consumer: introduce channel lock

[lttng-tools.git] / src / common / consumer.h

diff --git a/src/common/consumer.h b/src/common/consumer.h
index eeaf1100243e1f232a1acb47e0aacdeb4487293c..3a0c6c8d8f5e3a737e9ce6da64c3fb4e09c4dd21 100644 (file)
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -168,6 +168,16 @@ struct lttng_consumer_channel {
         * monitor list of the channel.
         */
        unsigned int monitor;
+
+       /*
+        * Channel lock.
+        *
+        * This is nested INSIDE the consumer data lock.
+        * This is nested OUTSIDE the metadata cache lock.
+        * This is nested OUTSIDE stream lock.
+        * This is nested OUTSIDE consumer_relayd_sock_pair lock.
+        */
+       pthread_mutex_t lock;
 };
 
 /*
@@ -247,6 +257,7 @@ struct lttng_consumer_stream {
         *
         * This is nested INSIDE the consumer_data lock.
         * This is nested INSIDE the metadata cache lock.
+        * This is nested INSIDE the channel lock.
         * This is nested OUTSIDE consumer_relayd_sock_pair lock.
         */
        pthread_mutex_t lock;
@@ -573,5 +584,7 @@ int consumer_send_status_channel(int sock,
 void notify_thread_del_channel(struct lttng_consumer_local_data *ctx,
                uint64_t key);
 void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd);
+unsigned long consumer_get_consumed_maxsize(unsigned long consumed_pos,
+               unsigned long produced_pos, uint64_t max_stream_size);
 
 #endif /* LIB_CONSUMER_H */