renamed template parameters
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3658664eb9
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@ -25,10 +25,10 @@ struct cache_entry_base {
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[[nodiscard]] virtual bool is_dead() const noexcept = 0;
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};
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template<typename T>
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template<typename Type>
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struct cache_entry : cache_entry_base {
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std::weak_ptr<object_proxy<T> > proxy;
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std::weak_ptr<T> entity;
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std::weak_ptr<object_proxy<Type> > proxy;
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std::weak_ptr<Type> entity;
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[[nodiscard]] bool is_dead() const noexcept override {
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return proxy.expired() && entity.expired();
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@ -63,8 +63,8 @@ public:
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* Andernfalls wird ein neuer Proxy erzeugt, im Cache abgelegt und zurückgegeben.
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* Falls für (T, id) bereits eine Entity vorhanden ist, wird sie an den Proxy gebunden.
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*
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* @tparam T Entity-Typ.
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* @tparam ResolverPtr Zeiger-Typ auf einen Resolver, typischerweise
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* @tparam Type Entity-Typ.
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* @tparam ResolverPointerType Zeiger-Typ auf einen Resolver, typischerweise
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* @c std::shared_ptr<object_resolver<T>> oder @c std::weak_ptr<object_resolver<T>>.
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* @param id Identifier/Primärschlüssel der Entity.
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* @param resolver_ptr Resolver (shared/weak), der zur Lazy-Auflösung durch den Proxy genutzt wird.
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@ -72,23 +72,23 @@ public:
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*
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* @note Diese Methode ist threadsafe.
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*/
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template<typename T, typename ResolverPtr>
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std::shared_ptr<object_proxy<T>> acquire_proxy(utils::identifier id, ResolverPtr &&resolver_ptr) {
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const auto k = make_key<T>(id);
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template<typename Type, typename ResolverPointerType>
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std::shared_ptr<object_proxy<Type>> acquire_proxy(utils::identifier id, ResolverPointerType &&resolver_ptr) {
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const auto k = make_key<Type>(id);
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std::unique_lock lock(mutex_);
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auto it = map_.find(k);
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if (it != map_.end()) {
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// found entry, return std::shared_ptr of proxy
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auto *entry = entry_cast_<T>(it->second.get());
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auto *entry = entry_cast_<Type>(it->second.get());
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if (auto proxy_ptr = entry->proxy.lock()) {
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return proxy_ptr;
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}
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// if the proxy is dead, but the entity is alive, create a new proxy and attach entity
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auto weak_resolver = to_weak<T>(std::forward<ResolverPtr>(resolver_ptr));
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auto proxy_ptr = std::make_shared<object_proxy<T>>(weak_resolver, id);
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auto weak_resolver = to_weak<Type>(std::forward<ResolverPointerType>(resolver_ptr));
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auto proxy_ptr = std::make_shared<object_proxy<Type>>(weak_resolver, id);
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if (auto obj = entry->entity.lock()) {
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proxy_ptr->attach(std::move(obj));
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@ -101,12 +101,12 @@ public:
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}
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// entry couldn't be found, create a new entry
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auto entry_ptr = std::make_unique<cache_entry<T>>();
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auto entry_ptr = std::make_unique<cache_entry<Type>>();
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auto *entry = entry_ptr.get();
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// create a weak resolver and shared proxy
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auto weak_resolver = to_weak<T>(std::forward<ResolverPtr>(resolver_ptr));
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auto proxy_ptr = std::make_shared<object_proxy<T>>(weak_resolver, id);
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auto weak_resolver = to_weak<Type>(std::forward<ResolverPointerType>(resolver_ptr));
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auto proxy_ptr = std::make_shared<object_proxy<Type>>(weak_resolver, id);
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// lock entity and attach to proxy
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if (auto obj = entry->entity.lock()) {
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@ -286,12 +286,10 @@ private:
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}
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template<typename T, typename U>
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using enable_if_resolver_shared_ptr_t =
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std::enable_if_t<std::is_base_of_v<object_resolver<T>, U>, int>;
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using enable_if_resolver_shared_ptr_t = std::enable_if_t<std::is_base_of_v<object_resolver<T>, U>, int>;
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template<typename T, typename U>
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using enable_if_resolver_weak_ptr_t =
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std::enable_if_t<std::is_base_of_v<object_resolver<T>, U>, int>;
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using enable_if_resolver_weak_ptr_t = std::enable_if_t<std::is_base_of_v<object_resolver<T>, U>, int>;
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// shared_ptr<Derived> -> weak_ptr<Base>
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template<typename T, typename U, enable_if_resolver_shared_ptr_t<T, U> = 0>
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@ -306,8 +304,8 @@ private:
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}
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// (2) Opportunistischer Cleanup: entferne Entry, wenn beide weak_ptr abgelaufen sind.
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template<typename It>
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bool prune_if_dead(It &it) {
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template<typename IteratorType>
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bool prune_if_dead(IteratorType &it) {
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if (it == map_.end()) {
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return false;
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}
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@ -319,9 +317,9 @@ private:
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return false;
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}
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template<typename T>
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template<typename Type>
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void prune_if_dead_typed(typename std::unordered_map<key, std::unique_ptr<cache_entry_base>, key_hash>::iterator &it) {
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(void)T{}; // T bleibt im Interface, damit bestehende Call-Sites unverändert bleiben können.
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(void)Type{}; // T bleibt im Interface, damit bestehende Call-Sites unverändert bleiben können.
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prune_if_dead(it);
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}
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