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102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
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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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#include <db.h>
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#include "txnid_set.h"
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namespace toku {
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int find_by_txnid(const TXNID &txnid_a, const TXNID &txnid_b);
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int find_by_txnid(const TXNID &txnid_a, const TXNID &txnid_b) {
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if (txnid_a < txnid_b) {
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return -1;
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} else if (txnid_a == txnid_b) {
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return 0;
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} else {
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return 1;
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}
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}
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void txnid_set::create(void) {
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// lazily allocate the underlying omt, since it is common
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// to create a txnid set and never put anything in it.
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m_txnids.create_no_array();
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}
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void txnid_set::destroy(void) {
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m_txnids.destroy();
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}
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// Return true if the given transaction id is a member of the set.
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// Otherwise, return false.
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bool txnid_set::contains(TXNID txnid) const {
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TXNID find_txnid;
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int r = m_txnids.find_zero<TXNID, find_by_txnid>(txnid, &find_txnid, nullptr);
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return r == 0 ? true : false;
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}
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// Add a given txnid to the set
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void txnid_set::add(TXNID txnid) {
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int r = m_txnids.insert<TXNID, find_by_txnid>(txnid, txnid, nullptr);
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invariant(r == 0 || r == DB_KEYEXIST);
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}
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// Delete a given txnid from the set.
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void txnid_set::remove(TXNID txnid) {
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uint32_t idx;
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int r = m_txnids.find_zero<TXNID, find_by_txnid>(txnid, nullptr, &idx);
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if (r == 0) {
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r = m_txnids.delete_at(idx);
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invariant_zero(r);
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}
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}
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// Return the size of the set
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size_t txnid_set::size(void) const {
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return m_txnids.size();
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}
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// Get the ith id in the set, assuming that the set is sorted.
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TXNID txnid_set::get(size_t i) const {
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TXNID txnid;
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int r = m_txnids.fetch(i, &txnid);
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invariant_zero(r);
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return txnid;
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}
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} /* namespace toku */
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