1 files changed, 22 insertions, 0 deletions
diff --git a/examples/scala-js/tools/shared/src/main/scala/scala/scalajs/tools/env/ComJSRunner.scala b/examples/scala-js/tools/shared/src/main/scala/scala/scalajs/tools/env/ComJSRunner.scala
new file mode 100644
index 0000000..44302b8
--- /dev/null
+++ b/examples/scala-js/tools/shared/src/main/scala/scala/scalajs/tools/env/ComJSRunner.scala
@@ -0,0 +1,22 @@
+package scala.scalajs.tools.env
+
+trait ComJSRunner extends AsyncJSRunner {
+
+  /** Send a message to the JS VM. Throws if the message cannot be sent. */
+  def send(msg: String): Unit
+
+  /** Block until a message is received. Throws a [[ComClosedExcpetion]]
+   *  if the channel is closed before a message is received.
+   */
+  def receive(): String
+
+  /** Close the communication channel. Allows the VM to terminate if it is
+   *  still waiting for callback. The JVM side **must** call close in
+   *  order to be able to expect termination of the VM.
+   *
+   *  Calling [[stop]] on a [ComJSRunner]] automatically closes the
+   *  channel.
+   */
+  def close(): Unit
+
+}