46 lines
2.6 KiB
Rust
46 lines
2.6 KiB
Rust
#![warn(clippy::invalid_atomic_ordering)]
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use std::sync::atomic::{AtomicIsize, Ordering};
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fn main() {
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// `fetch_update` testing
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let x = AtomicIsize::new(0);
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// Allowed ordering combos
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let _ = x.fetch_update(Ordering::Relaxed, Ordering::Relaxed, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Acquire, Ordering::Acquire, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Acquire, Ordering::Relaxed, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Release, Ordering::Relaxed, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::AcqRel, Ordering::Acquire, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::AcqRel, Ordering::Relaxed, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::SeqCst, Ordering::Relaxed, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::SeqCst, Ordering::Acquire, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |old| Some(old + 1));
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// AcqRel is always forbidden as a failure ordering
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let _ = x.fetch_update(Ordering::Relaxed, Ordering::AcqRel, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Acquire, Ordering::AcqRel, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Release, Ordering::AcqRel, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::AcqRel, Ordering::AcqRel, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::SeqCst, Ordering::AcqRel, |old| Some(old + 1));
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// Release is always forbidden as a failure ordering
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let _ = x.fetch_update(Ordering::Relaxed, Ordering::Release, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Acquire, Ordering::Release, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Release, Ordering::Release, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::AcqRel, Ordering::Release, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::SeqCst, Ordering::Release, |old| Some(old + 1));
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// Release success order forbids failure order of Acquire or SeqCst
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let _ = x.fetch_update(Ordering::Release, Ordering::Acquire, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Release, Ordering::SeqCst, |old| Some(old + 1));
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// Relaxed success order also forbids failure order of Acquire or SeqCst
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let _ = x.fetch_update(Ordering::Relaxed, Ordering::SeqCst, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::Relaxed, Ordering::Acquire, |old| Some(old + 1));
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// Acquire/AcqRel forbids failure order of SeqCst
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let _ = x.fetch_update(Ordering::Acquire, Ordering::SeqCst, |old| Some(old + 1));
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let _ = x.fetch_update(Ordering::AcqRel, Ordering::SeqCst, |old| Some(old + 1));
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}
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