X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=libringbuffer%2Ffrontend_types.h;h=120e1f4bbbe06b94cea844fb5b654b60c81e04a6;hb=4cfec15c93af7e0cfe3ce769ee90486bb8ab7c37;hp=28179dfc58b8ebc31c75b65115127d9fa73e79a3;hpb=1dbfff0c0126804b07e9c11ba2307f65a95a650b;p=lttng-ust.git

diff --git a/libringbuffer/frontend_types.h b/libringbuffer/frontend_types.h
index 28179dfc..120e1f4b 100644
--- a/libringbuffer/frontend_types.h
+++ b/libringbuffer/frontend_types.h
@@ -26,7 +26,7 @@
 #include <ust/usterr-signal-safe.h>
 #include <ust/ringbuffer-config.h>
 #include "backend_types.h"
-#include "shm.h"
+#include "shm_internal.h"
 
 /*
  * A switch is done during tracing or as a final flush after tracing (so it
@@ -44,13 +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 */
-	DECLARE_SHMP(struct shm_header, shm_header);
+	/*
+	 * 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 */
@@ -65,7 +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);
@@ -80,7 +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 */
@@ -88,6 +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 */
@@ -104,6 +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
@@ -114,7 +119,7 @@ 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)						\