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-rw-r--r--lib/linklist.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/linklist.h b/lib/linklist.h
index ace6dee3..331135fe 100644
--- a/lib/linklist.h
+++ b/lib/linklist.h
@@ -36,7 +36,12 @@ struct list
{
struct listnode *head;
struct listnode *tail;
+ /* invariant: count is the number of listnodes in the list */
unsigned int count;
+ /*
+ * Returns -1 if val1 < val2, 0 if equal?, 1 if val1 > val2.
+ * Used as definition of sorted for listnode_add_sort
+ */
int (*cmp) (void *val1, void *val2);
void (*del) (void *val);
};