mirror of
https://github.com/codership/wsrep-lib.git
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3b3429d8df
Use pointers to pass state objects to service constructors to work around GCC 12 warning error: member ‘wsrep::mock_storage_service::client_state_’ is used uninitialized
121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
/*
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* Copyright (C) 2018 Codership Oy <info@codership.com>
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*
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* This file is part of wsrep-lib.
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*
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* Wsrep-lib 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 2 of the License, or
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* (at your option) any later version.
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*
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* Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "db_storage_engine.hpp"
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#include "db_client.hpp"
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#include <cassert>
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void db::storage_engine::transaction::start(db::client* cc)
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{
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wsrep::unique_lock<wsrep::mutex> lock(se_.mutex_);
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if (se_.transactions_.insert(cc).second == false)
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{
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::abort();
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}
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cc_ = cc;
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}
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void db::storage_engine::transaction::apply(
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const wsrep::transaction& transaction)
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{
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assert(cc_);
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se_.bf_abort_some(transaction);
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}
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void db::storage_engine::transaction::commit(const wsrep::gtid& gtid)
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{
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if (cc_)
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{
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wsrep::unique_lock<wsrep::mutex> lock(se_.mutex_);
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se_.transactions_.erase(cc_);
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se_.store_position(gtid);
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}
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cc_ = nullptr;
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}
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void db::storage_engine::transaction::rollback()
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{
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if (cc_)
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{
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wsrep::unique_lock<wsrep::mutex> lock(se_.mutex_);
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se_.transactions_.erase(cc_);
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}
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cc_ = nullptr;
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}
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void db::storage_engine::bf_abort_some(const wsrep::transaction& txc)
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{
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std::uniform_int_distribution<size_t> uniform_dist(0, alg_freq_);
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wsrep::unique_lock<wsrep::mutex> lock(mutex_);
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if (alg_freq_ && uniform_dist(random_engine_) == 0)
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{
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if (transactions_.empty() == false)
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{
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for (auto victim : transactions_)
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{
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wsrep::client_state& cc(victim->client_state());
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if (cc.mode() == wsrep::client_state::m_local)
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{
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if (victim->bf_abort(txc.seqno()))
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{
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++bf_aborts_;
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}
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break;
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}
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}
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}
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}
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}
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void db::storage_engine::store_position(const wsrep::gtid& gtid)
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{
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validate_position(gtid);
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position_ = gtid;
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}
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wsrep::gtid db::storage_engine::get_position() const
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{
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return position_;
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}
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void db::storage_engine::store_view(const wsrep::view& view)
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{
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view_ = view;
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}
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wsrep::view db::storage_engine::get_view() const
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{
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return view_;
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}
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void db::storage_engine::validate_position(const wsrep::gtid& gtid) const
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{
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if (position_.id() == gtid.id() && gtid.seqno() <= position_.seqno())
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{
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std::ostringstream os;
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os << "Invalid position submitted, position seqno "
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<< position_.seqno()
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<< " is greater than submitted seqno "
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<< gtid.seqno();
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throw wsrep::runtime_error(os.str());
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}
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}
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