forked from blue/lmdbal
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
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// Squawk messenger.
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// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef DATABASE_CACHE_H
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#define DATABASE_CACHE_H
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#include "database.h"
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#include "table.h"
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#include <map>
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#include <set>
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template <class K, class V>
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class DataBase::Cache : public DataBase::Table<K, V> {
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friend class DataBase;
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enum class Mode {
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nothing,
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size,
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full
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};
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protected:
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Cache(const std::string& name, DataBase* parent);
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~Cache() override;
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public:
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virtual void addRecord(const K& key, const V& value) override;
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virtual void changeRecord(const K& key, const V& value) override;
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virtual void removeRecord(const K& key) override;
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virtual V getRecord(const K& key) const override;
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//virtual uint32_t count() const;
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//virtual void drop();
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protected:
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Mode mode;
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std::map<K, V>* cache;
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std::set<K>* abscent;
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};
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#include "cache.hpp"
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#endif // DATABASE_CACHE_H
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