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diff --git a/src/engine/events/PingQueuedEvent.h b/src/engine/events/PingQueuedEvent.h
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+++ b/src/engine/events/PingQueuedEvent.h
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+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om 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.
+ * 
+ * Om 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.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef PINGQUEUEDEVENT_H
+#define PINGQUEUEDEVENT_H
+
+#include "QueuedEvent.h"
+#include "util/types.h"
+#include "Responder.h"
+
+namespace Om {
+
+class Port;
+
+
+/** A "blocking" ping that travels through the event queue before responding.
+ *
+ * \ingroup engine
+ */
+class PingQueuedEvent : public QueuedEvent
+{
+public:
+	PingQueuedEvent(CountedPtr<Responder> responder) : QueuedEvent(responder) {}
+
+	void post_process() { m_responder->respond_ok(); }
+};
+
+
+} // namespace Om
+
+#endif // PINGQUEUEDEVENT_H