Promise.with_change_func

Description:

[ CCode ( has_construct_function = false ) ]
public Promise.with_change_func (owned PromiseChangeFunc func)

func will be called exactly once when transitioning out of PENDING into any of the other PromiseResult states.

Parameters:

func

a PromiseChangeFunc to call
notify

notification function that user_data is no longer needed
user_data

argument to call func with

Returns:

a new Promise