- Make sure to keep the main/control port opened until the

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 14 matching lines @@
  private:
   MessageHandler* handler_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageHandlerTask);
 };
 
 
 MessageHandler::MessageHandler()
     : queue_(new MessageQueue()),
       oob_queue_(new MessageQueue()),
+      control_ports_(0),
       live_ports_(0),
       pool_(NULL),
       task_(NULL),
       start_callback_(NULL),
       end_callback_(NULL),
       callback_data_(0) {
   ASSERT(queue_ != NULL);
   ASSERT(oob_queue_ != NULL);
 }
 
@@ skipping 217 matching lines @@
 
 
 void MessageHandler::decrement_live_ports() {
   MonitorLocker ml(&monitor_);
 #if defined(DEBUG)
   CheckAccess();
 #endif
   live_ports_--;
 }
 
+
+void MessageHandler::increment_control_ports() {
+  MonitorLocker ml(&monitor_);
+#if defined(DEBUG)
+  CheckAccess();
+#endif
+  control_ports_++;
+}
+
+
+void MessageHandler::decrement_control_ports() {
+  MonitorLocker ml(&monitor_);
+#if defined(DEBUG)
+  CheckAccess();
+#endif
+  control_ports_--;
+}
+
 }  // namespace dart