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[ceph.git] / ceph / src / boost / boost / atomic / detail / ops_msvc_common.hpp

diff --git a/ceph/src/boost/boost/atomic/detail/ops_msvc_common.hpp b/ceph/src/boost/boost/atomic/detail/ops_msvc_common.hpp
index 53628f360047db0fc5c3818cf77cdc6e86e9702c..8c5120760b372639aa2c96f1d5046281c9140171 100644 (file)
--- a/ceph/src/boost/boost/atomic/detail/ops_msvc_common.hpp
+++ b/ceph/src/boost/boost/atomic/detail/ops_msvc_common.hpp
@@ -5,7 +5,7 @@
  *
  * Copyright (c) 2009 Helge Bahmann
  * Copyright (c) 2012 Tim Blechmann
- * Copyright (c) 2014 Andrey Semashev
+ * Copyright (c) 2014, 2019 Andrey Semashev
  */
 /*!
  * \file   atomic/detail/ops_msvc_common.hpp
@@ -25,6 +25,8 @@
 // Define compiler barriers
 #if defined(__INTEL_COMPILER)
 #define BOOST_ATOMIC_DETAIL_COMPILER_BARRIER() __memory_barrier()
+#elif defined(__clang__)
+#define BOOST_ATOMIC_DETAIL_COMPILER_BARRIER() __atomic_signal_fence(__ATOMIC_SEQ_CST)
 #elif defined(_MSC_VER) && !defined(_WIN32_WCE)
 extern "C" void _ReadWriteBarrier(void);
 #pragma intrinsic(_ReadWriteBarrier)