From 2bd61938337659b6afb05dba595324a6f76b5a4c Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Sat, 18 Jul 2015 01:26:22 +0200
Subject: kern/lock: add lock_taken

* kern/lock.h (lock_taken): New macro.
---
 kern/lock.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kern/lock.h b/kern/lock.h
index 2781a48..74cd933 100644
--- a/kern/lock.h
+++ b/kern/lock.h
@@ -202,6 +202,7 @@ extern boolean_t	lock_try_read_to_write(lock_t);
 
 #define	lock_read_done(l)	lock_done(l)
 #define	lock_write_done(l)	lock_done(l)
+#define lock_taken(l)		((l)->want_write || (l)->read_count)
 
 extern void		lock_set_recursive(lock_t);
 extern void		lock_clear_recursive(lock_t);
-- 
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