public void Remove(LruListItem <TKey, TValue> item)
{
if (Head == item || Tail == item)
{
if (Head == item)
{
Head = item.Next;
if (Head != null)
{
Head.Previous = null;
}
}
if (Tail == item)
{
Tail = item.Previous;
if (Tail != null)
{
Tail.Next = null;
}
}
}
else
{
item.Previous.Next = item.Next;
item.Next.Previous = item.Previous;
}
item.Previous = null;
item.Next = null;
}
public void Add(LruListItem <TKey, TValue> item)
{
if (Head == null)
{
Head = item;
Tail = item;
item.Previous = null;
item.Next = null;
}
else
{
Head.Previous = item;
item.Next = Head;
item.Previous = null;
Head = item;
}
}
public void Add(LruListItem <TKey, TValue> item)
{
if (Head == null)
{
Head = item;
Tail = item;
item.Previous = null;
item.Next = null;
}
else
{
Head.Previous = item;
item.Next = Head;
item.Previous = null;
Head = item;
}
#pragma warning disable CS0618 // Type or member is obsolete
item.LastTouchedTimestamp = AWSSDKUtils.CorrectedUtcNow;
#pragma warning restore CS0618 // Type or member is obsolete
}
public void AddOrUpdate(TKey key, TValue value)
{
lock (cacheLock)
{
if (cache.TryGetValue(key, out LruListItem <TKey, TValue> value2))
{
value2.Value = value;
lruList.Touch(value2);
}
else
{
LruListItem <TKey, TValue> lruListItem = new LruListItem <TKey, TValue>(key, value);
while (cache.Count >= MaxEntries)
{
cache.Remove(lruList.EvictOldest());
}
lruList.Add(lruListItem);
cache.Add(key, lruListItem);
}
}
}
/// <summary>
/// Add the key/value pair to the cache, or update
/// the value if the key already exists.
///
/// If the cache is full, evicts the least recently used item.
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public void AddOrUpdate(TKey key, TValue value)
{
lock (cacheLock)
{
LruListItem <TKey, TValue> existingLruListItem;
if (cache.TryGetValue(key, out existingLruListItem))
{
// update
existingLruListItem.Value = value;
lruList.Touch(existingLruListItem);
}
else
{
// add
var newLruListItem = new LruListItem <TKey, TValue>(key, value);
while (cache.Count >= MaxEntries)
{
cache.Remove(lruList.EvictOldest());
}
lruList.Add(newLruListItem);
cache.Add(key, newLruListItem);
}
}
}
internal void Clear()
{
Head = null;
Tail = null;
}
public void Touch(LruListItem <TKey, TValue> item)
{
Remove(item);
Add(item);
}
