public object GetOrAdd(object key, object value)
{
var keyref = new WeakKeyRef(key, refq);
writeLock.@lock();
try
{
DiscardWriteLocked();
object key2;
var keyref2 = (WeakKeyRef)map.get(keyref);
if (keyref2 != null && (key2 = keyref2.get()) != null)
{
value = keyref2.value;
}
else if (value != null)
{
keyref.value = value;
map.put(keyref, keyref);
}
}
finally
{
writeLock.unlock();
}
return(value);
}
public void Add(TKey key, TValue value)
{
var weakKey = new WeakKeyRef <TKey>(key, this.comparer);
var weakValue = new SafeWeakRef <TValue>(value);
dictionary.Add(weakKey, weakValue);
}
public int GetHashCode(object obj)
{
WeakKeyRef <T> weakKey = obj as WeakKeyRef <T>;
if (weakKey != null)
{
return(weakKey.HashCode);
}
return(this.comparer.GetHashCode((T)obj));
}
private static T GetTarget(object obj, out bool isDead)
{
WeakKeyRef <T> wref = obj as WeakKeyRef <T>;
T target;
if (wref != null)
{
target = wref.Target;
isDead = !wref.IsAlive;
}
else
{
target = (T)obj;
isDead = false;
}
return(target);
}
public TValue this[TKey key]
{
get
{
TValue result;
if (TryGetValue(key, out result))
{
return(result);
}
else
{
throw new KeyNotFoundException();
}
}
set
{
var weakKey = new WeakKeyRef <TKey>(key, comparer);
this.dictionary[weakKey] = new SafeWeakRef <TValue>(value);
}
}
