mirror of https://gitee.com/bigwinds/arangodb
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2017 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_UTILS_DATABASE_GUARD_H
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#define ARANGOD_UTILS_DATABASE_GUARD_H 1
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#include "Basics/Common.h"
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#include "VocBase/vocbase.h"
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namespace arangodb {
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/// @brief Scope guard for a database, ensures that it is not
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/// dropped while still using it.
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class DatabaseGuard {
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public:
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DatabaseGuard(DatabaseGuard&&) = delete;
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DatabaseGuard(DatabaseGuard const&) = delete;
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DatabaseGuard& operator=(DatabaseGuard const&) = delete;
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/// @brief create guard on existing db
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explicit DatabaseGuard(TRI_vocbase_t& vocbase);
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/// @brief create the guard, using a database id
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explicit DatabaseGuard(TRI_voc_tick_t id);
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/// @brief create the guard, using a database name
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explicit DatabaseGuard(std::string const& name);
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/// @brief destroy the guard
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~DatabaseGuard() {
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TRI_ASSERT(!_vocbase.isDangling());
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_vocbase.release();
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}
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/// @brief return the database pointer
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inline TRI_vocbase_t& database() const { return _vocbase; }
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private:
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/// @brief pointer to database
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TRI_vocbase_t& _vocbase;
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};
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} // namespace arangodb
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#endif
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