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-rw-r--r-- | src/tools/clippy/src/docs/missing_spin_loop.txt | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/src/tools/clippy/src/docs/missing_spin_loop.txt b/src/tools/clippy/src/docs/missing_spin_loop.txt deleted file mode 100644 index 3a06a91d7..000000000 --- a/src/tools/clippy/src/docs/missing_spin_loop.txt +++ /dev/null @@ -1,27 +0,0 @@ -### What it does -Check for empty spin loops - -### Why is this bad? -The loop body should have something like `thread::park()` or at least -`std::hint::spin_loop()` to avoid needlessly burning cycles and conserve -energy. Perhaps even better use an actual lock, if possible. - -### Known problems -This lint doesn't currently trigger on `while let` or -`loop { match .. { .. } }` loops, which would be considered idiomatic in -combination with e.g. `AtomicBool::compare_exchange_weak`. - -### Example - -``` -use core::sync::atomic::{AtomicBool, Ordering}; -let b = AtomicBool::new(true); -// give a ref to `b` to another thread,wait for it to become false -while b.load(Ordering::Acquire) {}; -``` -Use instead: -``` -while b.load(Ordering::Acquire) { - std::hint::spin_loop() -} -```
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