net.server_{select,event}: Add 'ondetach' callback for listener objects, to notify them when another listener is being assigned to a connection

author: Matthew Wild <mwild1@gmail.com>
date: Fri, 29 Aug 2014 11:39:56 +0100
parent: 6314:8029b8a5f37a
child: 6381:9ffd582c65d8
--- a/net/server_select.lua	Tue Sep 02 17:24:25 2014 +0200
+++ b/net/server_select.lua	Fri Aug 29 11:39:56 2014 +0100
@@ -284,6 +284,7 @@
 	local status = listeners.onstatus
 	local disconnect = listeners.ondisconnect
 	local drain = listeners.ondrain
+	local detach = listener.ondetach
 
 	local bufferqueue = { } -- buffer array
 	local bufferqueuelen = 0	-- end of buffer array
@@ -313,10 +314,14 @@
 		return disconnect
 	end
 	handler.setlistener = function( self, listeners )
+		if detach then
+			detach(self) -- Notify listener that it is no longer responsible for this connection
+		end
 		dispatch = listeners.onincoming
 		disconnect = listeners.ondisconnect
 		status = listeners.onstatus
 		drain = listeners.ondrain
+		detach = listeners.ondetach
 	end
 	handler.getstats = function( )
 		return readtraffic, sendtraffic