/// <summary>
/// constructor
/// </summary>
/// <param name="numSlots">总槽数，越大则槽冲突越小</param>
/// <param name="slotInterval">槽间隔，越小精度越高，单位毫秒</param>
/// <param name="dateTimeProvider">获取当前DateTime的函数</param>
private TimerScheduler(int numSlots, int slotInterval, Func <DateTime> dateTimeProvider)
{
this.slots = new List <TimerNode>(numSlots);
for (int i = 0; i < numSlots; ++i)
{
var node = new TimerNode();
node.LinkSelf();
slots.Add(node);
}
this.tempSlot = new TimerNode();
this.tempSlot.LinkSelf();
this.slotInterval = new TimeSpan(0, 0, 0, 0, slotInterval);
this.DateTimeProvider = dateTimeProvider;
this.startTime = dateTimeProvider();
this.lastFiredSlot = -1;
this.lastFiredTime = this.startTime - this.slotInterval;
var dispatcher = SimpleDispatcher.CurrentDispatcher;
TimerCallback callback = (state) =>
{
dispatcher.Invoke(this.Update);
};
this.updateTimer = new System.Threading.Timer(callback, null,
new TimeSpan(0, 0, 0, 0, slotInterval / 2), new TimeSpan(0, 0, 0, 0, slotInterval));
}
private void Update()
{
var now = DateTimeProvider();
while (lastFiredTime + slotInterval < now)
{
lastFiredTime += slotInterval;
lastFiredSlot = (lastFiredSlot + 1) % slots.Count;
var slot = slots[lastFiredSlot];
while (slot.Next != slot)
{
var timer = slot.Next as Timer;
timer.Unlink();
if (timer.Circles > 0)
{
--timer.Circles;
timer.LinkAfter(tempSlot);
continue;
}
timer.OnTick();
}
if (tempSlot.Next != tempSlot)
{
slots[lastFiredSlot] = tempSlot;
tempSlot = slot;
}
}
}
internal void Unlink()
{
if (Prev != null)
Prev.Next = Next;
if (Next != null)
Next.Prev = Prev;
Prev = null;
Next = null;
}
internal void LinkBefore(TimerNode node)
{
Unlink();
if (node.Prev != null)
{
node.Prev.Next = this;
this.Prev = node.Prev;
}
node.Prev = this;
this.Next = node;
}
internal void LinkAfter(TimerNode node)
{
Unlink();
if (node.Next != null)
{
node.Next.Prev = this;
this.Next = node.Next;
}
node.Next = this;
this.Prev = node;
}
internal void LinkAfter(TimerNode node)
{
Unlink();
if (node.Next != null)
{
node.Next.Prev = this;
this.Next = node.Next;
}
node.Next = this;
this.Prev = node;
}
internal void LinkBefore(TimerNode node)
{
Unlink();
if (node.Prev != null)
{
node.Prev.Next = this;
this.Prev = node.Prev;
}
node.Prev = this;
this.Next = node;
}
internal void Unlink()
{
if (Prev != null)
{
Prev.Next = Next;
}
if (Next != null)
{
Next.Prev = Prev;
}
Prev = null;
Next = null;
}
internal void LinkSelf()
{
Unlink();
Prev = this;
Next = this;
}
internal void LinkSelf()
{
Unlink();
Prev = this;
Next = this;
}