--- /dev/null
+#ifndef BABELTRACE_GRAPH_MESSAGE_STREAM_ACTIVITY_INTERNAL_H
+#define BABELTRACE_GRAPH_MESSAGE_STREAM_ACTIVITY_INTERNAL_H
+
+/*
+ * Copyright 2019 Philippe Proulx <pproulx@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <glib.h>
+#include <babeltrace2/trace-ir/clock-snapshot-internal.h>
+#include <babeltrace2/trace-ir/stream-internal.h>
+#include <babeltrace2/graph/message-const.h>
+#include <babeltrace2/graph/message-stream-activity-const.h>
+
+struct bt_message_stream_activity {
+ struct bt_message parent;
+ struct bt_stream *stream;
+ struct bt_clock_snapshot *default_cs;
+ enum bt_message_stream_activity_clock_snapshot_state default_cs_state;
+};
+
+static inline
+const char *bt_message_stream_activity_clock_snapshot_state_string(
+ enum bt_message_stream_activity_clock_snapshot_state state)
+{
+ switch (state) {
+ case BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_KNOWN:
+ return "BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_KNOWN";
+ case BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_UNKNOWN:
+ return "BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_UNKNOWN";
+ case BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_INFINITE:
+ return "BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_INFINITE";
+ default:
+ return "(unknown)";
+ }
+}
+
+#endif /* BABELTRACE_GRAPH_MESSAGE_STREAM_ACTIVITY_INTERNAL_H */