[NaCl SDK] Upate atomic ops in nacl_io

native_client_sdk/src/libraries/nacl_io/mount_node.h

 /* Copyright (c) 2012 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 LIBRARIES_NACL_IO_MOUNT_NODE_H_
 #define LIBRARIES_NACL_IO_MOUNT_NODE_H_
 
 #include <string>
 
 #include "nacl_io/error.h"
 #include "nacl_io/osstat.h"
 
 #include "sdk_util/ref_object.h"
 #include "sdk_util/scoped_ref.h"
+#include "sdk_util/simple_lock.h"
 
 struct dirent;
 struct stat;
 
 class Mount;
 class MountNode;
 
 typedef ScopedRef<MountNode> ScopedMountNode;
 
 // NOTE: The KernelProxy is the only class that should be setting errno. All
@@ skipping 64 matching lines @@
   // Find a child and return it without updating the refcount
   // Assumes that |out_node| is non-NULL.
   virtual Error FindChild(const std::string& name, ScopedMountNode* out_node);
 
   // Update the link count
   virtual void Link();
   virtual void Unlink();
 
  protected:
   struct stat stat_;
+  SimpleLock node_lock_;
 
   // We use a pointer directly to avoid cycles in the ref count.
   // TODO(noelallen) We should change this so it's unnecessary for the node
   // to track it's parent.  When a node is unlinked, the mount should do
   // any cleanup it needs.
   Mount* mount_;
 
   friend class Mount;
   friend class MountDev;
   friend class MountHtml5Fs;
   friend class MountHttp;
   friend class MountMem;
   friend class MountNodeDir;
 };
 
 #endif  // LIBRARIES_NACL_IO_MOUNT_NODE_H_