public void Clear(ConcurrentHashtable <TStored, TSearch> traits)
{
var oldList = _List;
_List = new TStored[4];
var effect = _List.Length - oldList.Length;
if (effect != 0)
{
traits.EffectTotalAllocatedSpace(effect);
}
_Count = 0;
}
/// <summary>
/// When segment gets removed from hashtable then its allocated space should be subtracted to the
/// total allocated space.
/// Single threaded access or locking is needed
/// </summary>
/// <param name="traits"></param>
public void Bye(ConcurrentHashtable <TStored, TSearch> traits)
{
traits.EffectTotalAllocatedSpace(-_List.Length);
_List = null;
}
/// <summary>
/// When segment gets introduced into hashtable then its allocated space should be added to the
/// total allocated space.
/// Single threaded access or locking is needed
/// </summary>
/// <param name="traits"></param>
public void Welcome(ConcurrentHashtable <TStored, TSearch> traits)
{
traits.EffectTotalAllocatedSpace(_List.Length);
}
protected virtual void ResizeList(ConcurrentHashtable <TStored, TSearch> traits)
{
var oldList = _List;
var oldListLength = oldList.Length;
var newListLength = 2;
while (newListLength < _Count)
{
newListLength <<= 1;
}
newListLength <<= 1;
if (newListLength != oldListLength)
{
_List = new TStored[newListLength];
var mask = (UInt32)(newListLength - 1);
for (int i = 0; i != oldListLength; ++i)
{
if (!traits.IsEmpty(ref oldList[i]))
{
var searchHash = traits.GetItemHashCode(ref oldList[i]);
//j is prefered insertion pos in new list.
var j = searchHash & mask;
if (traits.IsEmpty(ref _List[j]))
{
_List[j] = oldList[i];
}
else
{
var firstHash = traits.GetItemHashCode(ref _List[j]);
var storedItemHash = firstHash;
var searchHashDiff = (searchHash - firstHash) & mask;
while (true)
{
j = (j + 1) & mask;
if (traits.IsEmpty(ref _List[j]))
{
_List[j] = oldList[i];
break;
}
storedItemHash = traits.GetItemHashCode(ref _List[j]);
if (((storedItemHash - firstHash) & mask) > searchHashDiff)
{
InsertItemAtIndex(mask, j, oldList[i], traits);
break;
}
}
}
}
}
traits.EffectTotalAllocatedSpace(newListLength - oldListLength);
}
}