233 lines
6.5 KiB
C++
233 lines
6.5 KiB
C++
#ifndef BOOST_ATOMIC_ATOMIC_HPP
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#define BOOST_ATOMIC_ATOMIC_HPP
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// Copyright (c) 2011 Helge Bahmann
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// Copyright (c) 2013 Tim Blechmann
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//
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// Distributed under the Boost Software License, Version 1.0.
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// See 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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#include <cstddef>
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#include <boost/cstdint.hpp>
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#include <boost/memory_order.hpp>
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#include <boost/atomic/detail/config.hpp>
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#include <boost/atomic/detail/platform.hpp>
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#include <boost/atomic/detail/type-classification.hpp>
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#include <boost/type_traits/is_signed.hpp>
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#if defined(BOOST_MSVC) && BOOST_MSVC < 1400
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#include <boost/type_traits/is_integral.hpp>
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#include <boost/mpl/and.hpp>
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#endif
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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#ifndef BOOST_ATOMIC_CHAR_LOCK_FREE
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#define BOOST_ATOMIC_CHAR_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_CHAR16_T_LOCK_FREE
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#define BOOST_ATOMIC_CHAR16_T_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_CHAR32_T_LOCK_FREE
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#define BOOST_ATOMIC_CHAR32_T_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_WCHAR_T_LOCK_FREE
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#define BOOST_ATOMIC_WCHAR_T_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_SHORT_LOCK_FREE
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#define BOOST_ATOMIC_SHORT_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_INT_LOCK_FREE
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#define BOOST_ATOMIC_INT_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_LONG_LOCK_FREE
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#define BOOST_ATOMIC_LONG_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_LLONG_LOCK_FREE
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#define BOOST_ATOMIC_LLONG_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_INT128_LOCK_FREE
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#define BOOST_ATOMIC_INT128_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_POINTER_LOCK_FREE
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#define BOOST_ATOMIC_POINTER_LOCK_FREE 0
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#endif
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#define BOOST_ATOMIC_ADDRESS_LOCK_FREE BOOST_ATOMIC_POINTER_LOCK_FREE
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#ifndef BOOST_ATOMIC_BOOL_LOCK_FREE
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#define BOOST_ATOMIC_BOOL_LOCK_FREE 0
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#endif
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#ifndef BOOST_ATOMIC_THREAD_FENCE
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#define BOOST_ATOMIC_THREAD_FENCE 0
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inline void atomic_thread_fence(memory_order)
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{
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}
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#endif
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#ifndef BOOST_ATOMIC_SIGNAL_FENCE
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#define BOOST_ATOMIC_SIGNAL_FENCE 0
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inline void atomic_signal_fence(memory_order order)
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{
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atomic_thread_fence(order);
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}
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#endif
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template<typename T>
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class atomic :
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public atomics::detail::base_atomic<
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T,
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typename atomics::detail::classify<T>::type,
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atomics::detail::storage_size_of<T>::value,
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#if !defined(BOOST_MSVC) || BOOST_MSVC >= 1400
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boost::is_signed<T>::value
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#else
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// MSVC 2003 has problems instantiating is_signed on non-integral types
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mpl::and_< boost::is_integral<T>, boost::is_signed<T> >::value
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#endif
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>
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{
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private:
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typedef T value_type;
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typedef atomics::detail::base_atomic<
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T,
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typename atomics::detail::classify<T>::type,
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atomics::detail::storage_size_of<T>::value,
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#if !defined(BOOST_MSVC) || BOOST_MSVC >= 1400
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boost::is_signed<T>::value
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#else
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// MSVC 2003 has problems instantiating is_signed on non-itegral types
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mpl::and_< boost::is_integral<T>, boost::is_signed<T> >::value
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#endif
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> super;
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typedef typename super::value_arg_type value_arg_type;
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public:
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BOOST_DEFAULTED_FUNCTION(atomic(void), BOOST_NOEXCEPT {})
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// NOTE: The constructor is made explicit because gcc 4.7 complains that
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// operator=(value_arg_type) is considered ambiguous with operator=(atomic const&)
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// in assignment expressions, even though conversion to atomic<> is less preferred
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// than conversion to value_arg_type.
