projects / rustc.git / blame
| Commit | Line | Data |
|---|---|---|
| f20569fa XL |
1 | #![warn(clippy::invalid_atomic_ordering)] |
| 2 | ||
| 3 | use std::sync::atomic::{AtomicPtr, Ordering}; | |
| 4 | ||
| 5 | fn main() { | |
| 6 | let ptr = &mut 5; | |
| 7 | let ptr2 = &mut 10; | |
| 8 | // `compare_exchange_weak` testing | |
| 9 | let x = AtomicPtr::new(ptr); | |
| 10 | ||
| 11 | // Allowed ordering combos | |
| 12 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Relaxed); | |
| 13 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Acquire); | |
| 14 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Relaxed); | |
| 15 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Relaxed); | |
| 16 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Acquire); | |
| 17 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Relaxed); | |
| 18 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Relaxed); | |
| 19 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Acquire); | |
| 20 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::SeqCst); | |
| 21 | ||
| 22 | // AcqRel is always forbidden as a failure ordering | |
| 23 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Relaxed, Ordering::AcqRel); | |
| 24 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::AcqRel); | |
| 25 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::AcqRel); | |
| 26 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::AcqRel); | |
| 27 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::SeqCst, Ordering::AcqRel); | |
| 28 | ||
| 29 | // Release is always forbidden as a failure ordering | |
| 30 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Release); | |
| 31 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Release); | |
| 32 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Release); | |
| 33 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Release); | |
| 34 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Release); | |
| 35 | ||
| 36 | // Release success order forbids failure order of Acquire or SeqCst | |
| 37 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::Acquire); | |
| 38 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::SeqCst); | |
| 39 | ||
| 40 | // Relaxed success order also forbids failure order of Acquire or SeqCst | |
| 41 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::SeqCst); | |
| 42 | let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Acquire); | |
| 43 | ||
| 44 | // Acquire/AcqRel forbids failure order of SeqCst | |
| 45 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::SeqCst); | |
| 46 | let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::SeqCst); | |
| 47 | } |