register_subtree
Description:
Registers a whole subtree of dynamic objects.
The enumerate and introspection functions in vtable are used to convey, to remote callers, what nodes
exist in the subtree rooted by object_path.
When handling remote calls into any node in the subtree, first the enumerate function is used to check if the node exists. If the
node exists or the g_dbus_subtree_flags_dispatch_to_unenumerated_nodes flag is set the introspection
function is used to check if the node supports the requested method. If so, the dispatch function is used to determine
where to dispatch the call. The collected DBusInterfaceVTable and
pointer will be used to call into the interface vtable for processing the request.
All calls into user-provided code will be invoked in the thread-default main context of the thread you are calling this method from.
If an existing subtree is already registered at object_path or then throws is set to
g_io_error_exists.
Note that it is valid to register regular objects (using register_object) in a subtree registered with register_subtree - if so, the subtree handler is tried as the last resort. One way to think about a subtree handler is to consider it a fallback handler for object paths not registered via register_object or other bindings.
Note that vtable will be copied so you cannot change it after registration.
See this server for an example of how to use this method.
Parameters:
| this | |
| object_path |
the object path to register the subtree at |
| vtable |
a DBusSubtreeVTable to enumerate, introspect and dispatch nodes in the subtree |
| flags |
flags used to fine tune the behavior of the subtree |
| user_data |
data to pass to functions in |
| user_data_free_func |
function to call when the subtree is unregistered |
Returns:
|
0 if throws is set, otherwise a subtree registration ID (never 0) that can be used with unregister_subtree |