tree b202b9f9559bbacfbd8226ec29d37ab6c0749a59
parent eff9ab2fdc85d2039312b44b33b204f5a9b91794
author William A. Kennington III <wak@google.com> 1623708436 -0700
committer William A. Kennington III <wak@google.com> 1623711489 -0700

cancel: Add cancelable utility

This adds a common paradigm for handling a task that may need to be
canceled.

Change-Id: I2d06318f56788045f2688da137698dd7177e1fa2
Signed-off-by: William A. Kennington III <wak@google.com>