X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fconsumer.h;h=53b6151822ba36102b6b6df5a53878ac35b714a7;hb=ab1027f48fa7e2dd29b3c85548ec42f26d06be25;hp=9981856feeca8734a428951418c34c7e2f380e96;hpb=536322299f7fc9ef136a0d7e50ba8e1b5d7a754b;p=lttng-tools.git

diff --git a/src/common/consumer.h b/src/common/consumer.h
index 9981856fe..53b615182 100644
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -141,7 +141,12 @@ struct lttng_consumer_stream {
 	uint64_t relayd_stream_id;
 	/* Next sequence number to use for trace packet */
 	uint64_t next_net_seq_num;
-	/* Lock to use the stream FDs since they are used between threads. */
+	/*
+	 * Lock to use the stream FDs since they are used between threads. Using
+	 * this lock with network streaming, when using the control mutex of a
+	 * consumer_relayd_sock_pair, make sure to acquire this lock BEFORE locking
+	 * it and releasing it AFTER the control mutex unlock.
+	 */
 	pthread_mutex_t lock;
 	/* Tracing session id */
 	uint64_t session_id;
@@ -414,5 +419,6 @@ int consumer_add_relayd_socket(int net_seq_idx, int sock_type,
 		struct pollfd *consumer_sockpoll, struct lttcomm_sock *relayd_sock);
 void consumer_flag_relayd_for_destroy(
 		struct consumer_relayd_sock_pair *relayd);
+int consumer_data_available(uint64_t id);
 
 #endif /* LIB_CONSUMER_H */