Cat.Util/Cat.IdGenerator/SnowWorkerM1.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Cat.IdGenerator
{
   /// <summary>
   /// 雪花漂移算法
   /// </summary> 
   internal class SnowWorkerM1 : ISnowWorker
   {
      /// <summary>
      /// 基础时间
      /// </summary>
      protected readonly DateTime StartTimeUtc = new DateTime(2020, 2, 20, 2, 20, 2, 20, DateTimeKind.Utc);

      /// <summary>
      /// 机器码
      /// </summary>
      protected readonly ushort WorkerId = 0;

      /// <summary>
      /// 机器码位长
      /// （机器码+序列数<=22位）
      /// </summary>
      protected readonly byte WorkerIdBitLength = 0;

      /// <summary>
      /// 自增序列数位长
      /// （机器码+序列数<=22位）
      /// </summary>
      protected readonly byte SeqBitLength = 0;

      /// <summary>
      /// 最大序列数（含此值）
      /// 超过最大值，就会从MinSeqNumber开始
      /// </summary>
      protected readonly int MaxSeqNumber = 0;

      /// <summary>
      /// 最小序列数（含此值）
      /// </summary>
      protected readonly ushort MinSeqNumber = 0;

      /// <summary>
      /// 最大漂移次数
      /// </summary>
      protected readonly int TopOverCostCount = 0;

      protected readonly byte _TimestampShift = 0;
      protected static object _SyncLock = new object();

      protected ushort _CurrentSeqNumber;
      protected long _LastTimeTick = -1L;
      protected long _TurnBackTimeTick = -1L;

      protected bool _IsOverCost = false;
      protected int _OverCostCountInOneTerm = 0;