1 files changed, 73 insertions, 0 deletions
diff --git a/src/server/EventSource.hpp b/src/server/EventSource.hpp
new file mode 100644
index 00000000..19d87ed9
--- /dev/null
+++ b/src/server/EventSource.hpp
@@ -0,0 +1,73 @@
+/* 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_EVENTSOURCE_HPP
+#define INGEN_ENGINE_EVENTSOURCE_HPP
+
+#include "raul/Semaphore.hpp"
+#include "raul/Slave.hpp"
+#include "raul/List.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class Event;
+class QueuedEvent;
+class PostProcessor;
+class ProcessContext;
+
+/** Source for events to run in the audio thread.
+ *
+ * The Driver gets events from an EventSource in the process callback
+ * (realtime audio thread) and executes them, then they are sent to the
+ * PostProcessor and finalised (post-processing thread).
+ */
+class EventSource : protected Raul::Slave
+{
+public:
+	explicit EventSource(size_t queue_size);
+	virtual ~EventSource();
+
+	void process(PostProcessor& dest, ProcessContext& context, bool limit=true);
+
+	bool empty() { return _events.empty(); }
+
+	/** Signal that a blocking event is finished.
+	 *
+	 * This MUST be called by blocking events in their post_process() method
+	 * to resume pre-processing of events.
+	 */
+	inline void unblock() { _blocking_semaphore.post(); }
+
+protected:
+	void push_queued(QueuedEvent* const ev);
+
+	inline bool unprepared_events() { return (_prepared_back.get() != NULL); }
+
+	virtual void _whipped(); ///< Prepare 1 event
+
+private:
+	Raul::List<Event*>                        _events;
+	Raul::AtomicPtr<Raul::List<Event*>::Node> _prepared_back;
+	Raul::Semaphore                           _blocking_semaphore;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_EVENTSOURCE_HPP
+