#define LIST_FOREACH(name,i,head) \
for ((i) = (head); (i); (i) = (i)->name##_next)
#define LIST_FOREACH_SAFE(name,i,n,head) \
for ((i) = (head); (i) && (((n) = (i)->name##_next), 1); (i) = (n))
#define LIST_FOREACH(name,i,head) \
for ((i) = (head); (i); (i) = (i)->name##_next)
#define LIST_FOREACH_SAFE(name,i,n,head) \
for ((i) = (head); (i) && (((n) = (i)->name##_next), 1); (i) = (n))