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a8be09161c
The intended purpose for local mode was local storage access without entering replication hooks. However, the same can be achieved with high priority mode. Removed replicating mode and use local instead to denote locally processing clients.
68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
//
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// Copyright (C) 2018 Codership Oy <info@codership.com>
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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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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()
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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::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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wsrep::unique_lock<wsrep::mutex> lock(mutex_);
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if (alg_freq_ && (std::rand() % alg_freq_) == 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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