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88 lines
2.3 KiB
88 lines
2.3 KiB
5 years ago
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// Copyright (C) 2011-2013, 2016 Tim Blechmann
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_LOCKFREE_DETAIL_ATOMIC_HPP
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#define BOOST_LOCKFREE_DETAIL_ATOMIC_HPP
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#include <boost/config.hpp>
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#ifndef BOOST_LOCKFREE_FORCE_STD_ATOMIC
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#define BOOST_LOCKFREE_NO_HDR_ATOMIC
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// MSVC supports atomic<> from version 2012 onwards.
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#if defined(BOOST_MSVC) && (BOOST_MSVC >= 1700)
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#undef BOOST_LOCKFREE_NO_HDR_ATOMIC
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#endif
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// GCC supports atomic<> from version 4.8 onwards.
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#if (BOOST_GCC >= 40800) && (__cplusplus >= 201103L)
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#undef BOOST_LOCKFREE_NO_HDR_ATOMIC
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#endif
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// Apple clang is 2 mayor versions ahead, but in fact 1 minor version behind
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#ifdef BOOST_CLANG
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#define BOOST_ATOMIC_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
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#if defined(__apple_build_version__) && (BOOST_ATOMIC_CLANG_VERSION >= 60100) && (__cplusplus >= 201103L)
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#undef BOOST_LOCKFREE_NO_HDR_ATOMIC
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#endif
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#if !defined(__apple_build_version__) && (BOOST_ATOMIC_CLANG_VERSION >= 30600) && (__cplusplus >= 201103L)
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#undef BOOST_LOCKFREE_NO_HDR_ATOMIC
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#endif
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#undef BOOST_ATOMIC_CLANG_VERSION
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#endif // BOOST_CLANG
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// Stdlib should also be checked
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#include <boost/config.hpp>
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#if defined(BOOST_NO_CXX11_HDR_ATOMIC) && !defined(BOOST_LOCKFREE_NO_HDR_ATOMIC)
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# define BOOST_LOCKFREE_NO_HDR_ATOMIC
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#endif
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#endif // BOOST_LOCKFREE_FORCE_STD_ATOMIC
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#if defined(BOOST_LOCKFREE_NO_HDR_ATOMIC) || defined(BOOST_LOCKFREE_FORCE_BOOST_ATOMIC)
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#include <boost/atomic.hpp>
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#else
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#include <atomic>
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#endif
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namespace boost {
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namespace lockfree {
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namespace detail {
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#if defined(BOOST_LOCKFREE_NO_HDR_ATOMIC) || defined(BOOST_LOCKFREE_FORCE_BOOST_ATOMIC)
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using boost::atomic;
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using boost::memory_order_acquire;
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using boost::memory_order_consume;
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using boost::memory_order_relaxed;
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using boost::memory_order_release;
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#else
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using std::atomic;
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using std::memory_order_acquire;
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using std::memory_order_consume;
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using std::memory_order_relaxed;
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using std::memory_order_release;
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#endif
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}
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using detail::atomic;
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using detail::memory_order_acquire;
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using detail::memory_order_consume;
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using detail::memory_order_relaxed;
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using detail::memory_order_release;
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}}
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#endif /* BOOST_LOCKFREE_DETAIL_ATOMIC_HPP */
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