private int TrimBy <K>(Func <KeyValuePair <T, IValueOrError <R> >, bool> filter, Func <KeyValuePair <T, IValueOrError <R> >, K> selector, Func <K, bool> shouldTrim)
{
var res = 0;
for (var node = _lruList.First; node != null; node = node.Next)
{
var kv = new KeyValuePair <T, IValueOrError <R> >(node.Key, node);
if (filter(kv) && shouldTrim(selector(kv)))
{
LruLinkedList.Remove(ref _lruList, node);
_cache.Remove(node.Key);
res++;
}
}
return(res);
}
private int TrimBy <K>(Func <KeyValuePair <T, IValueOrError <R> >, bool> filter, Func <KeyValuePair <T, IValueOrError <R> >, K> selector, Func <K, bool> shouldTrim)
{
var res = 0;
_lock.EnterWriteLock();
try
{
for (var node = _lruList.First; node != null; node = node.Next)
{
var shouldRemove = false;
if (node.Key.TryGetTarget(out T key))
{
var kv = new KeyValuePair <T, IValueOrError <R> >(key, node);
if (filter(kv) && shouldTrim(selector(kv)))
{
_cache.Remove(key);
shouldRemove = true;
}
}
else
{
shouldRemove = true;
}
if (shouldRemove)
{
LruLinkedList.Remove(ref _lruList, node);
Interlocked.Decrement(ref _count);
res++;
}
}
}
finally
{
_lock.ExitWriteLock();
}
return(res);
}