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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