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diff --git a/src/server/events/SetPortValue.hpp b/src/server/events/SetPortValue.hpp
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+++ b/src/server/events/SetPortValue.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_EVENTS_SETPORTVALUE_HPP
+#define INGEN_EVENTS_SETPORTVALUE_HPP
+
+#include "raul/Atom.hpp"
+#include "QueuedEvent.hpp"
+#include "types.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class PortImpl;
+
+namespace Events {
+
+/** An event to change the value of a port.
+ *
+ * This event can either be queued or immediate, depending on the queued
+ * parameter passed to the constructor.  It must be passed to the appropriate
+ * place (ie queued event passed to the event queue and non-queued event
+ * processed in the audio thread) or nasty things will happen.
+ *
+ * \ingroup engine
+ */
+class SetPortValue : public QueuedEvent
+{
+public:
+	SetPortValue(Engine&              engine,
+	             SharedPtr<Request>   request,
+	             bool                 queued,
+	             SampleCount          timestamp,
+	             const Raul::Path&    port_path,
+	             const Raul::Atom&    value);
+
+	SetPortValue(Engine&              engine,
+	             SharedPtr<Request>   request,
+	             SampleCount          timestamp,
+	             PortImpl*            port,
+	             const Raul::Atom&    value);
+
+	~SetPortValue();
+
+	void pre_process();
+	void execute(ProcessContext& context);
+	void post_process();
+
+private:
+	enum ErrorType {
+		NO_ERROR,
+		PORT_NOT_FOUND,
+		NO_SPACE,
+		TYPE_MISMATCH
+	};
+
+	void apply(Context& context);
+
+	bool             _queued;
+	const Raul::Path _port_path;
+	const Raul::Atom _value;
+	PortImpl*        _port;
+};
+
+} // namespace Server
+} // namespace Ingen
+} // namespace Events
+
+#endif // INGEN_EVENTS_SETPORTVALUE_HPP