/storage/packages/boost/1.61_gcc-5.3/include/boost/atomic/detail/ops_gcc_atomic.hpp


/*
 * 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) 2014 Andrey Semashev
 */
/*!
 * \file   atomic/detail/ops_gcc_atomic.hpp
 *
 * This header contains implementation of the \c operations template.
 */

#ifndef BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_
#define BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_

#include <boost/memory_order.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/storage_type.hpp>
#include <boost/atomic/detail/operations_fwd.hpp>
#include <boost/atomic/capabilities.hpp>
#if defined(__clang__) && (defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B) || defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B))
#include <boost/atomic/detail/ops_gcc_x86_dcas.hpp>
#include <boost/atomic/detail/ops_cas_based.hpp>
#endif

#if __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE || __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE ||\
    __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE || __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE ||\
    __GCC_ATOMIC_CHAR_LOCK_FREE != BOOST_ATOMIC_CHAR_LOCK_FREE || __GCC_ATOMIC_BOOL_LOCK_FREE != BOOST_ATOMIC_BOOL_LOCK_FREE ||\
    __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE
// There are platforms where we need to use larger storage types
#include <boost/atomic/detail/int_sizes.hpp>
#include <boost/atomic/detail/ops_extending_cas_based.hpp>
#endif

#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif

#if defined(__INTEL_COMPILER)
// This is used to suppress warning #32013 described below for Intel Compiler.
// In debug builds the compiler does not inline any functions, so basically
// every atomic function call results in this warning. I don't know any other
// way to selectively disable just this one warning.
#pragma system_header
#endif

namespace boost {
namespace atomics {
namespace detail {

/*!
 * The function converts \c boost::memory_order values to the compiler-specific constants.
 *
 * NOTE: The intention is that the function is optimized away by the compiler, and the
 *       compiler-specific constants are passed to the intrinsics. I know constexpr doesn't
 *       work in this case because the standard atomics interface require memory ordering
 *       constants to be passed as function arguments, at which point they stop being constexpr.
 *       However it is crucial that the compiler sees constants and not runtime values,
 *       because otherwise it just ignores the ordering value and always uses seq_cst.
 *       This is the case with Intel C++ Compiler 14.0.3 (Composer XE 2013 SP1, update 3) and
 *       gcc 4.8.2. Intel Compiler issues a warning in this case:
 *
 *       warning #32013: Invalid memory order specified. Defaulting to seq_cst memory order.
 *
 *       while gcc acts silently.
 *
 *       To mitigate the problem ALL functions, including the atomic<> members must be
 *       declared with BOOST_FORCEINLINE. In this case the compilers are able to see that
 *       all functions are called with constant orderings and call intrinstcts properly.
 *
 *       Unfortunately, this still doesn't work in debug mode as the compiler doesn't
 *       inline functions even when marked with BOOST_FORCEINLINE. In this case all atomic
 *       operaions will be executed with seq_cst semantics.
 */
BOOST_FORCEINLINE BOOST_CONSTEXPR int convert_memory_order_to_gcc(memory_order order) BOOST_NOEXCEPT
{
    return (order == memory_order_relaxed ? __ATOMIC_RELAXED : (order == memory_order_consume ? __ATOMIC_CONSUME :
        (order == memory_order_acquire ? __ATOMIC_ACQUIRE : (order == memory_order_release ? __ATOMIC_RELEASE :
        (order == memory_order_acq_rel ? __ATOMIC_ACQ_REL : __ATOMIC_SEQ_CST)))));
}

template< typename T >
struct gcc_atomic_operations
{
    typedef T storage_type;

    static BOOST_FORCEINLINE void store(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        __atomic_store_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE storage_type load(storage_type const volatile& storage, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_load_n(&storage, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE storage_type fetch_add(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_fetch_add(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE storage_type fetch_sub(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_fetch_sub(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE storage_type exchange(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_exchange_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE bool compare_exchange_strong(
        storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT
    {
        return __atomic_compare_exchange_n
        (
            &storage, &expected, desired, false,
            atomics::detail::convert_memory_order_to_gcc(success_order),
            atomics::detail::convert_memory_order_to_gcc(failure_order)
        );
    }

    static BOOST_FORCEINLINE bool compare_exchange_weak(
        storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT
    {
        return __atomic_compare_exchange_n
        (
            &storage, &expected, desired, true,
            atomics::detail::convert_memory_order_to_gcc(success_order),
            atomics::detail::convert_memory_order_to_gcc(failure_order)
        );
    }

