X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf%2Fiterator.h;h=1071def852749d3a4abee44a346e2280dd2d7452;hp=8f9af0e19e3b8af855f2e3fae71200014b8af16c;hb=c50d2a7af8f63f3f4d2c0a6fce9a6e214d2baeda;hpb=17e0c86ea65fcfef51592628e35efc27392638f2

diff --git a/include/babeltrace/ctf/iterator.h b/include/babeltrace/ctf/iterator.h
index 8f9af0e1..1071def8 100644
--- a/include/babeltrace/ctf/iterator.h
+++ b/include/babeltrace/ctf/iterator.h
@@ -39,10 +39,17 @@ struct bt_ctf_event;
  * By default, if begin_pos is NULL, a BT_SEEK_CUR is performed at
  * creation. By default, if end_pos is NULL, a BT_SEEK_END (end of
  * trace) is the EOF criterion.
+ *
+ * Return a pointer to the newly allocated iterator.
+ *
+ * Only one iterator can be created against a context. If more than one
+ * iterator is being created for the same context, the second creation
+ * will return NULL. The previous iterator must be destroyed before
+ * creation of the new iterator for this function to succeed.
  */
 struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx,
-		struct bt_iter_pos *begin_pos,
-		struct bt_iter_pos *end_pos);
+		const struct bt_iter_pos *begin_pos,
+		const struct bt_iter_pos *end_pos);
 
 /*
  * bt_ctf_get_iter - get iterator from ctf iterator.