feat(lsm): require changes to be committed before writing to persistent

storage

lsm/include/lsm/store.h

@@ -159,6 +159,15 @@ lsm_error lsm_store_open_read(lsm_entry_handle **out, lsm_store *store,
 lsm_error lsm_store_open_write(lsm_entry_handle **out, lsm_store *store,
                                const lsm_str *key);
 
+/**
+ * Commit any changes to the persistent storage. Any changes, insertions or
+ * deletions that occured without a commit are reverted when the handle is
+ * closed.
+ *
+ * @param handle handle to the entry
+ */
+lsm_error lsm_entry_commit(lsm_entry_handle *handle);
+
 /**
  * Close an open entry handle.
  *