If you're in hard realtime land then you can't have any allocations at all; that's a pretty different ballgame.
Destructors should be as simple and side-effect free as possible, with the exception of things like locks or file handles where the expectation is very clear that the object going out of scope will trigger a release action.
Destructors should be as simple and side-effect free as possible, with the exception of things like locks or file handles where the expectation is very clear that the object going out of scope will trigger a release action.