- Add a minimal implementation of Capability.

runtime/vm/message_handler.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_handler.h"
 #include "vm/port.h"
 #include "vm/dart.h"
 
 namespace dart {
 
@@ skipping 137 matching lines @@
                 "\tport:       %" Pd64 "\n",
                 name(), message->dest_port());
     }
 
     // Release the monitor_ temporarily while we handle the message.
     // The monitor was acquired in MessageHandler::TaskCallback().
     monitor_.Exit();
     Message::Priority saved_priority = message->priority();
     result = HandleMessage(message);
     monitor_.Enter();
+    if (FLAG_trace_isolates) {
+      OS::Print("[.] Message handled:\n"
+                "\thandler:    %s\n"
+                "\tport:       %" Pd64 "\n",
+                name(), message->dest_port());
+    }
     if (!result) {
       // If we hit an error, we're done processing messages.
       break;
     }
     if (!allow_multiple_normal_messages &&
         saved_priority == Message::kNormalPriority) {
       // Some callers want to process only one normal message and then quit.
       break;
     }
     message = DequeueMessage(min_priority);
@@ skipping 131 matching lines @@
 
 void MessageHandler::decrement_control_ports() {
   MonitorLocker ml(&monitor_);
 #if defined(DEBUG)
   CheckAccess();
 #endif
   control_ports_--;
 }
 
 }  // namespace dart