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diff --git a/libs/ardour/ardour/rt_tasklist.h b/libs/ardour/ardour/rt_tasklist.h
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+++ b/libs/ardour/ardour/rt_tasklist.h
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+/*
+ * Copyright (C) 2017 Robin Gareus <robin@gareus.org>
+ *
+ * This program 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.
+ *
+ * This program 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 more 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef _ardour_rt_tasklist_h_
+#define _ardour_rt_tasklist_h_
+
+#include <list>
+#include <boost/function.hpp>
+
+#include "pbd/semutils.h"
+
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
+#include "ardour/audio_backend.h"
+#include "ardour/session_handle.h"
+
+namespace ARDOUR {
+
+class LIBARDOUR_API RTTaskList
+{
+public:
+	RTTaskList ();
+	~RTTaskList ();
+
+	// TODO use dedicated allocator of a boost::intrusive::list
+	typedef std::list<boost::function<void ()> > TaskList;
+
+	/** process tasks in list in parallel, wait for them to complete */
+	void process (TaskList const&);
+
+private:
+	gint _threads_active;
+	std::vector<pthread_t> _threads;
+
+	void reset_thread_list ();
+	void drop_threads ();
+
+	void process_tasklist ();
+
+	static void* _thread_run (void *arg);
+	void run ();
+
+	Glib::Threads::Mutex _process_mutex;
+	Glib::Threads::Mutex _tasklist_mutex;
+	PBD::Semaphore _task_run_sem;
+	PBD::Semaphore _task_end_sem;
+
+	TaskList _tasklist;
+};
+
+} // namespace ARDOUR
+#endif