X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;ds=sidebyside;f=libtracing%2Frelay.h;h=80f0b6bf69ba383cb3a1505745a4a90286d152e8;hb=a584bc4edb73e3f4c0023c42f2fdbc816fb6eab0;hp=47ebfd13fd9e99cc870bd0fa7302dedc92d12f5d;hpb=bb07823d7dc174f7bd96d30843acfac7424dd0d2;p=lttng-ust.git

diff --git a/libtracing/relay.h b/libtracing/relay.h
index 47ebfd13..80f0b6bf 100644
--- a/libtracing/relay.h
+++ b/libtracing/relay.h
@@ -143,7 +143,7 @@ struct rchan_callbacks {
 	 *
 	 * The callback should return 0 if successful, negative if not.
 	 */
-	int (*remove_buf_file)(struct rchan_buf *buf);
+//ust//	int (*remove_buf_file)(struct rchan_buf *buf);
 };
 
 extern struct buf_page *ltt_relay_find_prev_page(struct rchan_buf *buf,
@@ -314,5 +314,42 @@ extern void ltt_relay_close(struct rchan *chan);
  */
 extern const struct file_operations ltt_relay_file_operations;
 
+
+/* LTTng lockless logging buffer info */
+struct ltt_channel_buf_struct {
+	/* First 32 bytes cache-hot cacheline */
+	local_t offset;			/* Current offset in the buffer */
+	local_t *commit_count;		/* Commit count per sub-buffer */
+	atomic_long_t consumed;		/*
+					 * Current offset in the buffer
+					 * standard atomic access (shared)
+					 */
+	unsigned long last_tsc;		/*
+					 * Last timestamp written in the buffer.
+					 */
+	/* End of first 32 bytes cacheline */
+	atomic_long_t active_readers;	/*
+					 * Active readers count
+					 * standard atomic access (shared)
+					 */
+	local_t events_lost;
+	local_t corrupted_subbuffers;
+	spinlock_t full_lock;		/*
+					 * buffer full condition spinlock, only
+					 * for userspace tracing blocking mode
+					 * synchronization with reader.
+					 */
+//ust//	wait_queue_head_t write_wait;	/*
+//ust//					 * Wait queue for blocking user space
+//ust//					 * writers
+//ust//					 */
+	atomic_t wakeup_readers;	/* Boolean : wakeup readers waiting ? */
+} ____cacheline_aligned;
+
+int ltt_do_get_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, long *pconsumed_old);
+
+int ltt_do_put_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, u32 uconsumed_old);
+
+
 #endif /* _LINUX_LTT_RELAY_H */