/// <summary>
/// Specialized Add for PFN cache
/// </summary>
/// <param name="Key">Must be pre-shifted, upper 16 bits are used for ref counting</param>
/// <param name="Value">YOU MAY NOT ENTER FREEKING NULL PAGES INTO THE CACHE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</param>
/// <returns></returns>
public static new bool TryAdd(long Key, long[] Value)
{
if (Value == null)
{
return(false);
}
// leave some wiggle room for other threads so maybe we don't block too much
if ((Global.Count + RemovalRateBar) >= Capacity)
{
var next_remove = (from entry in Global.Keys
where (((entry >> 48) & 0xffff) <= 2) // instead of 2 I should really keep an average ref count
select entry).Take(RemovalRate).AsParallel().All(taken => Global.TryRemove(taken, out OutVar)); // 1% by default
// might be a good idea to reduce the current count of all entries by 1/2 to ensure liveness
// but this whole thing should be relatively short lived I don't foresee a huge population of max-aged items
}
if (UnsafeHelp.IsZero(Value))
{
return(false);
}
return(Global.TryAdd(Key, Value));
}
