internal HistoryEntry[] Select(GaugeDuration duration, DateTime currentDate)
{
if (!duration.IsInfinity)
{
if (duration.IsTimeBased)
{
DateTime fromDate = currentDate - duration.ToTimeSpan();
return(Select(fromDate, currentDate));
}
return(Select((int)duration.Count));
}
return(Select());
}
internal void Truncate(GaugeDuration d)
{
if (d.IsInfinity)
{
return;
}
if (d.IsEmpty)
{
lock (this)
{
Clear();
}
return;
}
if (d.IsCountBased)
{
if (!((double)base.Count > d.Count))
{
return;
}
lock (this)
{
while ((double)base.Count > d.Count)
{
RemoveAt(0);
}
}
return;
}
DateTime t = Top.Timestamp - d.ToTimeSpan();
if (!(this[0].Timestamp < t))
{
return;
}
lock (this)
{
while (this[0].Timestamp < t)
{
RemoveAt(0);
}
}
}
internal void Extend(GaugeDuration extend, DateTime topDate, DateTime btmDate)
{
if (extend.IsInfinity)
{
DurationType = DurationType.Infinite;
}
else if (extend.IsCountBased && Count < extend.Count)
{
Count = extend.Count;
}
else if (extend.IsTimeBased)
{
DateTime t = topDate - extend.ToTimeSpan();
if (btmDate > t)
{
Count++;
}
}
}