46 lines
2.4 KiB
Rust
46 lines
2.4 KiB
Rust
#![warn(clippy::invalid_atomic_ordering)]
|
|
|
|
use std::sync::atomic::{AtomicUsize, Ordering};
|
|
|
|
fn main() {
|
|
// `compare_exchange` (not weak) testing
|
|
let x = AtomicUsize::new(0);
|
|
|
|
// Allowed ordering combos
|
|
let _ = x.compare_exchange(0, 0, Ordering::Relaxed, Ordering::Relaxed);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Acquire, Ordering::Acquire);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Acquire, Ordering::Relaxed);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Release, Ordering::Relaxed);
|
|
let _ = x.compare_exchange(0, 0, Ordering::AcqRel, Ordering::Acquire);
|
|
let _ = x.compare_exchange(0, 0, Ordering::AcqRel, Ordering::Relaxed);
|
|
let _ = x.compare_exchange(0, 0, Ordering::SeqCst, Ordering::Relaxed);
|
|
let _ = x.compare_exchange(0, 0, Ordering::SeqCst, Ordering::Acquire);
|
|
let _ = x.compare_exchange(0, 0, Ordering::SeqCst, Ordering::SeqCst);
|
|
|
|
// AcqRel is always forbidden as a failure ordering
|
|
let _ = x.compare_exchange(0, 0, Ordering::Relaxed, Ordering::AcqRel);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Acquire, Ordering::AcqRel);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Release, Ordering::AcqRel);
|
|
let _ = x.compare_exchange(0, 0, Ordering::AcqRel, Ordering::AcqRel);
|
|
let _ = x.compare_exchange(0, 0, Ordering::SeqCst, Ordering::AcqRel);
|
|
|
|
// Release is always forbidden as a failure ordering
|
|
let _ = x.compare_exchange(0, 0, Ordering::Relaxed, Ordering::Release);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Acquire, Ordering::Release);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Release, Ordering::Release);
|
|
let _ = x.compare_exchange(0, 0, Ordering::AcqRel, Ordering::Release);
|
|
let _ = x.compare_exchange(0, 0, Ordering::SeqCst, Ordering::Release);
|
|
|
|
// Release success order forbids failure order of Acquire or SeqCst
|
|
let _ = x.compare_exchange(0, 0, Ordering::Release, Ordering::Acquire);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Release, Ordering::SeqCst);
|
|
|
|
// Relaxed success order also forbids failure order of Acquire or SeqCst
|
|
let _ = x.compare_exchange(0, 0, Ordering::Relaxed, Ordering::SeqCst);
|
|
let _ = x.compare_exchange(0, 0, Ordering::Relaxed, Ordering::Acquire);
|
|
|
|
// Acquire/AcqRel forbids failure order of SeqCst
|
|
let _ = x.compare_exchange(0, 0, Ordering::Acquire, Ordering::SeqCst);
|
|
let _ = x.compare_exchange(0, 0, Ordering::AcqRel, Ordering::SeqCst);
|
|
}
|