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diff --git a/src/server/EngineStore.hpp b/src/server/EngineStore.hpp
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+/* This file is part of Ingen.
+ * Copyright 2007-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef INGEN_ENGINE_OBJECTSTORE_HPP
+#define INGEN_ENGINE_OBJECTSTORE_HPP
+
+#include "raul/SharedPtr.hpp"
+
+#include "shared/Store.hpp"
+
+namespace Ingen {
+
+class GraphObject;
+
+namespace Server {
+
+class PatchImpl;
+class NodeImpl;
+class PortImpl;
+class GraphObjectImpl;
+
+/** Storage for all GraphObjects (tree of GraphObject's sorted by path).
+ *
+ * All looking up in pre_process() methods (and anything else that isn't in-band
+ * with the audio thread) should use this (to read and modify the GraphObject
+ * tree).
+ *
+ * Searching with find*() is fast (O(log(n)) binary search on contiguous
+ * memory) and realtime safe, but modification (add or remove) are neither.
+ */
+class EngineStore : public Ingen::Shared::Store
+{
+public:
+	PatchImpl*       find_patch(const Raul::Path& path);
+	NodeImpl*        find_node(const Raul::Path& path);
+	PortImpl*        find_port(const Raul::Path& path);
+	GraphObjectImpl* find_object(const Raul::Path& path);
+
+	void add(Ingen::GraphObject* o);
+	void add(const Objects& family);
+
+	SharedPtr<Objects> remove(const Raul::Path& path);
+	SharedPtr<Objects> remove(Objects::iterator i);
+	SharedPtr<Objects> remove_children(const Raul::Path& path);
+	SharedPtr<Objects> remove_children(Objects::iterator i);
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // OBJECTSTORE