internal _ThreadSafeDictionaryNode(int hashCode, TKey key, TValue value, _ThreadSafeDictionaryNode <TKey, TValue> nextNode)
{
_hashCode = hashCode;
_key = key;
_value = value;
_nextNode = nextNode;
}
/// <summary>
/// Gets a value for a given key or creates a new one using the given
/// createValue delegate.
/// </summary>
public TValue GetOrCreateValue(TKey key, Func <TKey, TValue> createValue)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
if (createValue == null)
{
createValue = ValueConstructorDelegate <TKey, TValue> .GetDefault();
}
var owner = _GetOwner();
var comparer = owner._comparer;
int hashCode = owner._comparer.GetHashCode(key) & int.MaxValue;
int bucketIndex = hashCode % owner._buckets.Length;
TValue result;
if (owner._TryGetValue(hashCode, key, out result))
{
return(result);
}
result = createValue(key);
if (owner._count >= owner._buckets.Length * 2)
{
owner._Resize();
bucketIndex = hashCode % owner._buckets.Length;
}
var newNode = new _ThreadSafeDictionaryNode <TKey, TValue>(hashCode, key, result, owner._buckets[bucketIndex]);
owner._buckets[bucketIndex] = newNode;
owner._count++;
return(result);
}