lib: introduce bt_message_iterator_class

[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 93d9aa23e122f81d8d0eef56c18bd07b7a3dc389..894a914cb68613cde5eeba2792c46225374af0f9 100644 (file)
--- a/src/lib/graph/message/iterator.h
+++ b/src/lib/graph/message/iterator.h
@@ -36,11 +36,6 @@
 struct bt_port;
 struct bt_graph;
 
-enum bt_message_iterator_type {
-       BT_MESSAGE_ITERATOR_TYPE_SELF_COMPONENT_PORT_INPUT,
-       BT_MESSAGE_ITERATOR_TYPE_PORT_OUTPUT,
-};
-
 enum bt_self_component_port_input_message_iterator_state {
        /* Iterator is not initialized */
        BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_NON_INITIALIZED,
@@ -70,38 +65,39 @@ enum bt_self_component_port_input_message_iterator_state {
        BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_LAST_SEEKING_RETURNED_ERROR,
 };
 
-struct bt_message_iterator {
-       struct bt_object base;
-       enum bt_message_iterator_type type;
-       GPtrArray *msgs;
-};
-
-typedef enum bt_component_class_message_iterator_next_method_status
+typedef enum bt_message_iterator_class_next_method_status
 (*bt_self_component_port_input_message_iterator_next_method)(
                void *, bt_message_array_const, uint64_t, uint64_t *);
 
-typedef enum bt_component_class_message_iterator_seek_ns_from_origin_method_status
+typedef enum bt_message_iterator_class_seek_ns_from_origin_method_status
 (*bt_self_component_port_input_message_iterator_seek_ns_from_origin_method)(
                void *, int64_t);
 
-typedef enum bt_component_class_message_iterator_seek_beginning_method_status
+typedef enum bt_message_iterator_class_seek_beginning_method_status
 (*bt_self_component_port_input_message_iterator_seek_beginning_method)(
                void *);
 
-typedef bt_bool
+typedef enum bt_message_iterator_class_can_seek_ns_from_origin_method_status
 (*bt_self_component_port_input_message_iterator_can_seek_ns_from_origin_method)(
-               void *, int64_t);
+               void *, int64_t, bt_bool *);
 
-typedef bt_bool
+typedef enum bt_message_iterator_class_can_seek_beginning_method_status
 (*bt_self_component_port_input_message_iterator_can_seek_beginning_method)(
-               void *);
+               void *, bt_bool *);
+
+struct bt_self_message_iterator_configuration {
+       bool frozen;
+       bool can_seek_forward;
+};
 
 struct bt_self_component_port_input_message_iterator {
-       struct bt_message_iterator base;
+       struct bt_object base;
+       GPtrArray *msgs;
        struct bt_component *upstream_component; /* Weak */
        struct bt_port *upstream_port; /* Weak */
        struct bt_connection *connection; /* Weak */
        struct bt_graph *graph; /* Weak */
+       struct bt_self_message_iterator_configuration config;
 
        /*
         * Array of
@@ -126,9 +122,13 @@ struct bt_self_component_port_input_message_iterator {
 
        struct {
                bt_self_component_port_input_message_iterator_next_method next;
+
+               /* These two are always both set or both unset. */
                bt_self_component_port_input_message_iterator_seek_ns_from_origin_method seek_ns_from_origin;
-               bt_self_component_port_input_message_iterator_seek_beginning_method seek_beginning;
                bt_self_component_port_input_message_iterator_can_seek_ns_from_origin_method can_seek_ns_from_origin;
+
+               /* These two are always both set or both unset. */
+               bt_self_component_port_input_message_iterator_seek_beginning_method seek_beginning;
                bt_self_component_port_input_message_iterator_can_seek_beginning_method can_seek_beginning;
        } methods;
 
@@ -199,18 +199,6 @@ struct bt_self_component_port_input_message_iterator {
        void *user_data;
 };
 
-struct bt_port_output_message_iterator {
-       struct bt_message_iterator base;
-       struct bt_graph *graph; /* Owned by this */
-       struct bt_component_sink *colander; /* Owned by this */
-
-       /*
-        * Only used temporarily as a bridge between a colander sink and
-        * the user.
-        */
-       uint64_t count;
-};
-
 BT_HIDDEN
 void bt_self_component_port_input_message_iterator_try_finalize(
                struct bt_self_component_port_input_message_iterator *iterator);
@@ -226,19 +214,19 @@ const char *bt_self_component_port_input_message_iterator_state_string(
 {
        switch (state) {
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_ACTIVE:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_ACTIVE";
+               return "ACTIVE";
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_ENDED:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_ENDED";
+               return "ENDED";
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_FINALIZING:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_FINALIZING";
+               return "FINALIZING";
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_FINALIZED:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_FINALIZED";
+               return "FINALIZED";
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_SEEKING:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_SEEKING";
+               return "SEEKING";
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_LAST_SEEKING_RETURNED_AGAIN:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_LAST_SEEKING_RETURNED_AGAIN";
+               return "LAST_SEEKING_RETURNED_AGAIN";
        case BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_LAST_SEEKING_RETURNED_ERROR:
-               return "BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_LAST_SEEKING_RETURNED_ERROR";
+               return "LAST_SEEKING_RETURNED_ERROR";
        default:
                return "(unknown)";
        }