goSnowFlake

const (
	CEpoch          = 1546272000000 // Start timestamp 2019-01-01 00:00:00
	CWorkerIdBits   = 5             // Num of WorkerId Bits
	CDataCenterBits = 5             // Num of DataCentId Bits
	CSequenceBits   = 12            // Num of Sequence Bits

	CWorkerIdShift   = CSequenceBits
	CDataCenterShift = CWorkerIdShift + CWorkerIdBits
	CTimeStampShift  = CDataCenterShift + CDataCenterBits

	CMaxWorker     = -1 ^ (-1 << CWorkerIdBits)
	CMaxDataCenter = -1 ^ (-1 << CDataCenterBits)
	CSequenceMask  = -1 ^ (-1 << CSequenceBits)
)