#include "map.h"
typedef struct sl skiplist_t;
+typedef struct sl_iter sl_iter_t;
-skiplist_t * sl_alloc (const datatype_t *key_type);
-uint64_t sl_cas (skiplist_t *sl, void *key, uint64_t expected_val, uint64_t new_val);
-uint64_t sl_lookup (skiplist_t *sl, void *key);
-uint64_t sl_remove (skiplist_t *sl, void *key);
-uint64_t sl_count (skiplist_t *sl);
-void sl_print (skiplist_t *sl);
-void sl_free (skiplist_t *sl);
-void * sl_min_key(skiplist_t *sl);
+skiplist_t *sl_alloc (const datatype_t *key_type);
+uint64_t sl_cas (skiplist_t *sl, void *key, uint64_t expected_val, uint64_t new_val);
+uint64_t sl_lookup (skiplist_t *sl, void *key);
+uint64_t sl_remove (skiplist_t *sl, void *key);
+uint64_t sl_count (skiplist_t *sl);
+void sl_print (skiplist_t *sl);
+void sl_free (skiplist_t *sl);
+void * sl_min_key (skiplist_t *sl);
+
+sl_iter_t *sl_iter_start (skiplist_t *sl, void *key);
+sl_iter_t *sl_iter_next (sl_iter_t *iter);
+uint64_t sl_iter_val (sl_iter_t *iter);
+void * sl_iter_key (sl_iter_t *iter);
static const map_impl_t sl_map_impl = {
(map_alloc_t)sl_alloc, (map_cas_t)sl_cas, (map_get_t)sl_lookup, (map_remove_t)sl_remove,