public async Task Can_exchange_value()
{
var safeLazy = new ThreadSafeLazyRef <string>(() => "");
var tasks = new List <Task>();
for (var i = 0; i < 10; i++)
{
tasks.Add(Task.Run(() => safeLazy.ExchangeValue(s => s + "s")));
}
await Task.WhenAll(tasks);
Assert.Equal("ssssssssss", safeLazy.Value);
}
public virtual TValue GetOrAdd([NotNull] TKey key, [NotNull] Func <TKey, TValue> factory)
{
Check.NotNull(key, "key");
Check.NotNull(factory, "factory");
TValue value;
if (!_cache.Value.TryGetValue(key, out value))
{
var newValue = factory(key);
_cache.ExchangeValue(d => d.ContainsKey(key) ? d : d.Add(key, newValue));
value = _cache.Value[key];
}
return(value);
}