    static BOOST_FORCEINLINE storage_type fetch_and(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_fetch_and(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE storage_type fetch_or(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_fetch_or(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE storage_type fetch_xor(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_fetch_xor(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE bool test_and_set(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
    {
        return __atomic_test_and_set(&storage, atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE void clear(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
    {
        __atomic_clear(const_cast< storage_type* >(&storage), atomics::detail::convert_memory_order_to_gcc(order));
    }

    static BOOST_FORCEINLINE bool is_lock_free(storage_type const volatile& storage) BOOST_NOEXCEPT
    {
        return __atomic_is_lock_free(sizeof(storage_type), &storage);
    }
};

#if BOOST_ATOMIC_INT128_LOCK_FREE > 0
#if defined(__clang__) && defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B)

// Workaround for clang bug: http://llvm.org/bugs/show_bug.cgi?id=19149
// Clang 3.4 does not implement 128-bit __atomic* intrinsics even though it defines __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
template< bool Signed >
struct operations< 16u, Signed > :
    public cas_based_operations< gcc_dcas_x86_64< Signed > >
{
};

#else

template< bool Signed >
struct operations< 16u, Signed > :
    public gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >
{
    typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
};

#endif
#endif


#if BOOST_ATOMIC_INT64_LOCK_FREE > 0
#if defined(__clang__) && defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B)

// Workaround for clang bug http://llvm.org/bugs/show_bug.cgi?id=19355
template< bool Signed >
struct operations< 8u, Signed > :
    public cas_based_operations< gcc_dcas_x86< Signed > >
{
};

#elif (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 8 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 8 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 8 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 8 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 8 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)

#define BOOST_ATOMIC_DETAIL_INT64_EXTENDED

template< bool Signed >
struct operations< 8u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 8u, Signed >
{
    typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
};

#else

template< bool Signed >
struct operations< 8u, Signed > :
    public gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >
{
    typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
};

#endif
#endif

#if BOOST_ATOMIC_INT32_LOCK_FREE > 0
#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 4 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 4 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 4 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 4 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 4 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)

#define BOOST_ATOMIC_DETAIL_INT32_EXTENDED

#if !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)

template< bool Signed >
struct operations< 4u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 4u, Signed >
{
    typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
};

#else // !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)

template< bool Signed >
struct operations< 4u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 4u, Signed >
{
    typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
};

#endif // !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)

#else

template< bool Signed >
struct operations< 4u, Signed > :
    public gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >
{
    typedef typename make_storage_type< 4u, Signed >::aligned aligned_storage_type;
};

#endif
#endif

#if BOOST_ATOMIC_INT16_LOCK_FREE > 0
#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 2 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 2 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 2 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 2 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 2 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)

#define BOOST_ATOMIC_DETAIL_INT16_EXTENDED

#if !defined(BOOST_ATOMIC_DETAIL_INT32_EXTENDED)

template< bool Signed >
struct operations< 2u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >, 2u, Signed >
{
    typedef typename make_storage_type< 4u, Signed >::aligned aligned_storage_type;
};

#elif !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)

template< bool Signed >
struct operations< 2u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 2u, Signed >
{
    typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
};

#else

template< bool Signed >
struct operations< 2u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 2u, Signed >
{
    typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
};

#endif

#else

template< bool Signed >
struct operations< 2u, Signed > :
    public gcc_atomic_operations< typename make_storage_type< 2u, Signed >::type >
{
    typedef typename make_storage_type< 2u, Signed >::aligned aligned_storage_type;
};

#endif
#endif

#if BOOST_ATOMIC_INT8_LOCK_FREE > 0
#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 1 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 1 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 1 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 1 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
    (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 1 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE) ||\
    (__GCC_ATOMIC_CHAR_LOCK_FREE != BOOST_ATOMIC_CHAR_LOCK_FREE) ||\
    (__GCC_ATOMIC_BOOL_LOCK_FREE != BOOST_ATOMIC_BOOL_LOCK_FREE)

#if !defined(BOOST_ATOMIC_DETAIL_INT16_EXTENDED)

template< bool Signed >
struct operations< 1u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 2u, Signed >::type >, 1u, Signed >
{
    typedef typename make_storage_type< 2u, Signed >::aligned aligned_storage_type;
};

