lib: create input port msg iterator from self {msg iterator, sink comp.}

[babeltrace.git] / src / lib / graph / message / iterator.h

diff --git a/src/lib/graph/message/iterator.h b/src/lib/graph/message/iterator.h
index b8a9dfa2f65e090cb0cd7840360d66e4ba261ffe..93d9aa23e122f81d8d0eef56c18bd07b7a3dc389 100644 (file)
--- a/src/lib/graph/message/iterator.h
+++ b/src/lib/graph/message/iterator.h
@@ -103,6 +103,27 @@ struct bt_self_component_port_input_message_iterator {
        struct bt_connection *connection; /* Weak */
        struct bt_graph *graph; /* Weak */
 
+       /*
+        * Array of
+        * `struct bt_self_component_port_input_message_iterator *`
+        * (weak).
+        *
+        * This is an array of upstream message iterators on which this
+        * iterator depends. The references are weak: an upstream
+        * message iterator is responsible for removing its entry within
+        * this array on finalization/destruction.
+        */
+       GPtrArray *upstream_msg_iters;
+
+       /*
+        * Downstream message iterator which depends on this message
+        * iterator (weak).
+        *
+        * This can be `NULL` if this message iterator's owner is a sink
+        * component.
+        */
+       struct bt_self_component_port_input_message_iterator *downstream_msg_iter;
+
        struct {
                bt_self_component_port_input_message_iterator_next_method next;
                bt_self_component_port_input_message_iterator_seek_ns_from_origin_method seek_ns_from_origin;