Add support for gcc <= 4.6

Sebastiano Merlino · Sebastiano Merlino · commit 195d2daedd9c · 2016-01-07T02:27:03.000+01:00
diff --git a/src/httpserver/details/http_response_ptr.hpp b/src/httpserver/details/http_response_ptr.hpp
@@ -35,14 +35,22 @@
 #define atomic_decrement(object) \
     __c11_atomic_sub_fetch(object, 1, __ATOMIC_ACQ_REL)
 
-#else
+#elif defined(__GNUC_ATOMICS)
 
 #define atomic_increment(object) \
     __atomic_add_fetch(object, 1, __ATOMIC_RELAXED)
 
 #define atomic_decrement(object) \
     __atomic_sub_fetch(object, 1, __ATOMIC_ACQ_REL)
 
+#else
+
+#define atomic_increment(object) \
+    __sync_add_and_fetch(object, 1)
+
+#define atomic_decrement(object) \
+    __sync_sub_and_fetch(object, 1)
+
 #endif
 
 namespace httpserver
