private void AddToTagEntries(CacheEntry cacheEntry)
{
if (cacheEntry.Tags != null)
{
var tagEntries = new List <TagEntry>(cacheEntry.Tags.Length);
foreach (object tag in cacheEntry.Tags)
{
TagEntry tagEntry = _tagEntries.GetOrAdd(tag, _ => new TagEntry(cacheEntry));
tagEntry.TryAdd(cacheEntry, 0);
tagEntries.Add(tagEntry);
if (cacheEntry.IsExpired || tagEntry.IsRemoved)
{
if (_cacheEntries.Remove(cacheEntry.Key, cacheEntry))
{
cacheEntry.MarkAsExpired();
}
RemoveFromTagEntries(tagEntries, cacheEntry);
return;
}
}
}
}
private void RemoveLinkedCacheEntries(TagEntry tagEntry)
{
foreach (var cachePair in tagEntry)
{
CacheEntry cacheEntry = cachePair.Key;
if (_cacheEntries.Remove(cacheEntry.Key, cacheEntry))
{
cacheEntry.MarkAsExpired();
RemoveFromAllTagEntries(cacheEntry);
}
}
}
private static void ScanForExpiredEntries(MemoryCache cache)
{
DateTime utcNow = DateTime.UtcNow;
foreach (var cachePair in cache._cacheEntries)
{
object key = cachePair.Key;
CacheEntry cacheEntry = cachePair.Value;
if (cacheEntry.CheckIfExpired(utcNow))
{
if (cache._cacheEntries.Remove(key, cacheEntry))
{
cache.RemoveFromAllTagEntries(cacheEntry);
}
}
}
foreach (var tagPair in cache._tagEntries)
{
object tag = tagPair.Key;
TagEntry tagEntry = tagPair.Value;
if (tagEntry.IsEmpty)
{
if (cache._tagEntries.Remove(tag, tagEntry))
{
tagEntry.MarkAsRemoved();
cache.RemoveLinkedCacheEntries(tagEntry);
}
}
}
Volatile.Write(ref cache._cleanupIsRunning, 0);
}
