New upstream version 8.1.0

thirdparty/source/boost_1_61_0/boost/atomic/fences.hpp

@@ -0,0 +1,67 @@
+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2011 Helge Bahmann
+ * Copyright (c) 2013 Tim Blechmann
+ * Copyright (c) 2014 Andrey Semashev
+ */
+/*!
+ * \file   atomic/fences.hpp
+ *
+ * This header contains definition of \c atomic_thread_fence and \c atomic_signal_fence functions.
+ */
+
+#ifndef BOOST_ATOMIC_FENCES_HPP_INCLUDED_
+#define BOOST_ATOMIC_FENCES_HPP_INCLUDED_
+
+#include <boost/memory_order.hpp>
+#include <boost/atomic/capabilities.hpp>
+#include <boost/atomic/detail/operations.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+/*
+ * IMPLEMENTATION NOTE: All interface functions MUST be declared with BOOST_FORCEINLINE,
+ *                      see comment for convert_memory_order_to_gcc in ops_gcc_atomic.hpp.
+ */
+
+namespace boost {
+
+namespace atomics {
+
+#if BOOST_ATOMIC_THREAD_FENCE > 0
+BOOST_FORCEINLINE void atomic_thread_fence(memory_order order) BOOST_NOEXCEPT
+{
+    detail::thread_fence(order);
+}
+#else
+BOOST_FORCEINLINE void atomic_thread_fence(memory_order) BOOST_NOEXCEPT
+{
+    detail::lockpool::thread_fence();
+}
+#endif
+
+#if BOOST_ATOMIC_SIGNAL_FENCE > 0
+BOOST_FORCEINLINE void atomic_signal_fence(memory_order order) BOOST_NOEXCEPT
+{
+    detail::signal_fence(order);
+}
+#else
+BOOST_FORCEINLINE void atomic_signal_fence(memory_order) BOOST_NOEXCEPT
+{
+    detail::lockpool::signal_fence();
+}
+#endif
+
+} // namespace atomics
+
+using atomics::atomic_thread_fence;
+using atomics::atomic_signal_fence;
+
+} // namespace boost
+
+#endif // BOOST_ATOMIC_FENCES_HPP_INCLUDED_