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include/platform/messaging/messaging.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__MESSAGING__
+#define	__MESSAGING__
+
+
+		#include "container/nlist.h"
+
+
+namespace GS {
+	namespace Messaging {
+
+/*!
+	@short	Low-level message broadcasting system.
+	@author	Emmanuel Julien (ejulien@nworks.fr)
+*/
+template <class Message, class Listener, class From, class Parm = void *> class Broadcaster
+{
+protected:
+
+		/// Message listener list.
+		List <Listener *> listener_list;
+
+public:
+
+		bool		RegisterMessageListener(Listener *listener)
+		{	return listener_list.Add(listener) ? true : false;	}
+		bool		UnregisterMessageListener(Listener *listener)
+		{	return listener_list.Remove(listener);	}
+
+virtual	void		BroadcastMessage(const Message &msg, const From &from, const Parm &parm)
+		{
+			ListForeachPtr(Listener *, listener, listener_list)
+				listener->ProcessMessage(msg, from, parm);
+		}
+
+virtual ~Broadcaster() {}
+};
+
+	} // Messaging
+} // GS
+
+
+#endif	// __MESSAGING__