Lines Matching refs:NULL
51 if (pred == NULL) { /* This is the first element being inserted. */
52 ((struct qelem *)elem)->q_forw = NULL;
53 ((struct qelem *)elem)->q_back = NULL;
54 } else if (((struct qelem *)pred)->q_forw == NULL) {
57 ((struct qelem *)elem)->q_forw = NULL;
72 if (((struct qelem *)elem)->q_back == NULL) {
74 if (((struct qelem *)elem)->q_forw == NULL)
77 ((struct qelem *)elem)->q_forw->q_back = NULL;
78 } else if (((struct qelem *)elem)->q_forw == NULL) {
80 ((struct qelem *)elem)->q_back->q_forw = NULL;