Use __atomic_signal_fence(__ATOMIC_SEQ_CST) for cmm_barrier() if
configured to use atomic builtins.
Change-Id: Ib168b50f1e97a8da861b92d6882c56db230ebb2c
Co-authored-by: Mathieu Desnoyers <mathieu.desnoy...@efficios.com>
Signed-off-by: Olivier Dion <od...@efficios.com>
---
include/urcu/compiler.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/urcu/compiler.h b/include/urcu/compiler.h
index 2f32b38..3604488 100644
--- a/include/urcu/compiler.h
+++ b/include/urcu/compiler.h
@@ -25,10 +25,16 @@
# include <type_traits> /* for std::remove_cv */
#endif
+#include <urcu/config.h>
+
#define caa_likely(x) __builtin_expect(!!(x), 1)
#define caa_unlikely(x) __builtin_expect(!!(x), 0)
-#define cmm_barrier() __asm__ __volatile__ ("" : : : "memory")
+#ifdef CONFIG_RCU_USE_ATOMIC_BUILTINS
+# define cmm_barrier() __atomic_signal_fence(__ATOMIC_SEQ_CST)
+#else
+# define cmm_barrier() asm volatile ("" : : : "memory")
+#endif
/*
* Instruct the compiler to perform only a single access to a variable
--
2.39.2
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