X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=libringbuffer%2Ffrontend_types.h;h=84593260c4f7b7ef941708d9fd0347881165efe1;hb=b5a3dfa5923801ddeea22ce70758d1e61200eac2;hp=974f782e0dc86b3ed3903ec861ede6754504fbd9;hpb=1d4981969313da002983ca979bd85c95493f7316;p=lttng-ust.git

diff --git a/libringbuffer/frontend_types.h b/libringbuffer/frontend_types.h
index 974f782e..84593260 100644
--- a/libringbuffer/frontend_types.h
+++ b/libringbuffer/frontend_types.h
@@ -44,12 +44,15 @@ struct channel {
 						 * subbuffer index.
 						 */
 
-	struct channel_backend backend;		/* Associated backend */
-
 	unsigned long switch_timer_interval;	/* Buffer flush (jiffies) */
 	unsigned long read_timer_interval;	/* Reader wakeup (jiffies) */
 	//wait_queue_head_t read_wait;		/* reader wait queue */
 	int finalized;				/* Has channel been finalized */
+	/*
+	 * Associated backend contains a variable-length array. Needs to
+	 * be last member.
+	 */
+	struct channel_backend backend;		/* Associated backend */
 } ____cacheline_aligned;
 
 /* Per-subbuffer commit counters used on the hot path */
@@ -64,7 +67,7 @@ struct commit_counters_cold {
 } ____cacheline_aligned;
 
 /* ring buffer state */
-struct lib_ring_buffer {
+struct lttng_ust_lib_ring_buffer {
 	/* First 32 bytes cache-hot cacheline */
 	union v_atomic offset;		/* Current offset in the buffer */
 	DECLARE_SHMP(struct commit_counters_hot, commit_hot);
@@ -79,7 +82,7 @@ struct lib_ring_buffer {
 					 * Last timestamp written in the buffer.
 					 */
 
-	struct lib_ring_buffer_backend backend;	/* Associated backend */
+	struct lttng_ust_lib_ring_buffer_backend backend;	/* Associated backend */
 
 	DECLARE_SHMP(struct commit_counters_cold, commit_cold);
 					/* Commit count per sub-buffer */
@@ -87,6 +90,7 @@ struct lib_ring_buffer {
 					 * Active readers count
 					 * standard atomic access (shared)
 					 */
+	long active_shadow_readers;
 					/* Dropped records */
 	union v_atomic records_lost_full;	/* Buffer full */
 	union v_atomic records_lost_wrap;	/* Nested wrap-around */
@@ -103,6 +107,8 @@ struct lib_ring_buffer {
 	int get_subbuf:1;		/* Sub-buffer being held by reader */
 	int switch_timer_enabled:1;	/* Protected by ring_buffer_nohz_lock */
 	int read_timer_enabled:1;	/* Protected by ring_buffer_nohz_lock */
+	/* shmp pointer to self */
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer, self);
 } ____cacheline_aligned;
 
 static inline
@@ -113,13 +119,13 @@ void *channel_get_private(struct channel *chan)
 
 /*
  * Issue warnings and disable channels upon internal error.
- * Can receive struct lib_ring_buffer or struct lib_ring_buffer_backend
+ * Can receive struct lttng_ust_lib_ring_buffer or struct lttng_ust_lib_ring_buffer_backend
  * parameters.
  */
 #define CHAN_WARN_ON(c, cond)						\
 	({								\
 		struct channel *__chan;					\
-		int _____ret = unlikely(cond);				\
+		int _____ret = caa_unlikely(cond);				\
 		if (_____ret) {						\
 			if (__same_type(*(c), struct channel_backend))	\
 				__chan = caa_container_of((void *) (c),	\