internal static void Add(TList list, TElement item)
{
if (list == null)
{
throw new ArgumentNullException("list");
}
if (item == null)
{
throw new ArgumentNullException("item");
}
list.InvokeInMonitorLock(() => RaiseItemAdded(list, item, item.GetInMonitorLock(() =>
{
ValidateItemOrphaned(list, item);
return(list.GetInChange(() =>
{
long i = list.Count;
RaiseAddingItem(list, item, i);
if (list._firstNode == null)
{
list._firstNode = list._lastNode = item;
list.Count = 1;
}
else
{
list._lastNode._nextNode = item;
list._lastNode = item;
list.Count++;
}
item._container = list;
return i;
}));
})));
}
internal static long IndexOf(TList list, TElement item)
{
if (list == null)
{
throw new ArgumentNullException("list");
}
return(list.GetInMonitorLock(() =>
{
if (item != null && item.GetInMonitorLock(() => item._container != null && ReferenceEquals(item._container, list)))
{
if (item._nextNode == null)
{
return list.Count - 1;
}
long index = -1L;
for (TElement node = list._firstNode; node != null; node = node._nextNode)
{
index++;
if (ReferenceEquals(node, item))
{
return index;
}
}
}
return -1L;
}));
}
internal static bool Contains(TList list, TElement item)
{
if (list == null)
{
throw new ArgumentNullException("list");
}
return(item != null && item.GetInMonitorLock(() => item._container != null && ReferenceEquals(item._container, list)));
}
internal static bool Remove(TList list, TElement item)
{
if (list == null)
{
throw new ArgumentNullException("list");
}
if (item == null)
{
return(false);
}
return(list.GetInMonitorLock(() =>
{
if (list.Count == 0)
{
return false;
}
if (item.GetInMonitorLock(() => item._container == null || !ReferenceEquals(item._container, list)))
{
return false;
}
if (ReferenceEquals(list._firstNode, item))
{
list.InvokeInChange(() =>
{
RaiseRemovingItem(list, item, 0L);
list._firstNode = item._nextNode;
if (list._firstNode == null)
{
list.Count = 0L;
list._lastNode = null;
}
else if (list._firstNode._nextNode == null)
{
list.Count = 1L;
list._lastNode = list._firstNode;
}
else
{
list.Count--;
}
item._container = null;
item._nextNode = null;
});
RaiseItemRemoved(list, item, 0L);
return true;
}
long index = 0L;
TElement previousItem = list._firstNode;
for (TElement node = previousItem._nextNode; node != null; node = node._nextNode)
{
index++;
if (ReferenceEquals(node, item))
{
list.InvokeInChange(() =>
{
RaiseRemovingItem(list, item, index);
previousItem._nextNode = item._nextNode;
if (previousItem._nextNode == null)
{
list._lastNode = previousItem;
}
});
RaiseItemRemoved(list, item, index);
return true;
}
previousItem = node;
}
return false;
}));
}