public static void Sleep(OsState os, TimeSpan time)
{
if (time == new TimeSpan(0))
{
return;
}
TickManager tickManager = os.GetTickManager();
// Attempt to avoid overflow by doing the addition unsigned
ulong currentTick = (ulong)tickManager.GetTick().GetInt64Value();
ulong timeoutTick = (ulong)tickManager.ConvertToTick(time).GetInt64Value();
ulong absoluteEndTick = currentTick + timeoutTick + 1;
var endTick = new Tick((long)Math.Min(long.MaxValue, absoluteEndTick));
Tick curTick = tickManager.GetTick();
// Sleep in a loop until the requested time has past.
while (curTick < endTick)
{
Tick remaining = endTick - curTick;
int sleepTimeMs = (int)ConvertToImplTime(os, remaining).GetMilliSeconds();
System.Threading.Thread.Sleep(sleepTimeMs);
curTick = tickManager.GetTick();
}
}
public static TimeSpan ConvertToImplTime(OsState os, Tick tick)
{
TickManager tickManager = os.GetTickManager();
TimeSpan ts = tickManager.ConvertToTimespan(tick);
// .NET allows sleeping up to int.MaxValue milliseconds at a time.
long timeMs = Math.Min(int.MaxValue, ts.GetMilliSeconds());
return(TimeSpan.FromMilliSeconds(timeMs));
}
public TimeoutHelper(OsState os, TimeSpan timeout)
{
_os = os;
if (timeout == new TimeSpan(0))
{
// If timeout is zero, don't do relative tick calculations.
_endTick = new Tick(0);
}
else
{
TickManager tickManager = os.GetTickManager();
// Attempt to avoid overflow by doing the addition unsigned
ulong currentTick = (ulong)tickManager.GetTick().GetInt64Value();
ulong timeoutTick = (ulong)tickManager.ConvertToTick(timeout).GetInt64Value();
ulong absoluteEndTick = currentTick + timeoutTick + 1;
_endTick = new Tick((long)Math.Min(long.MaxValue, absoluteEndTick));
}
}
// Todo: Use configuration object if/when more options are added
public OsResourceManager(ITickGenerator tickGenerator)
{
TickManager = new TickManager(tickGenerator);
}