Code RoomAsync call blocks all threads

HardPrep Room Coding #2210

Async call blocks all threads

Code reviewConcurrencySenior–Staff~31 min

Review this C# cache that serializes refreshes with a lock.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 31 min

Mark a line and say what kind of problem it is.0 findings

1private readonly object _gate = new object();

2private Data _data;

3

4public async Task<Data> GetAsync() {

5 lock (_gate) {

6 if (_data != null) return _data;

7 _data = await FetchFromNetworkAsync(); // refresh

8 return _data;

9 }

10}

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.