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check revision for overflow

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This commit is contained in:
Aleksey Kladov 2018-10-10 00:48:19 +03:00
parent 74486afdec
commit e42c68913e
1 changed files with 3 additions and 1 deletions
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4
src/runtime.rs
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@ -79,8 +79,10 @@ where
panic!("increment_revision invoked during a query computation");
}
let old_revision = self.shared_state.revision.fetch_add(1, Ordering::SeqCst);
assert!(old_revision != usize::max_value());
let result = Revision {
generation: 1 + self.shared_state.revision.fetch_add(1, Ordering::SeqCst) as u64,
generation: 1 + old_revision as u64,
};
debug!("increment_revision: incremented to {:?}", result);