isolates refactor: this change introduces 'dart:isolate' as a library. This is a

lib/isolate/runtime/isolateimpl.dart

Index: lib/isolate/runtime/isolateimpl.dart
diff --git a/lib/isolate/runtime/isolateimpl.dart b/lib/isolate/runtime/isolateimpl.dart
new file mode 100644
index 0000000000000000000000000000000000000000..e15dce2128459ce4b639743309bfe94444a52ae6
--- /dev/null
+++ b/lib/isolate/runtime/isolateimpl.dart
@@ -0,0 +1,36 @@
+// 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.
+
+
+// Dart isolate's API and implementation for the dartvm.

[siva, 2012/02/22 00:58:20]

I would prefer if we did not move this VM specific implementation out of the
runtime directory into this new 'lib/runtime' directory.

Currently all VM specific stuff is localized under 'runtime' and we have
followed a pattern that any code outside of that will use the dart API to access
the VM.

With your new organization we would have code outside the 'runtime' directory
that accesses the VM internals directly.

[Siggi Cherem (dart-lang), 2012/02/22 19:18:50]

Done. I moved this back under runtime/lib/

+
+class _IsolateNatives {
+  static Future<SendPort> spawn(Isolate isolate, bool isLight) {
+    Completer<SendPort> completer = new Completer<SendPort>();
+    SendPort port = _start(isolate, isLight);
+    completer.complete(port);
+    return completer.future;
+  }
+
+  // Starts a new isolate calling the run method on a new instance of the
+  // remote class's type.
+  // Returns the send port which is passed to the newly created isolate.
+  // This method is being dispatched to from the public core library code.
+  static SendPort _start(Isolate isolate, bool light)
+      native "IsolateNatives_start";
+}
+
+// This file seems incomplete, the vm build process will put together this with
+// isolate_api.dart, and runtime/ports.dart
+
+class _IsolateFactory {
+
+  factory Isolate2.fromCode(Function topLevelFunction) {
+    throw new NotImplementedException();
+  }
+
+  factory Isolate2.fromUri(String uri) {
+    throw new NotImplementedException();
+  }
+}