#elif !defined(BOOST_ATOMIC_DETAIL_INT32_EXTENDED)

template< bool Signed >
struct operations< 1u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >, 1u, Signed >
{
    typedef typename make_storage_type< 4u, Signed >::aligned aligned_storage_type;
};

#elif !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)

template< bool Signed >
struct operations< 1u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 1u, Signed >
{
    typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
};

#else

template< bool Signed >
struct operations< 1u, Signed > :
    public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 1u, Signed >
{
    typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
};

#endif

#else

template< bool Signed >
struct operations< 1u, Signed > :
    public gcc_atomic_operations< typename make_storage_type< 1u, Signed >::type >
{
    typedef typename make_storage_type< 1u, Signed >::aligned aligned_storage_type;
};

#endif
#endif

#undef BOOST_ATOMIC_DETAIL_INT16_EXTENDED
#undef BOOST_ATOMIC_DETAIL_INT32_EXTENDED
#undef BOOST_ATOMIC_DETAIL_INT64_EXTENDED

BOOST_FORCEINLINE void thread_fence(memory_order order) BOOST_NOEXCEPT
{
    __atomic_thread_fence(atomics::detail::convert_memory_order_to_gcc(order));
}

BOOST_FORCEINLINE void signal_fence(memory_order order) BOOST_NOEXCEPT
{
    __atomic_signal_fence(atomics::detail::convert_memory_order_to_gcc(order));
}

