56     T *front;  variable
98     front = NULL;  in Ril_queue()
109     temp = this->front;  in dequeue()
110     if(NULL != this->front->p_next) {  in dequeue()
111         this->front = this->front->p_next;  in dequeue()
113         this->front = NULL;  in dequeue()
125     if(NULL == this->front) {  in enqueue()
126         this->front = request;  in enqueue()
129         request->p_next = this->front;  in enqueue()
130         this->front = request;  in enqueue()
143     for(T **ppCur = &(this->front); *ppCur != NULL; ppCur = &((*ppCur)->p_next)) {  in checkAndDequeue()
162     if(this->front == NULL) {  in empty()