X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=lib%2Fringbuffer%2Ffrontend.h;h=ba96d9a6a215e09f4975e56e45500629dab48e1e;hb=a2b0231a9ae996cc69e48d75c338ad7d081a0f85;hp=6ff154528dd6e2b0d2c39e388a64193c0da7b135;hpb=64af2437213d40fdb1f386ffcad2c83ed5c11185;p=lttng-modules.git

diff --git a/lib/ringbuffer/frontend.h b/lib/ringbuffer/frontend.h
index 6ff15452..ba96d9a6 100644
--- a/lib/ringbuffer/frontend.h
+++ b/lib/ringbuffer/frontend.h
@@ -51,6 +51,9 @@
 /* Internal helpers */
 #include <wrapper/ringbuffer/frontend_internal.h>
 
+/* Max ring buffer nesting count, see lib_ring_buffer_get_cpu(). */
+#define RING_BUFFER_MAX_NESTING 4
+
 /* Buffer creation/removal and setup operations */
 
 /*
@@ -106,6 +109,10 @@ extern void lib_ring_buffer_release_read(struct lib_ring_buffer *buf);
 extern int lib_ring_buffer_snapshot(struct lib_ring_buffer *buf,
 				    unsigned long *consumed,
 				    unsigned long *produced);
+extern int lib_ring_buffer_snapshot_sample_positions(
+				    struct lib_ring_buffer *buf,
+				    unsigned long *consumed,
+				    unsigned long *produced);
 extern void lib_ring_buffer_move_consumer(struct lib_ring_buffer *buf,
 					  unsigned long consumed_new);
 
@@ -164,7 +171,7 @@ static inline
 int lib_ring_buffer_is_finalized(const struct lib_ring_buffer_config *config,
 				 struct lib_ring_buffer *buf)
 {
-	int finalized = ACCESS_ONCE(buf->finalized);
+	int finalized = READ_ONCE(buf->finalized);
 	/*
 	 * Read finalized before counters.
 	 */