//////////////////////////////////////////////////////////////////////////// // // Copyright 2017 Realm Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // //////////////////////////////////////////////////////////////////////////// #ifndef REALM_OS_NOTIFICATION_WRAPPER_HPP #define REALM_OS_NOTIFICATION_WRAPPER_HPP #include <realm/object-store/collection_notifications.hpp> namespace realm { namespace _impl { // A wrapper that stores a value and an associated notification token. // The point of this type is to keep the notification token alive // until the value can be properly processed or handled. template <typename T> struct NotificationWrapper : public T { using T::T; NotificationWrapper(T&& object) : T(object) { } template <typename F> void add_notification_callback(F&& callback) { m_token = T::add_notification_callback(std::forward<F>(callback)); } private: NotificationToken m_token; }; } // namespace _impl } // namespace realm #endif // REALM_OS_NOTIFICATION_WRAPPER_HPP