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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave 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 EVENT_H
+#define EVENT_H
+
+#include <cassert>
+#include <raul/SharedPtr.hpp>
+#include <raul/Deletable.hpp>
+#include "interface/Responder.hpp"
+#include "types.hpp"
+#include "ThreadManager.hpp"
+
+namespace Raul { class Path; }
+using Raul::Path;
+
+using Ingen::Shared::Responder;
+
+namespace Ingen {
+
+class Engine;
+
+
+/** Base class for all events (both realtime and QueuedEvent).
+ *
+ * This is for time-critical events like note ons. There is no non-realtime
+ * pre-execute method as in QueuedEvent's, any lookups etc need to be done in the
+ * realtime execute() method.
+ *
+ * QueuedEvent extends this class with a pre_process() method for any work that needs
+ * to be done before processing in the realtime audio thread.
+ *
+ * \ingroup engine
+ */
+class Event : public Raul::Deletable
+{
+public:
+ virtual ~Event() {}
+
+ /** Execute this event in the audio thread (MUST be realtime safe). */
+ virtual void execute(SampleCount nframes, FrameTime start, FrameTime end)
+ {
+ assert(ThreadManager::current_thread_id() == THREAD_PROCESS);
+ assert(!_executed);
+ assert(_time <= end);
+
+ // Missed the event, jitter, damnit.
+ if (_time < start)
+ _time = start;
+
+ _executed = true;
+ }
+
+ /** Perform any actions after execution (ie send replies to commands)
+ * (no realtime requirements). */
+ virtual void post_process()
+ {
+ assert(ThreadManager::current_thread_id() == THREAD_POST_PROCESS);
+ }
+
+ inline SampleCount time() { return _time; }
+
+protected:
+ Event(Engine& engine, SharedPtr<Shared::Responder> responder, FrameTime time)
+ : _engine(engine)
+ , _responder(responder)
+ , _time(time)
+ , _executed(false)
+ {}
+
+ Engine& _engine;
+ SharedPtr<Shared::Responder> _responder;
+ FrameTime _time;
+ bool _executed;
+};
+
+
+} // namespace Ingen
+
+#endif // EVENT_H