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https://github.com/oxen-io/oxen-core.git
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74 lines
3 KiB
C++
74 lines
3 KiB
C++
// Copyright (c) 2014-2019, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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#pragma once
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#include "cryptonote_core/blockchain.h"
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namespace cryptonote {
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// This class is meant to create a batch when none currently exists.
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// If a batch exists, it can't be from another thread, since we can
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// only be called with the txpool lock taken, and it is held during
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// the whole prepare/handle/cleanup incoming block sequence.
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class LockedTXN {
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public:
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LockedTXN(Blockchain& b) : m_db{b.get_db()} { m_batch = m_db.batch_start(); }
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LockedTXN(const LockedTXN&) = delete;
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LockedTXN& operator=(const LockedTXN&) = delete;
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LockedTXN(LockedTXN&& o) : m_db{o.m_db}, m_batch{o.m_batch} { o.m_batch = false; }
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LockedTXN& operator=(LockedTXN&&) = delete;
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void commit() {
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try {
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if (m_batch) {
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m_db.batch_stop();
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m_batch = false;
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}
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} catch (const std::exception& e) {
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log::warning(globallogcat, "LockedTXN::commit filtering exception: {}", e.what());
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}
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}
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void abort() {
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try {
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if (m_batch) {
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m_db.batch_abort();
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m_batch = false;
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}
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} catch (const std::exception& e) {
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log::warning(globallogcat, "LockedTXN::abort filtering exception: {}", e.what());
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}
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}
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~LockedTXN() { this->abort(); }
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private:
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BlockchainDB& m_db;
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bool m_batch;
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};
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} // namespace cryptonote
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