Added API Dart_PostCMessage for posting a Dart_CMessage structure

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index b23cdb0242af685df616292a2cbd90d08f7a1bc9..3108b60e6eafc114fe69ea04528a768917e0f10f 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
@@ -730,6 +730,18 @@ DART_EXPORT bool Dart_PostIntArray(Dart_Port port_id,
 }
 
 
+DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* root) {
+  uint8_t* buffer = NULL;
+  MessageWriter writer(&buffer, allocator);
+
+  writer.WriteCMessage(root);
+
+  // Post the message at the given port.
+  return PortMap::PostMessage(new Message(
+      port_id, Message::kIllegalPort, buffer, Message::kNormalPriority));
+}
+
+
 DART_EXPORT bool Dart_Post(Dart_Port port_id, Dart_Handle handle) {
   Isolate* isolate = Isolate::Current();
   CHECK_ISOLATE(isolate);