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127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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#ident "$Id$"
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/*======
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This file is part of PerconaFT.
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Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
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PerconaFT 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,
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as published by the Free Software Foundation.
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PerconaFT 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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You should have received a copy of the GNU General Public License
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along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
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----------------------------------------
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PerconaFT is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License, version 3,
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as published by the Free Software Foundation.
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PerconaFT 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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
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======= */
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#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
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#pragma once
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#include <db.h>
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#include "db_env.hpp"
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#include "exceptions.hpp"
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namespace ftcxx {
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class DBTxn {
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public:
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DBTxn()
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: _flags(0),
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_txn(nullptr)
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{}
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explicit DBTxn(const DBEnv &env, int flags=0)
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: _flags(flags),
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_txn(nullptr)
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{
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DB_TXN *t;
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int r = env.env()->txn_begin(env.env(), nullptr, &t, _flags);
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handle_ft_retval(r);
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_txn = t;
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}
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DBTxn(const DBEnv &env, const DBTxn &parent, int flags=0)
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: _flags(flags),
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_txn(nullptr)
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{
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DB_TXN *t;
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int r = env.env()->txn_begin(env.env(), parent.txn(), &t, _flags);
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handle_ft_retval(r);
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_txn = t;
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}
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~DBTxn() {
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if (_txn) {
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abort();
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}
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}
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DBTxn(const DBTxn &) = delete;
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DBTxn& operator=(const DBTxn &) = delete;
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DBTxn(DBTxn &&o)
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: _flags(0),
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_txn(nullptr)
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{
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std::swap(_flags, o._flags);
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std::swap(_txn, o._txn);
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}
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DBTxn& operator=(DBTxn &&o) {
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std::swap(_flags, o._flags);
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std::swap(_txn, o._txn);
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return *this;
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}
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DB_TXN *txn() const { return _txn; }
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void commit(int flags=0) {
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int r = _txn->commit(_txn, flags);
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handle_ft_retval(r);
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_txn = nullptr;
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}
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void abort() {
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int r = _txn->abort(_txn);
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handle_ft_retval(r);
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_txn = nullptr;
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}
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bool is_read_only() const {
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return _flags & DB_TXN_READ_ONLY;
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}
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uint64_t id() const {
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if (!_txn) {
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return 0;
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}
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return _txn->id64(_txn);
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}
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private:
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int _flags;
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DB_TXN *_txn;
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};
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} // namespace ftcxx
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