| 1 | // Copyright (C) 2011-2013, 2016 Tim Blechmann |
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| 2 | // |
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| 3 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 4 | // accompanying file LICENSE_1_0.txt or copy at |
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| 5 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | |
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| 7 | #ifndef BOOST_LOCKFREE_DETAIL_ATOMIC_HPP |
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| 8 | #define BOOST_LOCKFREE_DETAIL_ATOMIC_HPP |
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| 9 | |
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| 10 | #include <boost/config.hpp> |
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| 11 | |
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| 12 | #ifndef BOOST_LOCKFREE_FORCE_STD_ATOMIC |
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| 13 | |
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| 14 | #define BOOST_LOCKFREE_NO_HDR_ATOMIC |
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| 15 | |
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| 16 | // MSVC supports atomic<> from version 2012 onwards. |
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| 17 | #if defined(BOOST_MSVC) && (BOOST_MSVC >= 1700) |
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| 18 | #undef BOOST_LOCKFREE_NO_HDR_ATOMIC |
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| 19 | #endif |
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| 20 | |
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| 21 | |
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| 22 | // GCC supports atomic<> from version 4.8 onwards. |
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| 23 | #if (BOOST_GCC >= 40800) && (__cplusplus >= 201103L) |
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| 24 | #undef BOOST_LOCKFREE_NO_HDR_ATOMIC |
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| 25 | #endif |
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| 26 | |
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| 27 | |
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| 28 | // Apple clang is 2 mayor versions ahead, but in fact 1 minor version behind |
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| 29 | #ifdef BOOST_CLANG |
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| 30 | |
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| 31 | #define BOOST_ATOMIC_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) |
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| 32 | |
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| 33 | #if defined(__apple_build_version__) && (BOOST_ATOMIC_CLANG_VERSION >= 60100) && (__cplusplus >= 201103L) |
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| 34 | #undef BOOST_LOCKFREE_NO_HDR_ATOMIC |
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| 35 | #endif |
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| 36 | |
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| 37 | #if !defined(__apple_build_version__) && (BOOST_ATOMIC_CLANG_VERSION >= 30600) && (__cplusplus >= 201103L) |
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| 38 | #undef BOOST_LOCKFREE_NO_HDR_ATOMIC |
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| 39 | #endif |
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| 40 | |
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| 41 | #undef BOOST_ATOMIC_CLANG_VERSION |
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| 42 | |
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| 43 | #endif // BOOST_CLANG |
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| 44 | |
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| 45 | // Stdlib should also be checked |
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| 46 | #include <boost/config.hpp> |
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| 47 | #if defined(BOOST_NO_CXX11_HDR_ATOMIC) && !defined(BOOST_LOCKFREE_NO_HDR_ATOMIC) |
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| 48 | # define BOOST_LOCKFREE_NO_HDR_ATOMIC |
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| 49 | #endif |
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| 50 | |
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| 51 | #endif // BOOST_LOCKFREE_FORCE_STD_ATOMIC |
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| 52 | |
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| 53 | |
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| 54 | #if defined(BOOST_LOCKFREE_NO_HDR_ATOMIC) || defined(BOOST_LOCKFREE_FORCE_BOOST_ATOMIC) |
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| 55 | #include <boost/atomic.hpp> |
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| 56 | #else |
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| 57 | #include <atomic> |
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| 58 | #endif |
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| 59 | |
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| 60 | namespace boost { |
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| 61 | namespace lockfree { |
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| 62 | namespace detail { |
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| 63 | |
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| 64 | #if defined(BOOST_LOCKFREE_NO_HDR_ATOMIC) || defined(BOOST_LOCKFREE_FORCE_BOOST_ATOMIC) |
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| 65 | using boost::atomic; |
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| 66 | using boost::memory_order_acquire; |
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| 67 | using boost::memory_order_consume; |
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| 68 | using boost::memory_order_relaxed; |
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| 69 | using boost::memory_order_release; |
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| 70 | #else |
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| 71 | using std::atomic; |
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| 72 | using std::memory_order_acquire; |
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| 73 | using std::memory_order_consume; |
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| 74 | using std::memory_order_relaxed; |
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| 75 | using std::memory_order_release; |
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| 76 | #endif |
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| 77 | |
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| 78 | } |
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| 79 | using detail::atomic; |
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| 80 | using detail::memory_order_acquire; |
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| 81 | using detail::memory_order_consume; |
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| 82 | using detail::memory_order_relaxed; |
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| 83 | using detail::memory_order_release; |
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| 84 | |
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| 85 | }} |
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| 86 | |
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| 87 | #endif /* BOOST_LOCKFREE_DETAIL_ATOMIC_HPP */ |
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| 88 | |
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