Generate and export the sequence number

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

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 10fb9c4921f36ba4b4955fe90b892aeb9ce08e9b..fcb6f0d55c398f2cc534d7f8aa27c5f4e21b5657 100644 (file)
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -1708,6 +1708,23 @@ int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
        return client_cb->current_timestamp(buf, handle, ts);
 }
 
+int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream,
+               uint64_t *seq)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf;
+       struct lttng_ust_shm_handle *handle;
+
+       if (!stream || !seq)
+               return -EINVAL;
+       buf = stream->buf;
+       handle = stream->chan->chan->handle;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb || !client_cb->sequence_number)
+               return -ENOSYS;
+       return client_cb->sequence_number(buf, handle, seq);
+}
+
 #if defined(__x86_64__) || defined(__i386__)
 
 int ustctl_has_perf_counters(void)