tests/ui/lint/lint-invalid-atomic-ordering-fetch-update.rs

   1 // only-x86_64
   2 use std::sync::atomic::{AtomicIsize, Ordering};
   3
   4 fn main() {
   5     // `fetch_update` testing
   6     let x = AtomicIsize::new(0);
   7
   8     // Allowed ordering combos
   9     let _ = x.fetch_update(Ordering::Relaxed, Ordering::Relaxed, |old| Some(old + 1));
  10     let _ = x.fetch_update(Ordering::Relaxed, Ordering::Acquire, |old| Some(old + 1));
  11     let _ = x.fetch_update(Ordering::Relaxed, Ordering::SeqCst, |old| Some(old + 1));
  12     let _ = x.fetch_update(Ordering::Acquire, Ordering::Relaxed, |old| Some(old + 1));
  13     let _ = x.fetch_update(Ordering::Acquire, Ordering::Acquire, |old| Some(old + 1));
  14     let _ = x.fetch_update(Ordering::Acquire, Ordering::SeqCst, |old| Some(old + 1));
  15     let _ = x.fetch_update(Ordering::Release, Ordering::Relaxed, |old| Some(old + 1));
  16     let _ = x.fetch_update(Ordering::Release, Ordering::Acquire, |old| Some(old + 1));
  17     let _ = x.fetch_update(Ordering::Release, Ordering::SeqCst, |old| Some(old + 1));
  18     let _ = x.fetch_update(Ordering::AcqRel, Ordering::Relaxed, |old| Some(old + 1));
  19     let _ = x.fetch_update(Ordering::AcqRel, Ordering::Acquire, |old| Some(old + 1));
  20     let _ = x.fetch_update(Ordering::AcqRel, Ordering::SeqCst, |old| Some(old + 1));
  21     let _ = x.fetch_update(Ordering::SeqCst, Ordering::Relaxed, |old| Some(old + 1));
  22     let _ = x.fetch_update(Ordering::SeqCst, Ordering::Acquire, |old| Some(old + 1));
  23     let _ = x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |old| Some(old + 1));
  24
  25     // AcqRel is always forbidden as a failure ordering
  26     let _ = x.fetch_update(Ordering::Relaxed, Ordering::AcqRel, |old| Some(old + 1));
  27     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  28     let _ = x.fetch_update(Ordering::Acquire, Ordering::AcqRel, |old| Some(old + 1));
  29     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  30     let _ = x.fetch_update(Ordering::Release, Ordering::AcqRel, |old| Some(old + 1));
  31     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  32     let _ = x.fetch_update(Ordering::AcqRel, Ordering::AcqRel, |old| Some(old + 1));
  33     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  34     let _ = x.fetch_update(Ordering::SeqCst, Ordering::AcqRel, |old| Some(old + 1));
  35     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  36
  37     // Release is always forbidden as a failure ordering
  38     let _ = x.fetch_update(Ordering::Relaxed, Ordering::Release, |old| Some(old + 1));
  39     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  40     let _ = x.fetch_update(Ordering::Acquire, Ordering::Release, |old| Some(old + 1));
  41     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  42     let _ = x.fetch_update(Ordering::Release, Ordering::Release, |old| Some(old + 1));
  43     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  44     let _ = x.fetch_update(Ordering::AcqRel, Ordering::Release, |old| Some(old + 1));
  45     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  46     let _ = x.fetch_update(Ordering::SeqCst, Ordering::Release, |old| Some(old + 1));
  47     //~^ ERROR `fetch_update`'s failure ordering may not be `Release` or `AcqRel`
  48
  49 }