Fixed package groups

[platform/upstream/libdrm.git] / xf86atomic.h

diff --git a/xf86atomic.h b/xf86atomic.h
index 854187a..bc482c9 100644 (file)
--- a/xf86atomic.h
+++ b/xf86atomic.h
@@ -86,8 +86,8 @@ typedef struct { uint_t atomic; } atomic_t;
 # define atomic_set(x, val) ((x)->atomic = (uint_t)(val))
 # define atomic_inc(x) (atomic_inc_uint (&(x)->atomic))
 # define atomic_dec_and_test(x) (atomic_dec_uint_nv(&(x)->atomic) == 1)
-# define atomic_add(x, v) (atomic_add_uint(&(x)->atomic, (v)))
-# define atomic_dec(x, v) (atomic_dec_uint(&(x)->atomic, (v)))
+# define atomic_add(x, v) (atomic_add_int(&(x)->atomic, (v)))
+# define atomic_dec(x, v) (atomic_add_int(&(x)->atomic, -(v)))
 # define atomic_cmpxchg(x, oldv, newv) atomic_cas_uint (&(x)->atomic, oldv, newv)
 
 #endif
@@ -96,4 +96,13 @@ typedef struct { uint_t atomic; } atomic_t;
 #error libdrm requires atomic operations, please define them for your CPU/compiler.
 #endif
 
+static inline int atomic_add_unless(atomic_t *v, int add, int unless)
+{
+       int c, old;
+       c = atomic_read(v);
+       while (c != unless && (old = atomic_cmpxchg(v, c, c + add)) != c)
+               c = old;
+       return c == unless;
+}
+
 #endif