void EnterMyLockSpin()
{
for (int i = 0; ; i++)
{
if (i < 3 && smp)
{
Thread.SpinWait(20); // Wait a few dozen instructions to let another processor release lock.
}
else
{
Thread.Sleep(0); // Give up my quantum.
}
if (Interlocked.CompareExchange(ref myLock, 1, 0) == 0)
{
return;
}
}
}