Add CTF-IR visitor interface

[babeltrace.git] / formats / ctf / ir / trace.c

diff --git a/formats/ctf/ir/trace.c b/formats/ctf/ir/trace.c
index 9cce8b6f95c91eaa49af9384075416bf0d80609f..2cbfdb4e0e878ef1938fb3729a081d49918ba55e 100644 (file)
--- a/formats/ctf/ir/trace.c
+++ b/formats/ctf/ir/trace.c
@@ -37,7 +37,9 @@
 #include <babeltrace/ctf-ir/field-types-internal.h>
 #include <babeltrace/ctf-ir/attributes-internal.h>
 #include <babeltrace/ctf-ir/validation-internal.h>
+#include <babeltrace/ctf-ir/visitor-internal.h>
 #include <babeltrace/ctf-ir/utils.h>
+#include <babeltrace/plugin/notification/schema.h>
 #include <babeltrace/compiler.h>
 #include <babeltrace/values.h>
 #include <babeltrace/ref.h>
@@ -46,6 +48,11 @@
 #define DEFAULT_IDENTIFIER_SIZE 128
 #define DEFAULT_METADATA_STRING_SIZE 4096
 
+struct notification_handler {
+       bt_ctf_notification_cb func;
+       void *data;
+};
+
 static
 void bt_ctf_trace_destroy(struct bt_object *obj);
 static
@@ -1027,9 +1034,103 @@ end:
        return ret;
 }
 
+static
+int get_stream_class_count(void *element)
+{
+       return bt_ctf_trace_get_stream_class_count(
+                       (struct bt_ctf_trace *) element);
+}
+
+static
+void *get_stream_class(void *element, int i)
+{
+       return bt_ctf_trace_get_stream_class(
+                       (struct bt_ctf_trace *) element, i);
+}
+
+static
+int visit_stream_class(void *element, bt_ctf_ir_visitor visitor,void *data)
+{
+       return bt_ctf_stream_class_visit(element, visitor, data);
+}
+
+int bt_ctf_trace_visit(struct bt_ctf_trace *trace,
+               bt_ctf_ir_visitor visitor, void *data)
+{
+       int ret;
+       struct bt_ctf_ir_element element =
+                       { .element = trace, .type = BT_CTF_IR_TYPE_TRACE };
+
+       if (!trace || !visitor) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = visitor_helper(&element, get_stream_class_count,
+                       get_stream_class, visit_stream_class, visitor, data);
+end:
+       return ret;
+}
+
+static
+int ir_visitor(struct bt_ctf_ir_element *element, void *data)
+{
+       int ret = 0;
+
+       switch (element->type) {
+       case BT_CTF_IR_TYPE_TRACE:
+       {
+               break;
+       }
+       case BT_CTF_IR_TYPE_STREAM_CLASS:
+       {
+               break;
+       }
+       case BT_CTF_IR_TYPE_EVENT_CLASS:
+       {
+               break;
+       }
+       default:
+               assert(0);
+               ret = -1;
+               goto end;
+       }
+end:
+       return ret;
+}
+
+int bt_ctf_trace_add_notification_handler_cb(struct bt_ctf_trace *trace,
+               bt_ctf_notification_cb handler, void *handler_data)
+{
+       int ret = 0;
+       struct notification_handler *handler_wrapper =
+                       g_new0(struct notification_handler, 1);
+
+       if (!trace || !handler || !handler_wrapper) {
+               ret = -1;
+               goto error;
+       }
+
+       handler_wrapper->func = handler;
+       handler_wrapper->data = handler_data;
+
+       /* Emit notifications describing the current schema. */
+       ret = bt_ctf_trace_visit(trace, ir_visitor, handler_wrapper);
+       if (ret) {
+               goto error;
+       }
+
+       g_ptr_array_add(trace->notification_handlers, handler_wrapper);
+       return ret;
+error:
+       g_free(handler_wrapper);
+       return ret;
+}
+
 BT_HIDDEN
 struct bt_ctf_field_type *get_field_type(enum field_type_alias alias)
 {
+       int ret;
        unsigned int alignment, size;
        struct bt_ctf_field_type *field_type = NULL;
 
@@ -1040,7 +1141,10 @@ struct bt_ctf_field_type *get_field_type(enum field_type_alias alias)
        alignment = field_type_aliases_alignments[alias];
        size = field_type_aliases_sizes[alias];
        field_type = bt_ctf_field_type_integer_create(size);
-       bt_ctf_field_type_set_alignment(field_type, alignment);
+       ret = bt_ctf_field_type_set_alignment(field_type, alignment);
+       if (ret) {
+               BT_PUT(field_type);
+       }
 end:
        return field_type;
 }