Introduce pipe for UST metadata cache and stream

Reviewed-by: Julien Desfossez <julien.desfossez@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/src/common/consumer.h b/src/common/consumer.h
index 3a0c6c8d8f5e3a737e9ce6da64c3fb4e09c4dd21..fe396c017a6f4109291d95aa64d50a462c7a3dcb 100644 (file)
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -290,6 +290,16 @@ struct lttng_consumer_stream {
         * acquired in the destroy path.
         */
        unsigned int globally_visible;
+       /*
+        * Pipe to wake up the metadata poll thread when the UST metadata
+        * cache is updated.
+        */
+       int ust_metadata_poll_pipe[2];
+       /*
+        * How much metadata was read from the metadata cache and sent
+        * to the channel.
+        */
+       uint64_t ust_metadata_pushed;
 };
 
 /*