atomic: Add compare_and_swap()

Signed-off-by: Andrew Opalach <andrew@akon.city>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/al/atomic.h b/include/al/atomic.h
index 7d070ab..594413c 100644
--- a/include/al/atomic.h
+++ b/include/al/atomic.h
@@ -18,6 +18,7 @@
 #define al_atomic_store(T) _al_atomic_store_##T
 #define al_atomic_add(T) _al_atomic_add_##T
 #define al_atomic_sub(T) _al_atomic_sub_##T
+#define al_atomic_compare_and_swap(T) _al_atomic_compare_and_swap_##T
 
 // Special case for pointers.
 #define _al_atomic_load_void(p, order) c89atomic_load_explicit_ptr((volatile void **)p, order)
@@ -44,6 +45,10 @@ typedef f32 c89atomic_f32;
     static inline T al_atomic_sub(T)(atomic(T) *a, T value, int order) \
     { \
         return c89atomic_fetch_sub_explicit_##S(a, value, order); \
+    } \
+    static inline T al_atomic_compare_and_swap(T)(atomic(T) *a, T expected, T desired) \
+    { \
+        return c89atomic_compare_and_swap_##S(a, expected, desired); \
     }
 
 #if defined C89ATOMIC_64BIT