Lines Matching refs:NULL

53  *         NULL on lack of memory
61   if (buf != NULL) {
62     buf->p = NULL;
63     buf->ptr = NULL;
77     return NULL;
89   if (buf != NULL) {
90     if (buf->p != NULL) {
92       buf->p = buf->ptr = NULL;
104  *         NULL if no memory could be allocated
109   LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
112   if (buf->p != NULL) {
116   if (buf->p == NULL) {
117      return NULL;
133   LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
134   if (buf->p != NULL) {
137   buf->p = buf->ptr = NULL;
152   LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
153   if (buf->p != NULL) {
157   if (buf->p == NULL) {
158     buf->ptr = NULL;
176   LWIP_ERROR("netbuf_ref: invalid head", (head != NULL), return;);
177   LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
195   LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
196   LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
197   LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
199   if (buf->ptr == NULL) {
220   LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return -1;);
221   if (buf->ptr->next == NULL) {
225   if (buf->ptr->next == NULL) {
241   LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);