seq: Attribute wakeups to seq_wait()'s caller, not to seq_wait() itself.

The poll_loop code has a feature that, when turned on manually or
automatically (due to high CPU use), logs the source file and line number
of the code that caused a thread to wake up from poll().  Until now, when
a function calls seq_wait(), the source file and line number logged was
the code inside seq_wait().  seq_wait() has many callers, so that
information is not as useful as it could be.  This commit changes the
source file and line number used to be that of seq_wait()'s caller.

I found this useful for debugging.

Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/lib/seq.h b/lib/seq.h
index c764809e5..38c0e5275 100644
--- a/lib/seq.h
+++ b/lib/seq.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013 Nicira, Inc.
+ * Copyright (c) 2013, 2014 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -111,6 +111,7 @@
  */
 
 #include <stdint.h>
+#include "util.h"
 
 /* For implementation of an object with a sequence number attached. */
 struct seq *seq_create(void);
@@ -119,7 +120,9 @@ void seq_change(struct seq *);
 
 /* For observers. */
 uint64_t seq_read(const struct seq *);
-void seq_wait(const struct seq *, uint64_t value);
+
+void seq_wait_at(const struct seq *, uint64_t value, const char *where);
+#define seq_wait(seq, value) seq_wait_at(seq, value, SOURCE_LOCATOR)
 
 /* For poll_block() internal use. */
 void seq_woke(void);