### Struct

# Gio DBusInterfaceVTable

since: 2.26

#### Description [src]

    struct GDBusInterfaceVTable {
      GDBusInterfaceMethodCallFunc method_call;
      GDBusInterfaceGetPropertyFunc get_property;
      GDBusInterfaceSetPropertyFunc set_property;
    }

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`.

###### Structure members

`method_call`

  Function for handling incoming method calls.

`get_property`

  Function for getting a property.

`set_property`

  Function for setting a property.

Available since: 2.26