Make API CTF-agnostic

[babeltrace.git] / lib / ctf-ir / event-header-field.c

diff --git a/lib/ctf-ir/event-header-field.c b/lib/ctf-ir/event-header-field.c
index 40c87497158ced6e76d21568749aafbd78d2e591..dd2b2fffd3a385511c88814c518b65f7e8cb7b93 100644 (file)
--- a/lib/ctf-ir/event-header-field.c
+++ b/lib/ctf-ir/event-header-field.c
@@ -25,6 +25,7 @@
 
 #include <babeltrace/assert-pre-internal.h>
 #include <babeltrace/ctf-ir/event-header-field.h>
+#include <babeltrace/ctf-ir/stream-class-internal.h>
 #include <babeltrace/ctf-ir/fields-internal.h>
 #include <babeltrace/ctf-ir/field-wrapper-internal.h>
 #include <glib.h>
@@ -35,8 +36,6 @@ struct bt_field *bt_event_header_field_borrow_field(
        struct bt_field_wrapper *field_wrapper = (void *) header_field;
 
        BT_ASSERT_PRE_NON_NULL(field_wrapper, "Event header field");
-       BT_ASSERT_PRE_NON_NULL(field_wrapper->field,
-               "Event header field's field object");
        return (void *) field_wrapper->field;
 }
 
@@ -55,3 +54,37 @@ void bt_event_header_field_release(struct bt_event_header_field *header_field)
         */
        bt_field_wrapper_destroy(field_wrapper);
 }
+
+struct bt_event_header_field *bt_event_header_field_create(
+               struct bt_stream_class *stream_class)
+{
+       struct bt_field_wrapper *field_wrapper;
+
+       BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
+       BT_ASSERT_PRE(bt_stream_class_borrow_trace_inline(stream_class),
+               "Stream class is not part of a trace: %!+S", stream_class);
+       BT_ASSERT_PRE(stream_class->event_header_ft,
+               "Stream class has no event header field type: %!+S",
+               stream_class);
+       field_wrapper = bt_field_wrapper_create(
+               &stream_class->event_header_field_pool,
+               (void *) stream_class->event_header_ft);
+       if (!field_wrapper) {
+               BT_LIB_LOGE("Cannot allocate one event header field from stream class: "
+                       "%![sc-]+S", stream_class);
+               goto error;
+       }
+
+       BT_ASSERT(field_wrapper->field);
+       bt_stream_class_freeze(stream_class);
+       goto end;
+
+error:
+       if (field_wrapper) {
+               bt_field_wrapper_destroy(field_wrapper);
+               field_wrapper = NULL;
+       }
+
+end:
+       return (void *) field_wrapper;
+}