It will also ignore those pesky signals and restart the sleep :) On a more serious note, any reasonable sleep API should either report all wake ups, no matter

It will also ignore those pesky signals and restart the sleep :) On a more serious note, any reasonable sleep API should either report all wake ups, no matter the reason, or none except for the timeout expiration itself. Any additional "reasonable" filtering is a loaded footgun because different API users have different ideas of what is "reasonable" for them.