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async_lru_cache: fix handling of errors in fetch 

The future needs to be removed from the pending map in any case, even if
it returned an error, else all upcoming calls to access this key will
always return the same error.

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Stefan Reiter 2021-06-17 11:02:32 +02:00 committed by Wolfgang Bumiller
parent 3d3769830b
commit c48c38ab8c
1 changed files with 7 additions and 6 deletions
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13
src/tools/async_lru_cache.rs
View File

@ -65,15 +65,16 @@ impl<K: std::cmp::Eq + std::hash::Hash + Copy, V: Clone + Send + 'static> AsyncL
};
let result = result_fut.await;
match result {
Ok(Some(ref value)) if owner => {
// this call was the one initiating the request, put into LRU and remove from map
let mut maps = self.maps.lock().unwrap();
if owner {
// this call was the one initiating the request, put into LRU and remove from map
let mut maps = self.maps.lock().unwrap();
if let Ok(Some(ref value)) = result {
maps.0.insert(key, value.clone());
maps.1.remove(&key);
}
_ => {}
maps.1.remove(&key);
}
result
}
}