* Therefore, if \c head->next is \c NULL or \c tail_prev->prev is \c NULL,
* the list is empty.
*
+ * Do note that this means that the list nodes will contain pointers into the
+ * list structure itself and as a result you may not \c realloc() an \c
+ * exec_list or any structure in which an \c exec_list is embedded.
+ *
* To anyone familiar with "exec lists" on the Amiga, this structure should
* be immediately recognizable. See the following link for the original Amiga
* operating system documentation on the subject.
exec_node_data(__type, (__list)->head, __field), \
* __next = \
exec_node_data(__type, (__node)->__field.next, __field); \
- __next != NULL; \
+ (__node)->__field.next != NULL; \
__node = __next, __next = \
exec_node_data(__type, (__next)->__field.next, __field))
exec_node_data(__type, (__list)->tail_pred, __field), \
* __prev = \
exec_node_data(__type, (__node)->__field.prev, __field); \
- __prev != NULL; \
+ (__node)->__field.prev != NULL; \
__node = __prev, __prev = \
exec_node_data(__type, (__prev)->__field.prev, __field))