一段精巧的代码

internal void EnsureThreadRequested()
{
    int num;
    for (int i = this.numOutstandingThreadRequests; i < ThreadPoolGlobals.processorCount; i = num)
    {
        num = Interlocked.CompareExchange(ref this.numOutstandingThreadRequests, i + 1, i);
        if (num == i)
        {
            ThreadPool.AdjustThreadsInPool(1u);
            return;
        }
    }
}