X-Git-Url: https://git.mdrn.pl/wl-app.git/blobdiff_plain/53b27422d140022594fc241cca91c3183be57bca..48b2fe9f7c2dc3d9aeaaa6dbfb27c7da4f3235ff:/iOS/Pods/Realm/include/thread_safe_reference.hpp

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+////////////////////////////////////////////////////////////////////////////
+//
+// 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_THREAD_SAFE_REFERENCE_HPP
+#define REALM_THREAD_SAFE_REFERENCE_HPP
+
+
+#include <realm/group_shared.hpp>
+
+namespace realm {
+class LinkView;
+class List;
+class Object;
+class Query;
+class Realm;
+class Results;
+class TableView;
+template<typename T> class BasicRow;
+typedef BasicRow<Table> Row;
+
+// Opaque type representing an object for handover
+class ThreadSafeReferenceBase {
+public:
+    ThreadSafeReferenceBase(const ThreadSafeReferenceBase&) = delete;
+    ThreadSafeReferenceBase& operator=(const ThreadSafeReferenceBase&) = delete;
+    ThreadSafeReferenceBase(ThreadSafeReferenceBase&&) = default;
+    ThreadSafeReferenceBase& operator=(ThreadSafeReferenceBase&&) = default;
+    ThreadSafeReferenceBase();
+    virtual ~ThreadSafeReferenceBase();
+
+    bool is_invalidated() const { return m_source_realm == nullptr; };
+
+protected:
+    // Precondition: The associated Realm is for the current thread and is not in a write transaction;.
+    ThreadSafeReferenceBase(std::shared_ptr<Realm> source_realm);
+
+    SharedGroup& get_source_shared_group() const;
+
+    template <typename V, typename T>
+    V invalidate_after_import(Realm& destination_realm, T construct_with_shared_group);
+
+private:
+    friend Realm;
+
+    VersionID m_version_id;
+    std::shared_ptr<Realm> m_source_realm; // Strong reference keeps alive so version stays pinned! Don't touch!!
+
+    bool has_same_config(Realm& realm) const;
+    void invalidate();
+};
+
+template <typename T>
+class ThreadSafeReference;
+
+template<>
+class ThreadSafeReference<List>: public ThreadSafeReferenceBase {
+    friend class Realm;
+
+    std::unique_ptr<SharedGroup::Handover<LinkView>> m_link_view;
+    std::unique_ptr<SharedGroup::Handover<Table>> m_table;
+
+    // Precondition: The associated Realm is for the current thread and is not in a write transaction;.
+    ThreadSafeReference(List const& value);
+
+    // Precondition: Realm and handover are on same version.
+    List import_into_realm(std::shared_ptr<Realm> realm) &&;
+};
+
+template<>
+class ThreadSafeReference<Object>: public ThreadSafeReferenceBase {
+    friend class Realm;
+
+    std::unique_ptr<SharedGroup::Handover<Row>> m_row;
+    std::string m_object_schema_name;
+
+    // Precondition: The associated Realm is for the current thread and is not in a write transaction;.
+    ThreadSafeReference(Object const& value);
+
+    // Precondition: Realm and handover are on same version.
+    Object import_into_realm(std::shared_ptr<Realm> realm) &&;
+};
+
+template<>
+class ThreadSafeReference<Results>: public ThreadSafeReferenceBase {
+    friend class Realm;
+
+    std::unique_ptr<SharedGroup::Handover<Query>> m_query;
+    DescriptorOrdering::HandoverPatch m_ordering_patch;
+
+    // Precondition: The associated Realm is for the current thread and is not in a write transaction;.
+    ThreadSafeReference(Results const& value);
+
+    // Precondition: Realm and handover are on same version.
+    Results import_into_realm(std::shared_ptr<Realm> realm) &&;
+};
+}
+
+#endif /* REALM_THREAD_SAFE_REFERENCE_HPP */