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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(), Full(x: Int); // Types of messages we deal with
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
}
ops.spawn(producer(0));
ops.spawn(consumer)
}
}
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