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diff --git a/src/server/EnginePort.hpp b/src/server/EnginePort.hpp
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+++ b/src/server/EnginePort.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_ENGINE_ENGINE_PORT_HPP
+#define INGEN_ENGINE_ENGINE_PORT_HPP
+
+#include "raul/Deletable.hpp"
+#include "raul/Noncopyable.hpp"
+
+#include <boost/intrusive/slist.hpp>
+
+#include "DuplexPort.hpp"
+
+namespace ingen {
+namespace server {
+
+/** A "system" port (e.g. a Jack port, an external port on Ingen).
+ *
+ * @ingroup engine
+ */
+class EnginePort : public Raul::Noncopyable
+                 , public Raul::Deletable
+                 , public boost::intrusive::slist_base_hook<>
+{
+public:
+	explicit EnginePort(DuplexPort* port)
+		: _graph_port(port)
+		, _buffer(nullptr)
+		, _handle(nullptr)
+		, _driver_index(0)
+	{}
+
+	void set_buffer(void* buf)            { _buffer = buf; }
+	void set_handle(void* buf)            { _handle = buf; }
+	void set_driver_index(uint32_t index) { _driver_index = index; }
+
+	void*       buffer()       const { return _buffer; }
+	void*       handle()       const { return _handle; }
+	uint32_t    driver_index() const { return _driver_index; }
+	DuplexPort* graph_port()   const { return _graph_port; }
+	bool        is_input()     const { return _graph_port->is_input(); }
+
+protected:
+	DuplexPort* _graph_port;
+	void*       _buffer;
+	void*       _handle;
+	uint32_t    _driver_index;
+};
+
+} // namespace server
+} // namespace ingen
+
+#endif // INGEN_ENGINE_ENGINE_PORT_HPP