util: add lifetime
(Probably) closes #3417 (closed), supersedes !3513 (closed)
This MR introduces a small wlr_lifetime_dep struct, which simplifies destroying dependent objects on dependency destruction while avoiding use-after-free.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
(Probably) closes #3417 (closed), supersedes !3513 (closed)
This MR introduces a small wlr_lifetime_dep struct, which simplifies destroying dependent objects on dependency destruction while avoiding use-after-free.