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76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*
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* Copyright (C) 2008-2019 TrinityCore <https://www.trinitycore.org/>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _QUERY_CALLBACK_H
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#define _QUERY_CALLBACK_H
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#include "Define.h"
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#include "DatabaseEnvFwd.h"
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#include <functional>
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#include <future>
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#include <list>
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#include <queue>
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#include <utility>
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class TC_DATABASE_API QueryCallback
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{
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public:
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explicit QueryCallback(QueryResultFuture&& result);
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explicit QueryCallback(PreparedQueryResultFuture&& result);
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QueryCallback(QueryCallback&& right);
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QueryCallback& operator=(QueryCallback&& right);
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~QueryCallback();
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QueryCallback&& WithCallback(std::function<void(QueryResult)>&& callback);
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QueryCallback&& WithPreparedCallback(std::function<void(PreparedQueryResult)>&& callback);
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QueryCallback&& WithChainingCallback(std::function<void(QueryCallback&, QueryResult)>&& callback);
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QueryCallback&& WithChainingPreparedCallback(std::function<void(QueryCallback&, PreparedQueryResult)>&& callback);
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// Moves std::future from next to this object
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void SetNextQuery(QueryCallback&& next);
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enum Status
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{
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NotReady,
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NextStep,
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Completed
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};
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Status InvokeIfReady();
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private:
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QueryCallback(QueryCallback const& right) = delete;
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QueryCallback& operator=(QueryCallback const& right) = delete;
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template<typename T> friend void ConstructActiveMember(T* obj);
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template<typename T> friend void DestroyActiveMember(T* obj);
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template<typename T> friend void MoveFrom(T* to, T&& from);
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union
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{
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QueryResultFuture _string;
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PreparedQueryResultFuture _prepared;
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};
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bool _isPrepared;
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struct QueryCallbackData;
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std::queue<QueryCallbackData, std::list<QueryCallbackData>> _callbacks;
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};
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#endif // _QUERY_CALLBACK_H
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