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diff --git a/src/server/ProcessSlave.hpp b/src/server/ProcessSlave.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_ENGINE_PROCESSSLAVE_HPP
+#define INGEN_ENGINE_PROCESSSLAVE_HPP
+
+#include <sstream>
+
+#include "raul/Array.hpp"
+#include "raul/AtomicInt.hpp"
+#include "raul/Slave.hpp"
+
+#include "Driver.hpp"
+#include "Engine.hpp"
+#include "ProcessContext.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class NodeImpl;
+class CompiledPatch;
+
+class ProcessSlave : protected Raul::Slave {
+public:
+	ProcessSlave(Engine& engine, bool realtime)
+		: _engine(engine)
+		, _id(_next_id++)
+		, _index(0)
+		, _state(STATE_FINISHED)
+		, _compiled_patch(NULL)
+		, _context(NULL)
+	{
+		std::stringstream ss;
+		ss << "Process Slave ";
+		ss << _id;
+		set_name(ss.str());
+
+		start();
+
+		if (realtime)
+			set_scheduling(SCHED_FIFO, 40);
+	}
+
+	~ProcessSlave() {
+		stop();
+	}
+
+	inline void whip(CompiledPatch*  compiled_patch,
+	                 uint32_t        start_index,
+	                 ProcessContext& context)
+	{
+		assert(_state == STATE_FINISHED);
+		_index          = start_index;
+		_state          = STATE_RUNNING;
+		_compiled_patch = compiled_patch;
+		_context        = &context;
+
+		Raul::Slave::whip();
+	}
+
+	inline void finish() {
+		while (_state.get() != STATE_FINISHED)
+			_state.compare_and_exchange(STATE_RUNNING, STATE_FINISH_SIGNALLED);
+	}
+
+	inline uint32_t              id()      const { return _id; }
+	inline const ProcessContext& context() const { return _engine.driver()->context(); }
+	inline       ProcessContext& context()       { return _engine.driver()->context(); }
+
+private:
+	void _whipped();
+
+	static uint32_t _next_id;
+
+	static const int STATE_RUNNING          = 0;
+	static const int STATE_FINISH_SIGNALLED = 1;
+	static const int STATE_FINISHED         = 2;
+
+	Engine&         _engine;
+	uint32_t        _id;
+	uint32_t        _index;
+	Raul::AtomicInt _state;
+	CompiledPatch*  _compiled_patch;
+	ProcessContext* _context;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_PROCESSSLAVE_HPP