Clean-up: consumerd: use a specific status code for get_next_subbuffer

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

diff --git a/src/common/consumer/consumer.h b/src/common/consumer/consumer.h
index b45f88b756b2032dbf90daa74e91f31ed9ffc940..5fb812c08edb377f213f26b91e53dc74a2364d9a 100644 (file)
--- a/src/common/consumer/consumer.h
+++ b/src/common/consumer/consumer.h
@@ -96,7 +96,7 @@ enum sync_metadata_status {
        SYNC_METADATA_STATUS_ERROR,
 };
 
-extern struct lttng_consumer_global_data consumer_data;
+extern struct lttng_consumer_global_data the_consumer_data;
 
 struct stream_list {
        struct cds_list_head head;
@@ -160,7 +160,7 @@ struct lttng_consumer_channel {
 
        /* For UST */
        uid_t ust_app_uid;      /* Application UID. */
-       struct ustctl_consumer_channel *uchan;
+       struct lttng_ust_ctl_consumer_channel *uchan;
        unsigned char uuid[LTTNG_UUID_STR_LEN];
        /*
         * Temporary stream list used to store the streams once created and waiting
@@ -299,6 +299,12 @@ struct stream_subbuffer {
        } info;
 };
 
+enum get_next_subbuffer_status {
+       GET_NEXT_SUBBUFFER_STATUS_OK,
+       GET_NEXT_SUBBUFFER_STATUS_NO_DATA,
+       GET_NEXT_SUBBUFFER_STATUS_ERROR,
+};
+
 /*
  * Perform any operation required to acknowledge
  * the wake-up of a consumer stream (e.g. consume a byte on a wake-up pipe).
@@ -321,8 +327,8 @@ typedef int (*on_sleep_cb)(struct lttng_consumer_stream *,
  *
  * Stream and channel locks are acquired during this call.
  */
-typedef int (*get_next_subbuffer_cb)(struct lttng_consumer_stream *,
-               struct stream_subbuffer *);
+typedef enum get_next_subbuffer_status (*get_next_subbuffer_cb)(
+               struct lttng_consumer_stream *, struct stream_subbuffer *);
 
 /*
  * Populate the stream_subbuffer's info member. The info to populate
@@ -540,7 +546,7 @@ struct lttng_consumer_stream {
        /* Stream name. Format is: <channel_name>_<cpu_number> */
        char name[LTTNG_SYMBOL_NAME_LEN];
        /* Internal state of libustctl. */
-       struct ustctl_consumer_stream *ustream;
+       struct lttng_ust_ctl_consumer_stream *ustream;
        struct cds_list_head send_node;
        /* On-disk circular buffer */
        uint64_t tracefile_size_current;
@@ -1052,5 +1058,6 @@ enum lttcomm_return_code lttng_consumer_init_command(
 int lttng_consumer_clear_channel(struct lttng_consumer_channel *channel);
 enum lttcomm_return_code lttng_consumer_open_channel_packets(
                struct lttng_consumer_channel *channel);
+int consumer_metadata_wakeup_pipe(const struct lttng_consumer_channel *channel);
 
 #endif /* LIB_CONSUMER_H */