} // namespace detail
} // namespace atomics
} // namespace boost

#endif // BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_


Line	% of fetches	Source
1		/*
2		* Distributed under the Boost Software License, Version 1.0.
3		* (See accompanying file LICENSE_1_0.txt or copy at
4		* http://www.boost.org/LICENSE_1_0.txt)
5		*
6		* Copyright (c) 2014 Andrey Semashev
7		*/
8		/*!
9		* \file atomic/detail/ops_gcc_atomic.hpp
10		*
11		* This header contains implementation of the \c operations template.
12		*/
13
14		#ifndef BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_
15		#define BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_
16
17		#include <boost/memory_order.hpp>
18		#include <boost/atomic/detail/config.hpp>
19		#include <boost/atomic/detail/storage_type.hpp>
20		#include <boost/atomic/detail/operations_fwd.hpp>
21		#include <boost/atomic/capabilities.hpp>
22		#if defined(__clang__) && (defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B) \|\| defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B))
23		#include <boost/atomic/detail/ops_gcc_x86_dcas.hpp>
24		#include <boost/atomic/detail/ops_cas_based.hpp>
25		#endif
26
27		#if __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE \|\| __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE \|\|\
28		__GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE \|\| __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE \|\|\
29		__GCC_ATOMIC_CHAR_LOCK_FREE != BOOST_ATOMIC_CHAR_LOCK_FREE \|\| __GCC_ATOMIC_BOOL_LOCK_FREE != BOOST_ATOMIC_BOOL_LOCK_FREE \|\|\
30		__GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE
31		// There are platforms where we need to use larger storage types
32		#include <boost/atomic/detail/int_sizes.hpp>
33		#include <boost/atomic/detail/ops_extending_cas_based.hpp>
34		#endif
35
36		#ifdef BOOST_HAS_PRAGMA_ONCE
37		#pragma once
38		#endif
39
40		#if defined(__INTEL_COMPILER)
41		// This is used to suppress warning #32013 described below for Intel Compiler.
42		// In debug builds the compiler does not inline any functions, so basically
43		// every atomic function call results in this warning. I don't know any other
44		// way to selectively disable just this one warning.
45		#pragma system_header
46		#endif
47
48		namespace boost {
49		namespace atomics {
50		namespace detail {
51
52		/*!
53		* The function converts \c boost::memory_order values to the compiler-specific constants.
54		*
55		* NOTE: The intention is that the function is optimized away by the compiler, and the
56		* compiler-specific constants are passed to the intrinsics. I know constexpr doesn't
57		* work in this case because the standard atomics interface require memory ordering
58		* constants to be passed as function arguments, at which point they stop being constexpr.
59		* However it is crucial that the compiler sees constants and not runtime values,
60		* because otherwise it just ignores the ordering value and always uses seq_cst.
61		* This is the case with Intel C++ Compiler 14.0.3 (Composer XE 2013 SP1, update 3) and
62		* gcc 4.8.2. Intel Compiler issues a warning in this case:
63		*
64		* warning #32013: Invalid memory order specified. Defaulting to seq_cst memory order.
65		*
66		* while gcc acts silently.
67		*
68		* To mitigate the problem ALL functions, including the atomic<> members must be
69		* declared with BOOST_FORCEINLINE. In this case the compilers are able to see that
70		* all functions are called with constant orderings and call intrinstcts properly.
71		*
72		* Unfortunately, this still doesn't work in debug mode as the compiler doesn't
73		* inline functions even when marked with BOOST_FORCEINLINE. In this case all atomic
74		* operaions will be executed with seq_cst semantics.
75		*/
76		BOOST_FORCEINLINE BOOST_CONSTEXPR int convert_memory_order_to_gcc(memory_order order) BOOST_NOEXCEPT
77		{
78		return (order == memory_order_relaxed ? __ATOMIC_RELAXED : (order == memory_order_consume ? __ATOMIC_CONSUME :
79		(order == memory_order_acquire ? __ATOMIC_ACQUIRE : (order == memory_order_release ? __ATOMIC_RELEASE :
80		(order == memory_order_acq_rel ? __ATOMIC_ACQ_REL : __ATOMIC_SEQ_CST)))));
81		}
82
83		template< typename T >
84		struct gcc_atomic_operations
85		{
86		typedef T storage_type;
87
88		static BOOST_FORCEINLINE void store(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
89		{
90		__atomic_store_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
91		}
92
93		static BOOST_FORCEINLINE storage_type load(storage_type const volatile& storage, memory_order order) BOOST_NOEXCEPT
94		{
95		return __atomic_load_n(&storage, atomics::detail::convert_memory_order_to_gcc(order));
96		}
97
98		static BOOST_FORCEINLINE storage_type fetch_add(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
99		{
100		return __atomic_fetch_add(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
101		}
102
103		static BOOST_FORCEINLINE storage_type fetch_sub(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
104		{
105		return __atomic_fetch_sub(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
106		}
107
108		static BOOST_FORCEINLINE storage_type exchange(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
109		{
110		return __atomic_exchange_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
111		}
112
113		static BOOST_FORCEINLINE bool compare_exchange_strong(
114		storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT
115		{
116		return __atomic_compare_exchange_n
117		(
118		&storage, &expected, desired, false,
119		atomics::detail::convert_memory_order_to_gcc(success_order),
120		atomics::detail::convert_memory_order_to_gcc(failure_order)
121		);
122		}
123
124		static BOOST_FORCEINLINE bool compare_exchange_weak(
125		storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT
126		{
127		return __atomic_compare_exchange_n
128		(
129		&storage, &expected, desired, true,
130		atomics::detail::convert_memory_order_to_gcc(success_order),
131		atomics::detail::convert_memory_order_to_gcc(failure_order)
132		);
133		}
134
135		static BOOST_FORCEINLINE storage_type fetch_and(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
136		{
137		return __atomic_fetch_and(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
138		}
139
140		static BOOST_FORCEINLINE storage_type fetch_or(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
141		{
142		return __atomic_fetch_or(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
143		}
144
145		static BOOST_FORCEINLINE storage_type fetch_xor(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
146		{
147		return __atomic_fetch_xor(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
148		}
149
150		static BOOST_FORCEINLINE bool test_and_set(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
151		{
152		return __atomic_test_and_set(&storage, atomics::detail::convert_memory_order_to_gcc(order));
