mirror of
https://github.com/codership/wsrep-lib.git
synced 2025-11-03 05:33:11 +03:00
131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
/*
|
|
* Copyright (C) 2018 Codership Oy <info@codership.com>
|
|
*
|
|
* This file is part of wsrep-lib.
|
|
*
|
|
* Wsrep-lib is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Wsrep-lib is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef WSREP_GTID_HPP
|
|
#define WSREP_GTID_HPP
|
|
|
|
#include "id.hpp"
|
|
#include "seqno.hpp"
|
|
#include "compiler.hpp"
|
|
|
|
#include <iosfwd>
|
|
|
|
/**
|
|
* Minimum number of bytes guaratneed to store GTID string representation,
|
|
* terminating '\0' not included (36 + 1 + 20).
|
|
*/
|
|
#define WSREP_LIB_GTID_C_STR_LEN 57
|
|
|
|
namespace wsrep
|
|
{
|
|
class gtid
|
|
{
|
|
public:
|
|
gtid()
|
|
: id_()
|
|
, seqno_()
|
|
{ }
|
|
gtid(const wsrep::id& id, wsrep::seqno seqno)
|
|
: id_(id)
|
|
, seqno_(seqno)
|
|
{ }
|
|
const wsrep::id& id() const { return id_; }
|
|
wsrep::seqno seqno() const { return seqno_ ; }
|
|
bool is_undefined() const
|
|
{
|
|
return (seqno_.is_undefined() && id_.is_undefined());
|
|
}
|
|
static const wsrep::gtid& undefined()
|
|
{
|
|
return undefined_;
|
|
}
|
|
bool operator==(const gtid& other) const
|
|
{
|
|
return (
|
|
seqno_ == other.seqno_ &&
|
|
id_ == other.id_
|
|
);
|
|
}
|
|
private:
|
|
static const wsrep::gtid undefined_;
|
|
wsrep::id id_;
|
|
wsrep::seqno seqno_;
|
|
};
|
|
|
|
/**
|
|
* Scan a GTID from C string.
|
|
*
|
|
* @param buf Buffer containing the string
|
|
* @param len Length of buffer
|
|
* @param[out] gtid Gtid to be printed to
|
|
*
|
|
* @return Number of bytes scanned, negative value on error.
|
|
*/
|
|
ssize_t scan_from_c_str(const char* buf, size_t buf_len,
|
|
wsrep::gtid& gtid);
|
|
|
|
/*
|
|
* Deprecated version of the above for backwards compatibility.
|
|
* Will be removed when all the superprojects have been updated.
|
|
*/
|
|
static inline ssize_t gtid_scan_from_c_str(const char* buf, size_t buf_len,
|
|
wsrep::gtid& gtid)
|
|
{
|
|
return scan_from_c_str(buf, buf_len, gtid);
|
|
}
|
|
|
|
/**
|
|
* Print a GTID into character buffer.
|
|
*
|
|
* @param gtid GTID to be printed.
|
|
* @param buf Pointer to the beginning of the buffer
|
|
* @param buf_len Buffer length
|
|
*
|
|
* @return Number of characters printed or negative value for error
|
|
*/
|
|
ssize_t print_to_c_str(const wsrep::gtid& gtid, char* buf, size_t buf_len);
|
|
|
|
/*
|
|
* Deprecated version of the above for backwards compatibility.
|
|
* Will be removed when all the superprojects have been updated.
|
|
*/
|
|
static inline ssize_t gtid_print_to_c_str(const wsrep::gtid& gtid,
|
|
char* buf, size_t buf_len)
|
|
{
|
|
return print_to_c_str(gtid, buf, buf_len);
|
|
}
|
|
|
|
/**
|
|
* Return minimum number of chars required to store any GTID.
|
|
*/
|
|
static inline size_t gtid_c_str_len() { return WSREP_LIB_GTID_C_STR_LEN; }
|
|
|
|
/**
|
|
* Overload for ostream operator<<.
|
|
*/
|
|
std::ostream& operator<<(std::ostream&, const wsrep::gtid&);
|
|
|
|
/**
|
|
* Overload for istream operator>>.
|
|
*/
|
|
std::istream& operator>>(std::istream&, wsrep::gtid&);
|
|
}
|
|
|
|
#endif // WSREP_GTID_HPP
|