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-rw-r--r--src/hashtable.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/hashtable.h b/src/hashtable.h
index 514cfec..1b6976d 100644
--- a/src/hashtable.h
+++ b/src/hashtable.h
@@ -43,7 +43,8 @@ typedef struct hashtable_t {
hashtable_t* hash_table_new(hash_func_t hash_func, compare_func_t compare_func, free_func_t free_func);
void hash_table_destroy(hashtable_t *ht);
-void hash_table_insert(hashtable_t* ht, void *key, void *value);
+/* returns 0 on success, -1 on error (invalid argument or out of memory) */
+int hash_table_insert(hashtable_t* ht, void *key, void *value);
void* hash_table_lookup(hashtable_t* ht, void *key);
void hash_table_remove(hashtable_t* ht, void *key);