ir: add weak reference to parent trace to bt_ctf_stream_class

[babeltrace.git] / formats / ctf / ir / stream-class.c

diff --git a/formats/ctf/ir/stream-class.c b/formats/ctf/ir/stream-class.c
index 0f823ea7aab6e209d9cc4811152ba4739a54ca37..22ea8a5db6628d819153026dd8201b98487d345d 100644 (file)
--- a/formats/ctf/ir/stream-class.c
+++ b/formats/ctf/ir/stream-class.c
@@ -220,6 +220,50 @@ end:
        return ret;
 }
 
+static
+void event_class_exists(gpointer element, gpointer query)
+{
+       struct bt_ctf_event_class *event_class_a = element;
+       struct search_query *search_query = query;
+       struct bt_ctf_event_class *event_class_b = search_query->value;
+       int64_t id_a, id_b;
+
+       if (search_query->value == element) {
+               search_query->found = 1;
+               goto end;
+       }
+
+       /*
+        * Two event classes cannot share the same name in a given
+        * stream class.
+        */
+       if (!strcmp(bt_ctf_event_class_get_name(event_class_a),
+                       bt_ctf_event_class_get_name(event_class_b))) {
+               search_query->found = 1;
+               goto end;
+       }
+
+       /*
+        * Two event classes cannot share the same ID in a given
+        * stream class.
+        */
+       id_a = bt_ctf_event_class_get_id(event_class_a);
+       id_b = bt_ctf_event_class_get_id(event_class_b);
+
+       if (id_a < 0 || id_b < 0) {
+               /* at least one ID is not set: will be automatically set later */
+               goto end;
+       }
+
+       if (id_a == id_b) {
+               search_query->found = 1;
+               goto end;
+       }
+
+end:
+       return;
+}
+
 int bt_ctf_stream_class_add_event_class(
                struct bt_ctf_stream_class *stream_class,
                struct bt_ctf_event_class *event_class)
@@ -234,7 +278,8 @@ int bt_ctf_stream_class_add_event_class(
 
        /* Check for duplicate event classes */
        struct search_query query = { .value = event_class, .found = 0 };
-       g_ptr_array_foreach(stream_class->event_classes, value_exists, &query);
+       g_ptr_array_foreach(stream_class->event_classes, event_class_exists,
+               &query);
        if (query.found) {
                ret = -1;
                goto end;
@@ -621,6 +666,28 @@ end:
        return ret;
 }
 
+BT_HIDDEN
+int bt_ctf_stream_class_set_trace(struct bt_ctf_stream_class *stream_class,
+               struct bt_ctf_trace *trace)
+{
+       int ret = 0;
+
+       if (!stream_class) {
+               ret = -1;
+               goto end;
+       }
+
+       if (stream_class->trace && trace) {
+               /* Already attached to a trace */
+               ret = -1;
+               goto end;
+       }
+
+       stream_class->trace = trace;
+end:
+       return ret;
+}
+
 static
 void bt_ctf_stream_class_destroy(struct bt_ctf_ref *ref)
 {