[HB] Simplify sub-blob support
diff --git a/src/hb-blob.h b/src/hb-blob.h
index 4ea5620..193da1d 100644
--- a/src/hb-blob.h
+++ b/src/hb-blob.h
@@ -65,9 +65,14 @@
void
hb_blob_destroy (hb_blob_t *blob);
+unsigned int
+hb_blob_get_length (hb_blob_t *blob);
+
const char *
-hb_blob_get_data (hb_blob_t *blob,
- unsigned int *length);
+hb_blob_lock (hb_blob_t *blob);
+
+void
+hb_blob_unlock (hb_blob_t *blob);
hb_bool_t
hb_blob_is_writeable (hb_blob_t *blob);
@@ -75,9 +80,8 @@
hb_bool_t
hb_blob_try_writeable_inplace (hb_blob_t *blob);
-/* DANGER: May rebase or nullify */
-void
-hb_blob_make_writeable (hb_blob_t *blob);
+hb_bool_t
+hb_blob_try_writeable (hb_blob_t *blob);
HB_END_DECLS
