Is ABA an issue here? "Replace A by X*A" should be perfectly fine if an atomic swap gives you A back, since it means it was actually A at the time when you perf

Is ABA an issue here? "Replace A by X*A" should be perfectly fine if an atomic swap gives you A back, since it means it was actually A at the time when you perform the swap. That it was B a moment go doesn't seem to matter.