When using a private connection, we need to use dbus_g_proxy_new_for_peer()
because the bus isn't involved. Since many parts of libnm-glib create a
proxy for their corresponding remote object, consolidate the proxy creation
logic.
A later patch will add logic to use a private connection versus a bus-based
one.
We need to do _nm_object_ensure_inited() /
_nm_remote_settings_ensure_inited() from the get_property()
implementations; in most cases, get_property() just calls another
accessor method (which will call _nm_object_ensure_inited()), but in a
few places, it reads priv->whatever directly, so we need to make sure
that it's valid.
Implement GInitable and GAsyncInitable in NMObject, with
implementations that synchronously or asynchonously load all
properties, and change _nm_object_ensure_inited() to run
g_initable_init().
Update the object/object-array property handling to initialize the
objects after creating them (synchronously or asynchronously,
according to the situation), so that they will have all of their
properties preloaded before they are ever visible to the caller.
Move the non-blocking/non-failable parts of various objects'
constructor() methods to constructed(), and move the blocking/failable
parts to init(), and implement init_async() methods with non-blocking
versions of the blocking methods.
Make nm_device_new() and nm_client_new() call
_nm_object_ensure_inited(), to preserve the behaviour formerly
enforced by their construct() methods, that properties are guaranteed
to be initialized before any signals involving them are emitted.
Rather than having every property getter method have code to fetch
that specific property's value, just call the new
_nm_object_ensure_inited() (which makes sure that we've read all the
property values on the object at least once), and then return the
cached value. (After we've read the initial property values, the
PropertiesChanged signal handler will ensure that the values are kept
up to date, so we can always just return cached property values after
that point.)
This then lets us get rid of _nm_object_get_property() and its
wrappers.
Rename _nm_object_handle_properties_changed(), etc, to be about
properties in general, rather than just property changes.
Interpret func==NULL in NMPropertiesInfo as meaning "use
_nm_object_demarshal_generic", and then reorder the fields so that you
can just leave that field out in the declarations when it's NULL.
Add a way to register properties that exist in D-Bus but aren't
tracked by the NMObjects, and use that for NMDevice's D-Bus Ip4Address
property, replacing the existing hack.
Also add a few other missing properties noticed along the way.
Add the necessary annotations (the mininum required, that is those
on return values. NULL parameters or container types may require
more), and the Autotools stuff to get a NetworkManager GIR for
libnm-util and a NMClient for libnm-glib.
