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authorMaarten Lankhorst <maarten.lankhorst@ubuntu.com>2015-02-26 11:54:02 +0100
committerMaarten Lankhorst <dev@mblankhorst.nl>2015-03-13 20:21:57 +0100
commit7caa442e761ab5e48698c937aea9ce18f4522ecb (patch)
tree83b7a81c99bb50dcbfbd0e1aadcaf548a5f7f8a1
parentcd4685498b7926cf3fb39c6d0d25b2bc76c29f68 (diff)
Use __sync_add_and_fetch instead of __sync_fetch_and_add for atomic_dec_and_test
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@ubuntu.com> Acked-By: Emil Velikov <emil.l.velikov@gmail.com>
-rw-r--r--xf86atomic.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/xf86atomic.h b/xf86atomic.h
index 17fb088d..194554ce 100644
--- a/xf86atomic.h
+++ b/xf86atomic.h
@@ -50,7 +50,7 @@ typedef struct {
# define atomic_set(x, val) ((x)->atomic = (val))
# define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1))
# define atomic_inc_return(x) (__sync_add_and_fetch (&(x)->atomic, 1))
-# define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1)
+# define atomic_dec_and_test(x) (__sync_add_and_fetch (&(x)->atomic, -1) == 0)
# define atomic_add(x, v) ((void) __sync_add_and_fetch(&(x)->atomic, (v)))
# define atomic_dec(x, v) ((void) __sync_sub_and_fetch(&(x)->atomic, (v)))
# define atomic_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (&(x)->atomic, oldv, newv)