public void OnProduceComplete(IAsyncResult asyncResult)
{
//stateList.Add("执行中");
AsyncResult result = (AsyncResult)asyncResult;
ProductDelegate del = (ProductDelegate)result.AsyncDelegate;
string product = del.EndInvoke(asyncResult);
base.Complete(produce.Result, false);
//stateList.Add("执行结束");
}
XInt IFactorialFunction.Factorial(int n)
{
if (n < 0)
{
throw new System.ArgumentOutOfRangeException(
this.Name + ": " + nameof(n) + " >= 0 required, but was " + n);
}
if (n < 2)
{
return(XInt.One);
}
var log2N = XMath.FloorLog2(n);
ProductDelegate prodDelegate = Product;
var results = new IAsyncResult[log2N];
int high = n, low = n >> 1, shift = low, taskCounter = 0;
// -- It is more efficient to add the big intervals
// -- first and the small ones later!
while ((low + 1) < high)
{
results[taskCounter++] = prodDelegate.BeginInvoke(low + 1, high, null, null);
high = low;
low >>= 1;
shift += low;
}
XInt p = XInt.One, r = XInt.One;
while (--taskCounter >= 0)
{
var I = Task.Factory.StartNew(() => r * p);
var t = p * prodDelegate.EndInvoke(results[taskCounter]);
r = I.Result;
p = t;
}
return((r * p) << shift);
}
