mirror of
https://github.com/codership/wsrep-lib.git
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97 lines
2.4 KiB
C++
97 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_KEY_HPP
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#define WSREP_KEY_HPP
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#include "exception.hpp"
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#include "buffer.hpp"
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#include <iosfwd>
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namespace wsrep
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{
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/** @class key
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*
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* Certification key type.
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*/
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class key
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{
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public:
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enum type
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{
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shared,
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reference,
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update,
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exclusive
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};
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key(enum type type)
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: type_(type)
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, key_parts_()
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, key_parts_len_()
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{ }
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/**
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* Append key part to key.
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*
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* @param ptr Pointer to key part data. The caller is supposed to take
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* care that the pointer remains valid over the lifetime
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* if the key object.
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* @param len Length of the key part data.
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*/
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void append_key_part(const void* ptr, size_t len)
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{
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if (key_parts_len_ == 3)
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{
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throw wsrep::runtime_error("key parts exceed maximum of 3");
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}
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key_parts_[key_parts_len_] = wsrep::const_buffer(ptr, len);
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++key_parts_len_;
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}
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enum type type() const
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{
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return type_;
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}
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size_t size() const
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{
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return key_parts_len_;
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}
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const wsrep::const_buffer* key_parts() const
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{
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return key_parts_;
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}
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private:
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enum type type_;
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wsrep::const_buffer key_parts_[3];
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size_t key_parts_len_;
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};
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typedef std::vector<wsrep::key> key_array;
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std::ostream& operator<<(std::ostream&, enum wsrep::key::type);
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std::ostream& operator<<(std::ostream&, const wsrep::key&);
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}
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#endif // WSREP_KEY_HPP
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