public override long Pause(long bytes)
{
if (bytes == 1)
{
return 0;
}
// TODO: this is purely instantaneous rate; maybe we
// should also offer decayed recent history one?
long targetNS = LastNS = LastNS + ((long)(bytes * NsPerByte));
long startNS;
long curNS = startNS = DateTime.UtcNow.Ticks * 100 /* ns */;
if (LastNS < curNS)
{
LastNS = curNS;
}
// While loop because Thread.sleep doesn't always sleep
// enough:
while (true)
{
long pauseNS = targetNS - curNS;
if (pauseNS > 0)
{
try
{
Thread.Sleep((int)(pauseNS / 1000000));
}
catch (ThreadInterruptedException ie)
{
throw new ThreadInterruptedException(ie);
}
curNS = DateTime.UtcNow.Ticks * 100;
continue;
}
break;
}
return curNS - startNS;
}
}