Mutual exclusion between gconf and the glib main loop.

base/message_pump_glib.h

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MESSAGE_PUMP_GLIB_H_
 #define BASE_MESSAGE_PUMP_GLIB_H_
 
 #include <glib.h>
 
+#include "base/lock.h"
 #include "base/message_pump.h"
 #include "base/time.h"
 
 namespace base {
 
 // This class implements a MessagePump needed for TYPE_UI MessageLoops on
 // OS_LINUX platforms using GLib.
 class MessagePumpForUI : public MessagePump {
  public:
+  // A lock for mutual exclusion with the glib main loop, used for
+  // gconf in ProxyConfigServiceLinux.
+  static Lock glib_main_loop_lock_;
+
   MessagePumpForUI();
   ~MessagePumpForUI();
 
   virtual void Run(Delegate* delegate);
   virtual void Quit();
   virtual void ScheduleWork();
   virtual void ScheduleDelayedWork(const Time& delayed_work_time);
 
   // Internal methods used for processing the pump callbacks.  They are
   // public for simplicity but should not be used directly.  HandlePrepare
@@ skipping 41 matching lines @@
   int wakeup_pipe_read_;
   int wakeup_pipe_write_;
   GPollFD wakeup_gpollfd_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpForUI);
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_GLIB_H_