Add stream_event_context accessors

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

diff --git a/formats/ctf/ir/stream.c b/formats/ctf/ir/stream.c
index b4eb294bf1bfe4ac0990110bf902e0cadb8db814..ce909bf4535696df0af262272d16159048519c9e 100644 (file)
--- a/formats/ctf/ir/stream.c
+++ b/formats/ctf/ir/stream.c
@@ -94,7 +94,17 @@ struct bt_ctf_stream *bt_ctf_stream_create(
        bt_ctf_stream_class_get(stream_class);
        bt_ctf_stream_class_freeze(stream_class);
        stream->events = g_ptr_array_new_with_free_func(
-               (GDestroyNotify)bt_ctf_event_put);
+               (GDestroyNotify) bt_ctf_event_put);
+       if (!stream->events) {
+               goto error_destroy;
+       }
+       if (stream_class->event_context_type) {
+               stream->event_contexts = g_ptr_array_new_with_free_func(
+                       (GDestroyNotify) bt_ctf_field_put);
+               if (!stream->event_contexts) {
+                       goto error_destroy;
+               }
+       }
 end:
        return stream;
 error_destroy:
@@ -278,6 +288,21 @@ int bt_ctf_stream_append_event(struct bt_ctf_stream *stream,
                goto end;
        }
 
+       /* Sample the current stream event context by copying it */
+       if (stream->event_context) {
+               /* Make sure the event context's payload is set */
+               ret = bt_ctf_field_validate(stream->event_context);
+               if (ret) {
+                       goto end;
+               }
+
+               event_context_copy = bt_ctf_field_copy(stream->event_context);
+               if (!event_context_copy) {
+                       ret = -1;
+                       goto end;
+               }
+       }
+
        timestamp = bt_ctf_clock_get_time(stream->stream_class->clock);
        ret = bt_ctf_event_set_timestamp(event, timestamp);
        if (ret) {
@@ -285,7 +310,11 @@ int bt_ctf_stream_append_event(struct bt_ctf_stream *stream,
        }
 
        bt_ctf_event_get(event);
+       /* Save the new event along with its associated stream event context */
        g_ptr_array_add(stream->events, event);
+       if (event_context_copy) {
+               g_ptr_array_add(stream->event_contexts, event_context_copy);
+       }
 end:
        return ret;
 }
@@ -332,6 +361,50 @@ end:
        return ret;
 }
 
+struct bt_ctf_field *bt_ctf_stream_get_event_context(
+               struct bt_ctf_stream *stream)
+{
+       struct bt_ctf_field *event_context = NULL;
+
+       if (!stream) {
+               goto end;
+       }
+
+       event_context = stream->event_context;
+       if (event_context) {
+               bt_ctf_field_get(event_context);
+       }
+end:
+       return event_context;
+}
+
+int bt_ctf_stream_set_event_context(struct bt_ctf_stream *stream,
+               struct bt_ctf_field *field)
+{
+       int ret = 0;
+       struct bt_ctf_field_type *field_type = NULL;
+
+       if (!stream || !field) {
+               ret = -1;
+               goto end;
+       }
+
+       field_type = bt_ctf_field_get_type(field);
+       if (field_type != stream->stream_class->event_context_type) {
+               ret = -1;
+               goto end;
+       }
+
+       bt_ctf_field_get(field);
+       bt_ctf_field_put(stream->event_context);
+       stream->event_context = field;
+end:
+       if (field_type) {
+               bt_ctf_field_type_put(field_type);
+       }
+       return ret;
+}
+
 int bt_ctf_stream_flush(struct bt_ctf_stream *stream)
 {
        int ret = 0;
@@ -447,6 +520,16 @@ int bt_ctf_stream_flush(struct bt_ctf_stream *stream)
                        goto end;
                }
 
+               /* Write stream event context */
+               if (stream->event_contexts) {
+                       ret = bt_ctf_field_serialize(
+                               g_ptr_array_index(stream->event_contexts, i),
+                               &stream->pos);
+                       if (ret) {
+                               goto end;
+                       }
+               }
+
                /* Write event content */
                ret = bt_ctf_event_serialize(event, &stream->pos);
                if (ret) {
@@ -480,6 +563,9 @@ int bt_ctf_stream_flush(struct bt_ctf_stream *stream)
        }
 
        g_ptr_array_set_size(stream->events, 0);
+       if (stream->event_contexts) {
+               g_ptr_array_set_size(stream->event_contexts, 0);
+       }
        stream->flushed_packet_count++;
 end:
        bt_ctf_field_put(integer);
@@ -525,9 +611,15 @@ void bt_ctf_stream_destroy(struct bt_ctf_ref *ref)
        if (stream->events) {
                g_ptr_array_free(stream->events, TRUE);
        }
+       if (stream->event_contexts) {
+               g_ptr_array_free(stream->event_contexts, TRUE);
+       }
        if (stream->packet_context) {
                bt_ctf_field_put(stream->packet_context);
        }
+       if (stream->event_context) {
+               bt_ctf_field_put(stream->event_context);
+       }
        g_free(stream);
 }