First experimental steps towards a better story for JS interop.

lib/isolate/isolate_api.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class IsolateSpawnException implements Exception {
   const IsolateSpawnException(String this._s);
   String toString() => "IsolateSpawnException: '$_s'";
   final String _s;
 }
 
@@ skipping 72 matching lines @@
    * message to this send port with replyTo set to such receive port, and, when
    * a reply is received, it closes the receive port and completes the returned
    * future.
    */
   Future call(var message);
 
   /**
    * Tests whether [other] is a [SendPort] pointing to the same
    * [ReceivePort] as this one.
    */
-   bool operator==(var other);
+  bool operator==(var other);
 
   /**
    * Returns an immutable hash code for this send port that is
    * consistent with the == operator.
    */
   int hashCode();
 
 }
 
 /**
@@ skipping 29 matching lines @@
   void close();
 
   /**
    * Creates a new send port that sends to this receive port. It is legal to
    * create several [SendPort]s from the same [ReceivePort].
    */
   SendPort toSendPort();
 
 }
 
+// TODO(kasperl): Make this hashable and document it.
+interface SendPortSync {
+
+  callSync(var message);
+
+}
+
 /**
  * NOTE: This API will be deprecated soon.
  *
  * The [Isolate] class serves two purposes: (1) as template for spawning a new
  * isolate, and (2) as entry-point for the newly spawned isolate.
  *
  * New isolates are spawned by sub-classing [Isolate] and then invoking
  * [:spawn:] on the instance. This will spawn a new isolate, which creates a
  * new instance of the class, initializes the instance's [port] field
  * and invokes the instance method [main].
@@ skipping 74 matching lines @@
   /**
    * When isolates are created, an instance of the template's class is
    * instantiated in the new isolate. After the [port] has been set up, this
    * [main] method is invoked on the instance.
    */
   abstract void main();
 
   final bool _isLight;
   ReceivePort _port;
 }