Method GetValue

library/cpp/cache/thread_safe_cache.h:139–163

    private:
        template <bool AllowNullValues>
        const TPtr GetValue(TArgs... args) const {
            Key key = Callbacks.GetKey(args...);
            switch (GettersPromotionPolicy) {
                case EGettersPromotionPolicy::Promoted:
                    break;
                case EGettersPromotionPolicy::Unpromoted: {
                    TReadGuard r(Mutex);
                    typename TInternalCache::TIterator i = Cache.FindWithoutPromote(key);
                    if (i != Cache.End()) {
                        return i.Value();
                    }
                    break;
                }
            }
            TWriteGuard w(Mutex);
            typename TInternalCache::TIterator i = Cache.Find(key);
            if (i != Cache.End()) {
                return i.Value();
            }
            TPtr value = Callbacks.CreateObject(args...);
            if (value || AllowNullValues) {
                Cache.Insert(key, value);
            }
            return value;
        }

    private:
        using TInternalCache = TCache<Key, TPtr, List<Key, TPtr>, TNoopDelete>;