/// <summary>
/// Processes queued requests as a coroutine.
/// </summary>
/// <param name="maxMillisecondsPerFrame">The maximum milliseconds per frame before yielding.</param>
/// <returns>
/// coroutine enumerator
/// </returns>
/// <exception cref="System.InvalidOperationException">Cannot process as coroutine when set to async operation.</exception>
public IEnumerator ProcessRequests(int maxMillisecondsPerFrame)
{
if (this.runAsync)
{
throw new InvalidOperationException("Cannot process as coroutine when set to async operation.");
}
while (!this.runAsync)
{
var next = GetNext();
if (next == null)
{
yield return(null);
}
else
{
_stopwatch.Start();
next = _directPather.ResolveDirectPath(next);
if (_stopwatch.ElapsedMilliseconds > maxMillisecondsPerFrame)
{
_stopwatch.Reset();
yield return(null);
}
if (next == null)
{
continue;
}
var run = true;
var subIter = _engine.ProcessRequestCoroutine(next);
while (run)
{
//Start is called multiple places, due to the enumeration going on in various loops. Start is safe to call multiple times, it will simply do nothing if already started.
_stopwatch.Start();
run = subIter.MoveNext();
if (_stopwatch.ElapsedMilliseconds > maxMillisecondsPerFrame)
{
_stopwatch.Reset();
yield return(null);
}
}
}
}
}
