public void add(ISystem system, int priority)
{
priority = priority == -1 ? system.defaultPriority : priority;
Debug.Assert(priority != -1);
SystemNode newNode = new SystemNode(system, priority);
if (_head == null)
{
_head = newNode;
}
else
{
int countBefore = count;
SystemNode current = _head;
while (current.next != null)
{
if (current.next.priority > priority)
{
break;
}
current = current.next;
}
current.insert(newNode);
int countAfter = count;
Debug.Assert(countAfter == countBefore + 1);
}
Logger.log(string.Format("Added {0} system to SystemManager.", system.systemType));
}
public void insert(SystemNode node)
{
if (_next != null)
{
_next.previous = node;
}
node.previous = this;
node.next = _next;
_next = node;
}
public void remove()
{
if (_previous != null)
{
_previous.next = _next;
}
if (_next != null)
{
_next.previous = _previous;
}
_previous = null;
_next = null;
_system = null;
}