Re: [Bluez-devel] [PATCH] dbus.c: cleanup/fix method parameter getting

[Johan Hedberg <johan.hedberg@nokia.com>]

Hi Marcel,

On Tue, Nov 08, 2005, Marcel Holtmann wrote:
> > Ok, I see your point. I didn't quite understand the use-case you were
> > thinking of earlier. One extra requirement that the dbus-id settings has
> > is that we will have to monitor the lifetime of a D-BUS client (by
> > listening NameOwnerChanged D-BUS signals) and remove the corresponding
> > entry from the settings table when an id gets removed from the bus.
> 
> this might be too much work for the current interface. Or do you think
> it can be easily implemented?

It will require a moderate amount of coding, so it wont be easy at least
in that respect. However, I think that implementing D-BUS client
lifetime monitoring is a feature that we will inevitably have to
implement at some point anyway. It may e.g. be needed for noticing if a
program which requested an RFCOMM connection suddenly died (in which
case hcid/bluetoothd should disconnect that connection). Also, I've
already done it once (for dbus 0.23.4 though) for the D-BUS API we have
in maemo, so there shouldn't come any "supprises" when implementing it.

> > Ok, I'll begin by doing a patch for Inquiry and PeriodicInquiry
> > (probably during tomorrow).
> 
> This would be great. For the next release I like to have the inquiry (or
> better name it device discovery) working. This will include some nice
> support for the extended inquiry. So you will get the remote name for
> free with a discovery. So is it possible to have different signatures
> for signals too?

Sure, and if the new signature differs only by having extra parameters
at the end it should even be backwards compatible (i.e.
dbus_message_get_args call for the old signature works also for the new
signature).

Johan


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