public CustomList()
{
_head = new CustomNode <TData>();
_tail = new CustomNode <TData>();
_head.Next = _tail;
_tail.Prev = _head;
_enumerator = new Enumerator(this);
}
public bool MoveNext()
{
if (_current.Next != _list._tail)
{
_current = _current.Next;
return(true);
}
return(false);
}
public CustomList <TData> InsertBefore(CustomNode <TData> before, TData val)
{
var node = new CustomNode <TData>();
node.Value = val;
node.Next = before;
node.Prev = before.Prev;
before.Prev.Next = node;
before.Prev = node;
return(this);
}
public CustomList <TData> InsertAfter(CustomNode <TData> after, TData val)
{
var node = new CustomNode <TData>();
node.Value = val;
node.Next = after.Next;
node.Prev = after;
after.Next.Prev = node;
after.Next = node;
return(this);
}
public CustomList <TData> PushFront(TData val)
{
var node = new CustomNode <TData>();
node.Value = val;
node.Prev = _head;
node.Next = _head.Next;
_head.Next.Prev = node;
_head.Next = node;
return(this);
}
public CustomList <TData> PushBack(TData val)
{
var node = new CustomNode <TData>();
node.Value = val;
node.Prev = _tail.Prev;
node.Next = _tail;
_tail.Prev.Next = node;
_tail.Prev = node;
return(this);
}
internal bool HasAlreadyArrived(Message msg)
{
var msgId = msg.MessageId;
lock (_arrivedReliableMessagePerType) {
if (!_arrivedReliableMessagePerType.ContainsKey(msg.Header.Type))
{
var list = new CustomList <MessageCounter>();
_arrivedReliableMessagePerType.Add(msg.Header.Type,
new Pair <CustomList <MessageCounter>, MessageCounter>(list, -1));
}
var pair = _arrivedReliableMessagePerType[msg.Header.Type];
var arrivedMessages = pair.Val1;
var node = arrivedMessages.First;
CustomNode <MessageCounter> res = null;
int pos = 0;
if (msgId >= pair.Val2)
{
if (msgId == pair.Val2)
{
return(true);
}
if (msgId > pair.Val2 + 1)
{
arrivedMessages.PushBack(pair.Val2);
arrivedMessages.PushBack(msgId);
_arrivedReliableMessagePerType[msg.Header.Type].Val2 = msgId;
return(false);
}
_arrivedReliableMessagePerType[msg.Header.Type].Val2 = msgId;
return(false);
}
if (arrivedMessages.Empty)
{
return(true);
}
if (msgId < arrivedMessages.First.Value)
{
return(true);
}
for (int i = 0, count = arrivedMessages.Count; i < count && node.Value <= msgId; i++)
{
if (node.Value == msgId)
{
return(true);
}
if (node.Value < msgId)
{
res = node;
pos = i;
}
node = node.Next;
}
if ((pos & 1) == 1)
{
return(true);
}
else
{
if (res.Value == msgId - 1)
{
if (res.Next.Value == msgId + 1)
{
arrivedMessages.RemoveBetween(res.Prev, res.Next.Next);
}
else
{
res.Value = msgId;
}
}
else if (res.Next.Value == msgId + 1)
{
res.Next.Value = msgId;
}
else
{
arrivedMessages.InsertAfter(res, msgId);
arrivedMessages.InsertAfter(res.Next, msgId);
}
}
return(false);
}
}
public void Reset()
{
_current = _list._head;
}
public Enumerator(CustomList <TData> list)
{
_list = list;
_current = list._head;
}
public CustomList <TData> RemoveBetween(CustomNode <TData> begin, CustomNode <TData> end)
{
begin.Next = end;
end.Prev = begin;
return(this);
}
