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diff --git a/src/server/Engine.hpp b/src/server/Engine.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_ENGINE_HPP
+#define INGEN_ENGINE_ENGINE_HPP
+
+#include <set>
+#include <vector>
+
+#include <boost/utility.hpp>
+
+#include "raul/SharedPtr.hpp"
+
+#include "ingen/EngineBase.hpp"
+
+namespace Raul { class Maid; }
+
+namespace Ingen {
+
+namespace Shared { class World; }
+
+namespace Server {
+
+class BufferFactory;
+class ClientBroadcaster;
+class ControlBindings;
+class Driver;
+class EngineStore;
+class EventSource;
+class MessageContext;
+class NodeFactory;
+class PostProcessor;
+class ProcessContext;
+
+/**
+   The engine which executes the process graph.
+
+   This is a simple class that provides pointers to the various components
+   that make up the engine implementation.  In processes with a local engine,
+   it can be accessed via the Ingen::Shared::World.
+
+   @ingroup engine
+*/
+class Engine : public boost::noncopyable, public EngineBase
+{
+public:
+	explicit Engine(Ingen::Shared::World* world);
+
+	virtual ~Engine();
+
+	virtual bool activate();
+
+	virtual void deactivate();
+
+	virtual void quit();
+
+	virtual bool main_iteration();
+
+	void set_driver(SharedPtr<Driver> driver);
+
+	void add_event_source(SharedPtr<EventSource> source);
+
+	void process_events(ProcessContext& context);
+
+	Ingen::Shared::World* world() const { return _world; }
+
+	ClientBroadcaster*    broadcaster()      const { return _broadcaster; }
+	BufferFactory*        buffer_factory()   const { return _buffer_factory; }
+	ControlBindings*      control_bindings() const { return _control_bindings; }
+	Driver*               driver()           const { return _driver.get(); }
+	Raul::Maid*           maid()             const { return _maid; }
+	MessageContext*       message_context()  const { return _message_context; }
+	NodeFactory*          node_factory()     const { return _node_factory; }
+	PostProcessor*        post_processor()   const { return _post_processor; }
+
+	SharedPtr<EngineStore> engine_store() const;
+
+	size_t event_queue_size() const;
+
+private:
+	Ingen::Shared::World* _world;
+
+	ClientBroadcaster* _broadcaster;
+	BufferFactory*     _buffer_factory;
+	ControlBindings*   _control_bindings;
+	SharedPtr<Driver>  _driver;
+	Raul::Maid*        _maid;
+	MessageContext*    _message_context;
+	NodeFactory*       _node_factory;
+	PostProcessor*     _post_processor;
+
+	typedef std::set< SharedPtr<EventSource> > EventSources;
+	EventSources _event_sources;
+
+	bool _quit_flag;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_ENGINE_HPP