ck_ht: Add ck_ht_reset_size_spmc operation.

The ck_ht_reset_size_spmc operation takes an additional argument
that allows the user to specify the size of the new generation
of the hashtable.

include/ck_ht.h

@@ -253,6 +253,7 @@ bool ck_ht_get_spmc(ck_ht_t *, ck_ht_hash_t, ck_ht_entry_t *);
 bool ck_ht_grow_spmc(ck_ht_t *, uint64_t);
 bool ck_ht_remove_spmc(ck_ht_t *, ck_ht_hash_t, ck_ht_entry_t *);
 bool ck_ht_reset_spmc(ck_ht_t *);
+bool ck_ht_reset_size_spmc(ck_ht_t *, uint64_t);
 uint64_t ck_ht_count(ck_ht_t *);
 
 #endif /* CK_F_PR_LOAD_64 && CK_F_PR_STORE_64 */

src/ck_ht.c

@@ -453,12 +453,12 @@ ck_ht_next(struct ck_ht *table,
 }
 
 bool
-ck_ht_reset_spmc(struct ck_ht *table)
+ck_ht_reset_size_spmc(struct ck_ht *table, uint64_t size)
 {
 	struct ck_ht_map *map, *update;
 
 	map = table->map;
-	update = ck_ht_map_create(table, map->capacity);
+	update = ck_ht_map_create(table, size);
 	if (update == NULL)
 		return false;
 
@@ -467,6 +467,14 @@ ck_ht_reset_spmc(struct ck_ht *table)
 	return true;
 }
 
+bool
+ck_ht_reset_spmc(struct ck_ht *table)
+{
+	struct ck_ht_map *map = table->map;
+
+	return ck_ht_reset_size_spmc(table, map->capacity);
+}
+
 bool
 ck_ht_grow_spmc(ck_ht_t *table, uint64_t capacity)
 {