Exemplo n.º 1
0
        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);
                }
            }
        }