Fix: symbol aliases with TLS compat

[urcu.git] / src / urcu-utils.h

diff --git a/src/urcu-utils.h b/src/urcu-utils.h
index 1d91bc92be24f7906547db2bc561150b45f17edd..eab6212dd61539651aaded7ad747874a6e9d1d92 100644 (file)
--- a/src/urcu-utils.h
+++ b/src/urcu-utils.h
@@ -26,4 +26,25 @@
 #define urcu_stringify(a) _urcu_stringify(a)
 #define _urcu_stringify(a) #a
 
+/* There is no concept of symbol aliases on MacOS */
+#ifdef __APPLE__
+#define URCU_ATTR_ALIAS(x)
+#else
+#define URCU_ATTR_ALIAS(x) __attribute__((alias(x)))
+#endif
+
+#ifdef CONFIG_RCU_TLS
+#define DEFINE_URCU_TLS_ALIAS_1(type, name, alias)             \
+       URCU_ATTR_ALIAS(#name)                                  \
+       extern type alias
+
+#else
+#define DEFINE_URCU_TLS_ALIAS_1(type, name, alias)             \
+       URCU_ATTR_ALIAS("*__tls_access_" #name)                 \
+       type *__tls_access_ ## alias()
+#endif
+
+#define DEFINE_URCU_TLS_ALIAS(type, name, alias)               \
+       DEFINE_URCU_TLS_ALIAS_1(type, name, alias)
+
 #endif /* _URCU_UTILS_H */