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diff --git a/src/server/PostProcessor.hpp b/src/server/PostProcessor.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_POSTPROCESSOR_HPP
+#define INGEN_ENGINE_POSTPROCESSOR_HPP
+
+#include <atomic>
+
+#include "ingen/ingen.h"
+
+#include "types.hpp"
+
+namespace ingen {
+namespace server {
+
+class Engine;
+class Event;
+class RunContext;
+
+/** Processor for Events after leaving the audio thread.
+ *
+ * The audio thread pushes events to this when it is done with them (which
+ * is realtime-safe), which signals the processing thread through a semaphore
+ * to handle the event and pass it on to the Maid.
+ *
+ * Update: This is all run from main_iteration now to solve scripting
+ * thread issues.  Not sure if this is permanent/ideal or not...
+ *
+ * \ingroup engine
+ */
+class INGEN_API PostProcessor
+{
+public:
+	explicit PostProcessor(Engine& engine);
+	~PostProcessor();
+
+	/** Push a list of events on to the process queue.
+	    realtime-safe, not thread-safe.
+	*/
+	void append(RunContext& context, Event* first, Event* last);
+
+	/** Post-process and delete all pending events */
+	void process();
+
+	/** Return true iff any events are pending */
+	bool pending() const;
+
+	/** Set the latest event time that should be post-processed */
+	void set_end_time(FrameTime time) { _max_time = time; }
+
+private:
+	Engine&                _engine;
+	std::atomic<Event*>    _head;
+	std::atomic<Event*>    _tail;
+	std::atomic<FrameTime> _max_time;
+};
+
+} // namespace server
+} // namespace ingen
+
+#endif // INGEN_ENGINE_POSTPROCESSOR_HPP