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style: Tweak rule tree memory ordering.

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I've commented on the ones that I think are the most tricky. Note that this code
is stress-tested in the style tests (tests/unit/style/rule_tree/bench.rs).
This commit is contained in:
Emilio Cobos Álvarez 2017-02-15 13:29:29 +01:00
parent 5b037a0aa0
commit 1d94a68e54
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2 changed files with 80 additions and 41 deletions
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7
tests/unit/style/rule_tree/bench.rs
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@ -33,7 +33,12 @@ impl<'a> AutoGCRuleTree<'a> {
impl<'a> Drop for AutoGCRuleTree<'a> {
fn drop(&mut self) {
unsafe { self.0.gc() }
unsafe {
self.0.gc();
assert!(::std::thread::panicking() ||
!self.0.root().has_children_for_testing(),
"No rule nodes other than the root shall remain!");
}
}
}