X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=libringbuffer%2Ffrontend_types.h;h=0a0488459d8e5fe7fc062a96915acaeaf959a231;hb=23c8854a5fa1120df5cfdfbf08f00e00976f95fa;hp=ad7848c831627cd87a009db5a1c9e29c41a1f841;hpb=5d61a504c6d395914d78f97e82f6fd0fdf0f98a0;p=lttng-ust.git

diff --git a/libringbuffer/frontend_types.h b/libringbuffer/frontend_types.h
index ad7848c8..0a048845 100644
--- a/libringbuffer/frontend_types.h
+++ b/libringbuffer/frontend_types.h
@@ -21,10 +21,10 @@
 #include <urcu/list.h>
 #include <urcu/uatomic.h>
 
-#include "ust/core.h"
+#include "lttng/core.h"
 
-#include <ust/usterr-signal-safe.h>
-#include <ust/ringbuffer-config.h>
+#include <lttng/usterr-signal-safe.h>
+#include <lttng/ringbuffer-config.h>
 #include "backend_types.h"
 #include "shm_internal.h"
 
@@ -44,27 +44,31 @@ 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 */
-} ____cacheline_aligned;
+	size_t priv_data_offset;
+	/*
+	 * Associated backend contains a variable-length array. Needs to
+	 * be last member.
+	 */
+	struct channel_backend backend;		/* Associated backend */
+} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
 
 /* Per-subbuffer commit counters used on the hot path */
 struct commit_counters_hot {
 	union v_atomic cc;		/* Commit counter */
 	union v_atomic seq;		/* Consecutive commits */
-} ____cacheline_aligned;
+} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
 
 /* Per-subbuffer commit counters used only on cold paths */
 struct commit_counters_cold {
 	union v_atomic cc_sb;		/* Incremented _once_ at sb switch */
-} ____cacheline_aligned;
+} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
 
 /* 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 +83,7 @@ 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 +91,7 @@ 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 */
@@ -104,24 +109,24 @@ struct lib_ring_buffer {
 	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 lib_ring_buffer, self);
-} ____cacheline_aligned;
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer, self);
+} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
 
 static inline
 void *channel_get_private(struct channel *chan)
 {
-	return chan->backend.priv;
+	return ((char *) chan) + chan->priv_data_offset;
 }
 
 /*
  * 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),	\