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diff --git a/src/libs/gui/ThreadedLoader.h b/src/libs/gui/ThreadedLoader.h
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave 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 THREADEDLOADER_H
+#define THREADEDLOADER_H
+
+#include <string>
+#include <list>
+#include <cassert>
+#include <boost/optional/optional.hpp>
+#include <raul/Thread.h>
+#include <raul/Slave.h>
+#include <raul/Mutex.h>
+#include <raul/Condition.h>
+#include "interface/EngineInterface.h"
+#include "client/PatchModel.h"
+#include "client/Serializer.h"
+#include "client/DeprecatedLoader.h"
+#include "serialisation/Loader.h"
+using std::string;
+using std::list;
+using boost::optional;
+
+using namespace Ingen::Client;
+using namespace Ingen::Serialisation;
+
+namespace Ingen {
+namespace GUI {
+
+
+/** Thread for loading patch files.
+ *
+ * This is a seperate thread so it can send all the loading message without
+ * blocking everything else, so the app can respond to the incoming events
+ * caused as a result of the patch loading, while the patch loads.
+ *
+ * Implemented as a slave with a list of closures (events) which processes
+ * all events in the (mutex protected) list each time it's whipped.
+ *
+ * \ingroup GUI
+ */
+class ThreadedLoader : public Raul::Slave
+{
+public:
+	ThreadedLoader(SharedPtr<EngineInterface> engine);
+	~ThreadedLoader();
+
+	// FIXME: there's a pattern here....
+	// (same core interface as Loader/Serializer)
+	
+	void load_patch(bool                    merge,
+	                const string&           data_base_uri,
+	                const Path&             data_path,
+	                MetadataMap             engine_data,
+	                optional<Path>          engine_parent,
+	                optional<const string&> engine_name = optional<const string&>(),
+	                optional<size_t>        engine_poly = optional<size_t>());
+	
+	void save_patch(SharedPtr<PatchModel> model, const string& filename, bool recursive);
+
+private:	
+
+	void save_patch_event(SharedPtr<PatchModel> model, const string& filename, bool recursive);
+	
+	/** Returns nothing and takes no parameters (because they have all been bound) */
+	typedef sigc::slot<void> Closure;
+
+	void _whipped();
+
+	SharedPtr<Glib::Module> _serialisation_module;
+
+	SharedPtr<EngineInterface> _engine;
+	SharedPtr<Loader>          _loader;
+
+	DeprecatedLoader _deprecated_loader;
+	Serializer       _serializer;
+	Raul::Mutex      _mutex;
+	list<Closure>    _events;
+};
+
+
+} // namespace GUI
+} // namespace Ingen
+
+#endif // LOADERRTHREAD_H