Refactor isolate startup code in preparation for making isolate spawning more truly non-blocking.

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/dart.h"
 #include "vm/lockers.h"
 #include "vm/port.h"
 
@@ skipping 16 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),
       paused_(0),
       pause_on_start_(false),
       pause_on_exit_(false),
       paused_on_exit_(false),
       pool_(NULL),
       task_(NULL),
       start_callback_(NULL),
       end_callback_(NULL),
       callback_data_(0) {
@@ skipping 217 matching lines @@
   }
 }
 
 
 void MessageHandler::ClosePort(Dart_Port port) {
   MonitorLocker ml(&monitor_);
   if (FLAG_trace_isolates) {
     OS::Print("[-] Closing port:\n"
               "\thandler:    %s\n"
               "\tport:       %" Pd64 "\n"
-              "\tports:      control(%" Pd ") live(%" Pd ")\n",
-              name(), port, control_ports_, live_ports_);
+              "\tports:      live(%" Pd ")\n",
+              name(), port, live_ports_);
   }
 }
 
 
 void MessageHandler::CloseAllPorts() {
   MonitorLocker ml(&monitor_);
   if (FLAG_trace_isolates) {
     OS::Print("[-] Closing all ports:\n"
               "\thandler:    %s\n",
               name());
@@ skipping 13 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