Separate EventSource interface from EventQueue implementation.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4316 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 61 insertions, 0 deletions

diff --git a/src/server/EventQueue.hpp b/src/server/EventQueue.hpp
new file mode 100644
index 00000000..e1adbd6b
--- /dev/null
+++ b/src/server/EventQueue.hpp
@@ -0,0 +1,61 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_ENGINE_EVENTQUEUE_HPP
+#define INGEN_ENGINE_EVENTQUEUE_HPP
+
+#include "raul/AtomicPtr.hpp"
+#include "raul/Slave.hpp"
+
+#include "EventSource.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class Event;
+class PostProcessor;
+class ProcessContext;
+
+/** An EventSource which prepares events in its own thread.
+ */
+class EventQueue : public EventSource
+                 , public Raul::Slave
+{
+public:
+	explicit EventQueue();
+	virtual ~EventQueue();
+
+	void process(PostProcessor& dest, ProcessContext& context, bool limit=true);
+
+	inline bool unprepared_events() const { return _prepared_back.get(); }
+	inline bool empty()             const { return !_head.get(); }
+
+protected:
+	void push_queued(Event* const ev);
+
+	virtual void _whipped(); ///< Prepare 1 event
+
+private:
+	Raul::AtomicPtr<Event> _head;
+	Raul::AtomicPtr<Event> _prepared_back;
+	Raul::AtomicPtr<Event> _tail;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_EVENTQUEUE_HPP
+