X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=libtracing%2Frelay.h;h=54bd2b9e72b81a3da057939ada48fa0dd6ededc9;hb=9c67dc50afb2eaa1c3966ee73fac3ce55935556c;hp=47ebfd13fd9e99cc870bd0fa7302dedc92d12f5d;hpb=c1dea0b3d1312d0e3747da93eb949145c487eeba;p=ust.git

diff --git a/libtracing/relay.h b/libtracing/relay.h
index 47ebfd1..54bd2b9 100644
--- a/libtracing/relay.h
+++ b/libtracing/relay.h
@@ -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 */