GioDBusInterfaceVTable

Virtual table for handling properties and method calls for a D-Bus interface.

Since 2.38, if you want to handle getting/setting D-Bus properties asynchronously, give NULL as your get_property() or set_property() function. The D-Bus call will be directed to your method_call function, with the provided interface_name set to “org.freedesktop.DBus.Properties”.

Ownership of the GDBusMethodInvocation object passed to the method_call() function is transferred to your handler; you must call one of the methods of GDBusMethodInvocation to return a reply (possibly empty), or an error. These functions also take ownership of the passed-in invocation object, so unless the invocation object has otherwise been referenced, it will be then be freed. Calling one of these functions may be done within your method_call() implementation but it also can be done at a later point to handle the method asynchronously.

The usual checks on the validity of the calls is performed. For Get calls, an error is automatically returned if the property does not exist or the permissions do not allow access. The same checks are performed for Set calls, and the provided value is also checked for being the correct type.

For both Get and Set calls, the GDBusMethodInvocation passed to the method_call handler can be queried with g_dbus_method_invocation_get_property_info() to get a pointer to the GDBusPropertyInfo of the property.

If you have readable properties specified in your interface info, you must ensure that you either provide a non-NULL get_property() function or provide implementations of both the Get and GetAll methods on org.freedesktop.DBus.Properties interface in your method_call function. Note that the required return type of the Get call is (v), not the type of the property. GetAll expects a return value of type a{sv}.

If you have writable properties specified in your interface info, you must ensure that you either provide a non-NULL set_property() function or provide an implementation of the Set call. If implementing the call, you must return the value of type G_VARIANT_TYPE_UNIT.

Available since: 2.26