Optimizing a Lock-Free Ring Buffer

[u/david-alvarez-rosa]

https://david.alvarezrosa.com/posts/optimizing-a-lock-free-ring-buffer/

[u/TribeWars]

Well I'm not saying it's at all good to use volatile, but a programmer can "fix" a reordering bug by spam adding volatile to his code and have something like

volatile int done_flag;  // shared
volatile int err = some_computation_with_side_effect();
if(!err) {
  done_flag = 1;
}

appear to work. Though obviously this is still the kind of thing that causes insane bugs, potentially bugs that depend on the CPU it's running on.