Added thirdparty: boost library

thirdparty/include/boost/atomic/detail/pause.hpp

@@ -0,0 +1,61 @@
+/*
+ * 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)
+ *
+ * (C) Copyright 2013 Tim Blechmann
+ * (C) Copyright 2013, 2020 Andrey Semashev
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_PAUSE_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_PAUSE_HPP_INCLUDED_
+
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+#if defined(_MSC_VER)
+#if defined(_M_AMD64) || defined(_M_IX86)
+extern "C" void _mm_pause(void);
+#if defined(BOOST_MSVC)
+#pragma intrinsic(_mm_pause)
+#endif
+#elif defined(_M_ARM64) || defined(_M_ARM)
+extern "C" void __yield(void);
+#if defined(BOOST_MSVC)
+#pragma intrinsic(__yield)
+#endif
+#endif
+#endif
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+BOOST_FORCEINLINE void pause() BOOST_NOEXCEPT
+{
+#if defined(_MSC_VER)
+#if defined(_M_AMD64) || defined(_M_IX86)
+    _mm_pause();
+#elif defined(_M_ARM64) || defined(_M_ARM)
+    __yield();
+#endif
+#elif defined(__GNUC__)
+#if defined(__i386__) || defined(__x86_64__)
+    __asm__ __volatile__("pause;" : : : "memory");
+#elif (defined(__ARM_ARCH) && __ARM_ARCH >= 8) || defined(__ARM_ARCH_8A__) || defined(__aarch64__)
+    __asm__ __volatile__("yield;" : : : "memory");
+#endif
+#endif
+}
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost
+
+#include <boost/atomic/detail/footer.hpp>
+
+#endif // BOOST_ATOMIC_DETAIL_PAUSE_HPP_INCLUDED_