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46 lines
2.1 KiB
C
46 lines
2.1 KiB
C
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///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 F4EXB //
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// written by Edouard Griffiths //
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// //
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// Object unique id calculator loosely inspired by MongoDB object id //
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// //
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// This program 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 as version 3 of the License, or //
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// //
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// This program 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 V3 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 this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef SDRBASE_UTIL_UID_H_
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#define SDRBASE_UTIL_UID_H_
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#include <stdint.h>
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class UidCalculator
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{
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public:
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/**
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* Get a new object unique Id. It is the addition of:
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* - 6 digit microseconds in current second
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* - 4 byte Unix epoch multiplied by 1000000
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*/
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static uint64_t getNewObjectId();
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/**
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* Get a new instance unique Id. It is made of from LSB to MSB:
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* - 2 byte process id
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* - 2 byte hashed host name
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*/
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static uint32_t getNewInstanceId();
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private:
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static uint64_t getCurrentMiroseconds();
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};
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#endif /* SDRBASE_UTIL_UID_H_ */
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