/// <summary>
/// 创建下一层时间轮
/// </summary>
private void CreateNextWheel()
{
if (_nextWheel == null)
{
lock (_lock)
{
// 槽大小是当前时间轮的大小，起始时间是当前时间轮的指针
if (_nextWheel == null)
{
_nextWheel = new TimingWheel(_wheelSpan, _slotCount, _currentNeedle, _taskCount, _delayQueue);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="tickSpan">时间槽大小，毫秒</param>
/// <param name="slotCount">时间槽数量</param>
/// <param name="startMs">起始时间戳，标识时间轮创建时间</param>
private TimingWheelTimer(long tickSpan, int slotCount, long startMs)
{
_timingWheel = new TimingWheel(tickSpan, slotCount, startMs, _taskCount, _delayQueue);
}
