the object path to register the subtree at
a GDBusSubtreeVTable to enumerate, introspect and dispatch nodes in the subtree
flags used to fine tune the behavior of the subtree
data to pass to functions in vtable
function to call when the subtree is unregistered
0 if error is set, otherwise a subtree registration id (never 0) that can be used with g_dbus_connection_unregister_subtree() .
GException on failure.
2.26
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 GDBusInterfaceVTable and gpointer 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][g-main-context-push-thread-default] of the thread you are calling this method from.
If an existing subtree is already registered at object_path or then error is set to G_IO_ERROR_EXISTS
Note that it is valid to register regular objects (using g_dbus_connection_register_object()) in a subtree registered with g_dbus_connection_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 g_dbus_connection_register_object() or other bindings.
Note that vtable will be copied so you cannot change it after registration.
See this server[gdbus-subtree-server] for an example of how to use this method.