Empty(); x
}
}
def main(args: Array[String]) = {
val buf = new OnePlaceBuffer
val random = new java.util.Random()
def producer(n: int): unit = {
Thread.sleep(random.nextInt(1000))
buf.write(n)
producer(n + 1)
}
def consumer: unit = {
Thread.sleep(random.nextInt(1000))
val n = buf.read
consumer
}
def kill = new java.util.Timer().schedule(
new java.util.TimerTask {
override def run() = System.exit(0)
},
10000) // delay in milliseconds
ops.spawn(producer(0))
ops.spawn(consumer)
kill
}
}
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