+/* Macro to check for invalid pointers */
+#define RTE_PTR_OR_ERR_RET(ptr, retval) do { \
+ if ((ptr) == NULL) \
+ return retval; \
+} while (0)
+
+/* Macro to check for invalid pointers chains */
+#define RTE_PTR_CHAIN3_OR_ERR_RET(p1, p2, p3, retval, last_retval) do { \
+ RTE_PTR_OR_ERR_RET(p1, retval); \
+ RTE_PTR_OR_ERR_RET(p1->p2, retval); \
+ RTE_PTR_OR_ERR_RET(p1->p2->p3, last_retval); \
+} while (0)
+