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105 lines
2.4 KiB
C++
105 lines
2.4 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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#ifndef WSREP_SEQNO_HPP
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#define WSREP_SEQNO_HPP
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#include <iosfwd>
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namespace wsrep
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{
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/** @class seqno
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*
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* Sequence number type.
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*/
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class seqno
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{
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public:
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typedef long long native_type;
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seqno()
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: seqno_(-1)
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{ }
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explicit seqno(long long seqno)
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: seqno_(seqno)
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{ }
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long long get() const
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{
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return seqno_;
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}
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bool is_undefined() const
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{
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return (seqno_ == -1);
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}
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wsrep::seqno prev() const
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{
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return seqno{seqno_ - 1};
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}
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bool operator<(seqno other) const
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{
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return (seqno_ < other.seqno_);
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}
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bool operator>(seqno other) const
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{
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return (seqno_ > other.seqno_);
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}
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bool operator<=(seqno other) const
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{
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return !(seqno_ > other.seqno_);
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}
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bool operator>=(seqno other) const
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{
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return !(seqno_ < other.seqno_);
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}
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bool operator==(seqno other) const
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{
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return (seqno_ == other.seqno_);
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}
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bool operator!=(seqno other) const
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{
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return !(seqno_ == other.seqno_);
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}
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seqno operator+(seqno other) const
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{
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return (seqno(seqno_ + other.seqno_));
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}
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seqno operator+(long long other) const
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{
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return (*this + seqno(other));
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}
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static seqno undefined() { return seqno(-1); }
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private:
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native_type seqno_;
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};
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std::ostream& operator<<(std::ostream& os, wsrep::seqno seqno);
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}
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#endif // WSREP_SEQNO_HPP
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