Per-stream ioctl to get the current timestamp

[lttng-ust.git] / liblttng-ust-ctl / ustctl.c

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 7830132b8c41d08c295bc2dc10cee41faf3940da..11fc70446ea5ac015d0d9e613df73c1aef785ad8 100644 (file)
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -1571,6 +1571,21 @@ int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
        return client_cb->stream_id(buf, handle, stream_id);
 }
 
+int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
+               uint64_t *ts)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !ts)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb || !client_cb->current_timestamp)
+               return -ENOSYS;
+       return client_cb->current_timestamp(buf, handle, ts);
+}
+
 /*
  * Returns 0 on success, negative error value on error.
  */