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Merge #5357

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5357: Use relaxed ordering for marks r=matklad a=matklad

We dont' need this for perf. `Relaxed` ordering is enough here, as we
only have one location. I prefer to use minimal ordering, because that
makes it easier to reason about the code.



bors r+
🤖

Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>
This commit is contained in:
bors[bot] 2020-07-14 07:05:43 +00:00 committed by GitHub
commit a34f79b174
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1 changed files with 2 additions and 2 deletions
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4
crates/test_utils/src/mark.rs
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@ -62,7 +62,7 @@ pub struct MarkChecker {
impl MarkChecker {
pub fn new(mark: &'static AtomicUsize) -> MarkChecker {
let value_on_entry = mark.load(Ordering::SeqCst);
let value_on_entry = mark.load(Ordering::Relaxed);
MarkChecker { mark, value_on_entry }
}
}
@ -72,7 +72,7 @@ impl Drop for MarkChecker {
if std::thread::panicking() {
return;
}
let value_on_exit = self.mark.load(Ordering::SeqCst);
let value_on_exit = self.mark.load(Ordering::Relaxed);
assert!(value_on_exit > self.value_on_entry, "mark was not hit")
}
}