1 files changed, 36 insertions, 0 deletions
diff --git a/docs/examples/boundedbuffer.scala b/docs/examples/boundedbuffer.scala
new file mode 100644
index 0000000000..983a3a7bf5
--- /dev/null
+++ b/docs/examples/boundedbuffer.scala
@@ -0,0 +1,36 @@
+package examples;
+
+object boundedbuffer {
+
+  import concurrent.ops._;
+
+  class BoundedBuffer[a](N: Int) {
+    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 = n + 1;
+      if (n == 1) notifyAll();
+    }
+
+    def get: a = synchronized {
+      await (n != 0);
+      val x = elems(out); out = (out + 1) % N ; n = n - 1;
+      if (n == N - 1) notifyAll();
+      x
+    }
+  }
+
+  def main(args: Array[String]) = {
+    val buf = new BoundedBuffer[String](10);
+    var cnt = 0;
+    def produceString = { cnt = cnt + 1; cnt.toString() }
+    def consumeString(ss: String) = System.out.println(ss);
+    spawn { while (true) { val ssss = produceString; buf.put(ssss) } }
+    spawn { while (true) { val s = buf.get; consumeString(s) } }
+  }
+
+}