//////////////////////////////////////////////////////////////////////////// // // Copyright 2016 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_THREAD_SAFE_REFERENCE_HPP #define REALM_OS_THREAD_SAFE_REFERENCE_HPP #include <memory> namespace realm { class List; class Object; class Realm; class Results; namespace object_store { class Dictionary; } // Opaque type-ereased wrapper for a Realm object which can be imported into another Realm class ThreadSafeReference { public: ThreadSafeReference() noexcept; ~ThreadSafeReference(); ThreadSafeReference(const ThreadSafeReference&) = delete; ThreadSafeReference& operator=(const ThreadSafeReference&) = delete; ThreadSafeReference(ThreadSafeReference&&) noexcept; ThreadSafeReference& operator=(ThreadSafeReference&&) noexcept; template <typename T> ThreadSafeReference(T const& value); // Import the object into the destination Realm template <typename T> T resolve(std::shared_ptr<Realm> const&); // Is the payload of a certain type template <typename T> bool is() const; explicit operator bool() const noexcept { return !!m_payload; } private: class Payload; template <typename> class CollectionPayload; template <typename> class PayloadImpl; std::unique_ptr<Payload> m_payload; }; template <> ThreadSafeReference::ThreadSafeReference(std::shared_ptr<Realm> const&); template <> std::shared_ptr<Realm> ThreadSafeReference::resolve(std::shared_ptr<Realm> const&); } // namespace realm #endif /* REALM_OS_THREAD_SAFE_REFERENCE_HPP */