private static void addListToHead(PspGeList list)
{
lock (drawListQueue)
{
// The ConcurrentLinkedQueue type doesn't allow adding
// objects directly at the head of the queue.
// This function creates a new array using the given list as it's head
// and constructs a new ConcurrentLinkedQueue based on it.
// The actual drawListQueue is then replaced by this new one.
int arraySize = drawListQueue.size();
if (arraySize > 0)
{
PspGeList[] array = drawListQueue.toArray(new PspGeList[arraySize]);
ConcurrentLinkedQueue <PspGeList> newQueue = new ConcurrentLinkedQueue <PspGeList>();
PspGeList[] newArray = new PspGeList[arraySize + 1];
newArray[0] = list;
for (int i = 0; i < arraySize; i++)
{
newArray[i + 1] = array[i];
newQueue.add(newArray[i]);
}
drawListQueue = newQueue;
}
else
{ // If the queue is empty.
drawListQueue.add(list);
}
}
}