mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-22 02:53:20 +00:00
47 lines
2.6 KiB
Rust
47 lines
2.6 KiB
Rust
#![warn(clippy::invalid_atomic_ordering)]
|
|
|
|
use std::sync::atomic::{AtomicPtr, Ordering};
|
|
|
|
fn main() {
|
|
let ptr = &mut 5;
|
|
let ptr2 = &mut 10;
|
|
// `compare_exchange_weak` testing
|
|
let x = AtomicPtr::new(ptr);
|
|
|
|
// Allowed ordering combos
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Relaxed);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Acquire);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Relaxed);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Relaxed);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Acquire);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Relaxed);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Relaxed);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Acquire);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::SeqCst);
|
|
|
|
// AcqRel is always forbidden as a failure ordering
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Relaxed, Ordering::AcqRel);
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::AcqRel);
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::AcqRel);
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::AcqRel);
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::SeqCst, Ordering::AcqRel);
|
|
|
|
// Release is always forbidden as a failure ordering
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Release);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Release);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Release);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Release);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Release);
|
|
|
|
// Release success order forbids failure order of Acquire or SeqCst
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::Acquire);
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::SeqCst);
|
|
|
|
// Relaxed success order also forbids failure order of Acquire or SeqCst
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::SeqCst);
|
|
let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Acquire);
|
|
|
|
// Acquire/AcqRel forbids failure order of SeqCst
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::SeqCst);
|
|
let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::SeqCst);
|
|
}
|