tree 0cca59785aa6983f8fd666643f0b729f8e4c1fde
parent 458aeae0c60c5c3afbfd5c87bd8637372b26e93d
author William A. Kennington III <wak@google.com> 1623708799 -0700
committer William A. Kennington III <wak@google.com> 1623712766 -0700

cancel: Add utility for always running callback

This makes it possible to have a guaranteed callback, where an uncalled
callback will be called with a set of default parameters upon
destruction if it was not called at least once.

Change-Id: Id5b499e645adc9e23bf03158f10710f281bd7fd3
Signed-off-by: William A. Kennington III <wak@google.com>