2 files changed, 26 insertions, 0 deletions
diff --git a/intern/cycles/graph/node.cpp b/intern/cycles/graph/node.cpp
index c437c6fda1e..14e66959f4f 100644
--- a/intern/cycles/graph/node.cpp
+++ b/intern/cycles/graph/node.cpp
@@ -26,10 +26,16 @@ CCL_NAMESPACE_BEGIN
 
 /* Node Type */
 
+NodeOwner::~NodeOwner()
+{
+}
+
 Node::Node(const NodeType *type_, ustring name_) : name(name_), type(type_)
 {
   assert(type);
 
+  owner = nullptr;
+
   /* assign non-empty name, convenient for debugging */
   if (name.empty()) {
     name = type->name;
@@ -679,4 +685,14 @@ bool Node::is_a(const NodeType *type_)
   return false;
 }
 
+const NodeOwner *Node::get_owner() const
+{
+  return owner;
+}
+
+void Node::set_owner(const NodeOwner *owner_)
+{
+  owner_ = owner;
+}
+
 CCL_NAMESPACE_END
diff --git a/intern/cycles/graph/node.h b/intern/cycles/graph/node.h
index 4473b8aca28..3c84dbdb4a7 100644
--- a/intern/cycles/graph/node.h
+++ b/intern/cycles/graph/node.h
@@ -31,6 +31,10 @@ struct Transform;
 
 /* Node */
 
+struct NodeOwner {
+  virtual ~NodeOwner();
+};
+
 struct Node {
   explicit Node(const NodeType *type, ustring name = ustring());
   virtual ~Node() = 0;
@@ -99,6 +103,12 @@ struct Node {
 
   ustring name;
   const NodeType *type;
+
+  const NodeOwner *get_owner() const;
+  void set_owner(const NodeOwner *owner_);
+
+ protected:
+  const NodeOwner *owner;
 };
 
 CCL_NAMESPACE_END