[sr-dev] Implementation question / usrloc / registrar

Hi everyone, just a short request for comments: Similar to the dialog-variables, which i implemented in my IMS branch recently, i need something similar for usrloc. Basically, i need to store additional data to a registration; which i can access after "lookup()" or upon a "is_registered()" call. Basically: $reg_var(test) = "some value"; save(); - - - lookup(); xlog("reg_var(test) is $reg_var(test)\n"); Now there are different approaches: 1) implement this funtionality in usrloc/registrar directly (similar to my dialog-pvar-implementation). The performance when doing this impact should be minor if not used, since simply an empty pointer would be carried along every registration. This would be the cleanest way to do this; but however since many people are using usrloc i have a little respect doing changes on such core-module. Maybe it could be implemented as a change in usrloc and a dedicated module just for getting and setting the values. 2) another way would be to implement this in a dedicated module. This would mean, that i would not touch usrloc module and it would of course have no impact on "regular" usrloc usage at all if not used. I would have to add a second list of in-memory values, which would have to be synched with db, a second timer to do so. The list would be dependent on the usrloc callbacks. There is always the danger data-inconsistency. 3) is there any way, to do this with some event-routes, shared-variables or something similar? Any thoughts? Comments very welcome! Kind regards, Carsten P.S.: If i do not receive any comments, i would implement the first approach (directly in usrloc/registrar) in my IMS-branch for later merging into master.