tests/ui/lint/lint-invalid-atomic-ordering-exchange-weak.rs

   1 // only-x86_64
   2 use std::sync::atomic::{AtomicPtr, Ordering};
   3
   4 fn main() {
   5     let ptr = &mut 5;
   6     let ptr2 = &mut 10;
   7     // `compare_exchange_weak` testing
   8     let x = AtomicPtr::new(ptr);
   9
  10     // Allowed ordering combos
  11     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Relaxed);
  12     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Acquire);
  13     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::SeqCst);
  14     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Relaxed);
  15     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Acquire);
  16     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::SeqCst);
  17     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Relaxed);
  18     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::Acquire);
  19     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::SeqCst);
  20     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Relaxed);
  21     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Acquire);
  22     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::SeqCst);
  23     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Relaxed);
  24     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Acquire);
  25     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::SeqCst);
  26
  27     // AcqRel is always forbidden as a failure ordering
  28     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Relaxed, Ordering::AcqRel);
  29     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  30     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::AcqRel);
  31     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  32     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::AcqRel);
  33     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  34     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::AcqRel);
  35     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  36     let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::SeqCst, Ordering::AcqRel);
  37     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  38
  39     // Release is always forbidden as a failure ordering
  40     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Release);
  41     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  42     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Release);
  43     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  44     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Release);
  45     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  46     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Release);
  47     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  48     let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Release);
  49     //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
  50 }