- Add possibility to redirect messages if they were not delivered.

runtime/vm/message.cc

 // 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.
 
 #include "vm/message.h"
 
+#include "vm/port.h"
+
 namespace dart {
 
+bool Message::RedirectToDeliveryFailurePort() {
+  if (delivery_failure_port_ == kIllegalPort) {
+    return false;
+  }
+  dest_port_ = delivery_failure_port_;
+  delivery_failure_port_ = kIllegalPort;
+  return true;
+}
+
+
 MessageQueue::MessageQueue() {
   head_ = NULL;
   tail_ = NULL;
 }
 
 
 MessageQueue::~MessageQueue() {
   // Ensure that all pending messages have been released.
   Clear();
   ASSERT(head_ == NULL);
@@ skipping 33 matching lines @@
   return NULL;
 }
 
 
 void MessageQueue::Clear() {
   Message* cur = head_;
   head_ = NULL;
   tail_ = NULL;
   while (cur != NULL) {
     Message* next = cur->next_;
-    delete cur;
+    if (cur->RedirectToDeliveryFailurePort()) {
+      PortMap::PostMessage(cur);
+    } else {
+      delete cur;
+    }
     cur = next;
   }
 }
 
 
 }  // namespace dart