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explicit BOOST_CONSTEXPR atomic(value_arg_type v) BOOST_NOEXCEPT : super(v) {}
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value_type operator=(value_arg_type v) volatile BOOST_NOEXCEPT
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{
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this->store(v);
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return v;
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}
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operator value_type(void) volatile const BOOST_NOEXCEPT
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{
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return this->load();
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}
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BOOST_DELETED_FUNCTION(atomic(atomic const&))
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BOOST_DELETED_FUNCTION(atomic& operator=(atomic const&) volatile)
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};
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typedef atomic<char> atomic_char;
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typedef atomic<unsigned char> atomic_uchar;
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typedef atomic<signed char> atomic_schar;
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typedef atomic<uint8_t> atomic_uint8_t;
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typedef atomic<int8_t> atomic_int8_t;
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typedef atomic<unsigned short> atomic_ushort;
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typedef atomic<short> atomic_short;
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typedef atomic<uint16_t> atomic_uint16_t;
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typedef atomic<int16_t> atomic_int16_t;
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typedef atomic<unsigned int> atomic_uint;
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typedef atomic<int> atomic_int;
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typedef atomic<uint32_t> atomic_uint32_t;
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typedef atomic<int32_t> atomic_int32_t;
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typedef atomic<unsigned long> atomic_ulong;
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typedef atomic<long> atomic_long;
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typedef atomic<uint64_t> atomic_uint64_t;
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typedef atomic<int64_t> atomic_int64_t;
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#ifdef BOOST_HAS_LONG_LONG
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typedef atomic<boost::ulong_long_type> atomic_ullong;
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typedef atomic<boost::long_long_type> atomic_llong;
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#endif
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typedef atomic<void*> atomic_address;
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typedef atomic<bool> atomic_bool;
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typedef atomic<wchar_t> atomic_wchar_t;
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#if !defined(BOOST_NO_CXX11_CHAR16_T)
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typedef atomic<char16_t> atomic_char16_t;
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#endif
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#if !defined(BOOST_NO_CXX11_CHAR32_T)
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typedef atomic<char32_t> atomic_char32_t;
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#endif
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typedef atomic<int_least8_t> atomic_int_least8_t;
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typedef atomic<uint_least8_t> atomic_uint_least8_t;
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typedef atomic<int_least16_t> atomic_int_least16_t;
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typedef atomic<uint_least16_t> atomic_uint_least16_t;
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typedef atomic<int_least32_t> atomic_int_least32_t;
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typedef atomic<uint_least32_t> atomic_uint_least32_t;
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typedef atomic<int_least64_t> atomic_int_least64_t;
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typedef atomic<uint_least64_t> atomic_uint_least64_t;
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typedef atomic<int_fast8_t> atomic_int_fast8_t;
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typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
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typedef atomic<int_fast16_t> atomic_int_fast16_t;
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typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
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typedef atomic<int_fast32_t> atomic_int_fast32_t;
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typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
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typedef atomic<int_fast64_t> atomic_int_fast64_t;
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typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
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typedef atomic<intmax_t> atomic_intmax_t;
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typedef atomic<uintmax_t> atomic_uintmax_t;
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typedef atomic<std::size_t> atomic_size_t;
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typedef atomic<std::ptrdiff_t> atomic_ptrdiff_t;
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#if defined(BOOST_HAS_INTPTR_T)
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typedef atomic<intptr_t> atomic_intptr_t;
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typedef atomic<uintptr_t> atomic_uintptr_t;
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#endif
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#ifndef BOOST_ATOMIC_FLAG_LOCK_FREE
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#define BOOST_ATOMIC_FLAG_LOCK_FREE 0
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class atomic_flag
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{
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public:
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BOOST_CONSTEXPR atomic_flag(void) BOOST_NOEXCEPT : v_(false) {}
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bool
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test_and_set(memory_order order = memory_order_seq_cst) BOOST_NOEXCEPT
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{
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return v_.exchange(true, order);
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}
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void
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clear(memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT
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{
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v_.store(false, order);
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}
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BOOST_DELETED_FUNCTION(atomic_flag(atomic_flag const&))
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BOOST_DELETED_FUNCTION(atomic_flag& operator=(atomic_flag const&))
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private:
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atomic<bool> v_;
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};
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#endif
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}
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#endif
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