// Token: 0x06007700 RID: 30464 RVA: 0x002200BC File Offset: 0x0021E2BC
internal bool Purge()
{
int count = this._inactiveViewTables.Count;
if (count > 0)
{
ViewTable[] array = new ViewTable[count];
this._inactiveViewTables.Keys.CopyTo(array, 0);
for (int i = 0; i < count; i++)
{
ViewTable key = array[i];
int num = (int)this._inactiveViewTables[key];
if (--num > 0)
{
this._inactiveViewTables[key] = num;
}
else
{
this._inactiveViewTables.Remove(key);
}
}
}
ArrayList arrayList = new ArrayList();
bool flag = false;
foreach (object obj in this)
{
DictionaryEntry dictionaryEntry = (DictionaryEntry)obj;
WeakRefKey weakRefKey = (WeakRefKey)dictionaryEntry.Key;
CollectionRecord collectionRecord = (CollectionRecord)dictionaryEntry.Value;
if (weakRefKey.Target == null || !collectionRecord.IsAlive)
{
arrayList.Add(weakRefKey);
}
else
{
ViewTable viewTable = collectionRecord.ViewTable;
if (viewTable != null && viewTable.Purge())
{
flag = true;
if (viewTable.Count == 0)
{
collectionRecord.ViewTable = null;
if (!collectionRecord.IsAlive)
{
arrayList.Add(weakRefKey);
}
}
}
}
}
for (int j = 0; j < arrayList.Count; j++)
{
base.Remove(arrayList[j]);
}
return(arrayList.Count > 0 || flag);
}
// purge the table of dead entries
internal bool Purge()
{
// decrease the expiration dates of ViewTables on the inactive
// list, and remove the ones that have expired.
int n = _inactiveViewTables.Count;
if (n > 0)
{
ViewTable[] keys = new ViewTable[n];
_inactiveViewTables.Keys.CopyTo(keys, 0);
for (int i = 0; i < n; ++i)
{
ViewTable vt = keys[i];
int expirationDate = (int)_inactiveViewTables[vt];
if (--expirationDate > 0)
{
_inactiveViewTables[vt] = expirationDate;
}
else
{
_inactiveViewTables.Remove(vt);
}
}
}
// purge the table of entries whose collection has been GC'd.
ArrayList al = new ArrayList();
bool foundViewTableDirt = false;
foreach (DictionaryEntry de in this)
{
WeakRefKey key = (WeakRefKey)de.Key;
CollectionRecord cr = (CollectionRecord)de.Value;
if (key.Target == null || !cr.IsAlive)
{
al.Add(key);
}
else
{
// also purge ViewTable entries whose key (CVS) has been GC'd
ViewTable vt = cr.ViewTable;
if (vt != null && vt.Purge())
{
foundViewTableDirt = true;
if (vt.Count == 0)
{
// remove the ViewTable (it has no views remaining)
cr.ViewTable = null;
if (!cr.IsAlive)
{
al.Add(key);
}
}
}
}
}
for (int k = 0; k < al.Count; ++k)
{
this.Remove(al[k]);
}
return(al.Count > 0 || foundViewTableDirt);
}
