58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
/*
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Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
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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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, for more details.
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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, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef NDB_SCHEMA_TRANS_GUARD_H
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#define NDB_SCHEMA_TRANS_GUARD_H
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#include "storage/ndb/include/ndbapi/NdbDictionary.hpp"
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#include "storage/ndb/plugin/ndb_thd_ndb.h"
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// RAII style class for managing a NDB schema transaction
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class Ndb_schema_trans_guard {
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const Thd_ndb *const m_thd_ndb;
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NdbDictionary::Dictionary *const m_dict;
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// Remember if transaction has been successfully comitted, otherwise
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// it will be aborted when class goes out of scope.
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// NOTE! It's not an error to end a schema trans more than once
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// so there is not much point in keeping more state than this.
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bool m_comitted{false};
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public:
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Ndb_schema_trans_guard(const Thd_ndb *thd_ndb,
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NdbDictionary::Dictionary *dict)
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: m_thd_ndb(thd_ndb), m_dict(dict) {}
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~Ndb_schema_trans_guard() {
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if (!m_comitted) {
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abort_trans();
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}
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}
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bool begin_trans();
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bool commit_trans();
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bool abort_trans();
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};
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#endif
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