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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