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26 lines
518 B
C++
26 lines
518 B
C++
#pragma once
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#include <Common/UInt128.h>
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#include <common/strong_typedef.h>
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#include <Common/thread_local_rng.h>
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namespace DB
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{
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STRONG_TYPEDEF(UInt128, UUID)
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namespace UUIDHelpers
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{
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inline UUID generateV4()
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{
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UInt128 res{thread_local_rng(), thread_local_rng()};
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res.low = (res.low & 0xffffffffffff0fffull) | 0x0000000000004000ull;
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res.high = (res.high & 0x3fffffffffffffffull) | 0x8000000000000000ull;
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return UUID{res};
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}
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const UUID Nil = UUID(UInt128(0, 0));
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}
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}
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