153		}
154
155		static BOOST_FORCEINLINE void clear(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
156		{
157		__atomic_clear(const_cast< storage_type* >(&storage), atomics::detail::convert_memory_order_to_gcc(order));
158		}
159
160		static BOOST_FORCEINLINE bool is_lock_free(storage_type const volatile& storage) BOOST_NOEXCEPT
161		{
162		return __atomic_is_lock_free(sizeof(storage_type), &storage);
163		}
164		};
165
166		#if BOOST_ATOMIC_INT128_LOCK_FREE > 0
167		#if defined(__clang__) && defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B)
168
169		// Workaround for clang bug: http://llvm.org/bugs/show_bug.cgi?id=19149
170		// Clang 3.4 does not implement 128-bit __atomic* intrinsics even though it defines __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
171		template< bool Signed >
172		struct operations< 16u, Signed > :
173		public cas_based_operations< gcc_dcas_x86_64< Signed > >
174		{
175		};
176
177		#else
178
179		template< bool Signed >
180		struct operations< 16u, Signed > :
181		public gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >
182		{
183		typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
184		};
185
186		#endif
187		#endif
188
189
190		#if BOOST_ATOMIC_INT64_LOCK_FREE > 0
191		#if defined(__clang__) && defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B)
192
193		// Workaround for clang bug http://llvm.org/bugs/show_bug.cgi?id=19355
194		template< bool Signed >
195		struct operations< 8u, Signed > :
196		public cas_based_operations< gcc_dcas_x86< Signed > >
197		{
198		};
199
200		#elif (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 8 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) \|\|\
201		(BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 8 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) \|\|\
202		(BOOST_ATOMIC_DETAIL_SIZEOF_INT == 8 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) \|\|\
203		(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 8 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) \|\|\
204		(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 8 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)
205
206		#define BOOST_ATOMIC_DETAIL_INT64_EXTENDED
207
208		template< bool Signed >
209		struct operations< 8u, Signed > :
210		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 8u, Signed >
211		{
212		typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
213		};
214
215		#else
216
217		template< bool Signed >
218		struct operations< 8u, Signed > :
219		public gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >
220		{
221		typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
222		};
223
224		#endif
225		#endif
226
227		#if BOOST_ATOMIC_INT32_LOCK_FREE > 0
228		#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 4 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) \|\|\
229		(BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 4 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) \|\|\
230		(BOOST_ATOMIC_DETAIL_SIZEOF_INT == 4 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) \|\|\
231		(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 4 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) \|\|\
232		(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 4 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)
233
234		#define BOOST_ATOMIC_DETAIL_INT32_EXTENDED
235
236		#if !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
237
238		template< bool Signed >
239		struct operations< 4u, Signed > :
240		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 4u, Signed >
241		{
242		typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
243		};
244
245		#else // !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
246
247		template< bool Signed >
248		struct operations< 4u, Signed > :
249		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 4u, Signed >
250		{
251		typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
252		};
253
254		#endif // !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
255
256		#else
257
258		template< bool Signed >
259		struct operations< 4u, Signed > :
260		public gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >
261		{
262		typedef typename make_storage_type< 4u, Signed >::aligned aligned_storage_type;
263		};
264
265		#endif
266		#endif
267
268		#if BOOST_ATOMIC_INT16_LOCK_FREE > 0
269		#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 2 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) \|\|\
270		(BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 2 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) \|\|\
271		(BOOST_ATOMIC_DETAIL_SIZEOF_INT == 2 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) \|\|\
272		(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 2 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) \|\|\
273		(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 2 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)
274
275		#define BOOST_ATOMIC_DETAIL_INT16_EXTENDED
276
277		#if !defined(BOOST_ATOMIC_DETAIL_INT32_EXTENDED)
278
279		template< bool Signed >
280		struct operations< 2u, Signed > :
281		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >, 2u, Signed >
282		{
283		typedef typename make_storage_type< 4u, Signed >::aligned aligned_storage_type;
284		};
285
286		#elif !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
287
288		template< bool Signed >
289		struct operations< 2u, Signed > :
290		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 2u, Signed >
291		{
292		typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
293		};
294
295		#else
296
297		template< bool Signed >
298		struct operations< 2u, Signed > :
299		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 2u, Signed >
300		{
301		typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
302		};
303
304		#endif
305
306		#else
307
308		template< bool Signed >
309		struct operations< 2u, Signed > :
310		public gcc_atomic_operations< typename make_storage_type< 2u, Signed >::type >
311		{
312		typedef typename make_storage_type< 2u, Signed >::aligned aligned_storage_type;
313		};
314
315		#endif
316		#endif
317
318		#if BOOST_ATOMIC_INT8_LOCK_FREE > 0
319		#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 1 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) \|\|\
320		(BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 1 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) \|\|\
321		(BOOST_ATOMIC_DETAIL_SIZEOF_INT == 1 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) \|\|\
322		(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 1 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) \|\|\
323		(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 1 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE) \|\|\
324		(__GCC_ATOMIC_CHAR_LOCK_FREE != BOOST_ATOMIC_CHAR_LOCK_FREE) \|\|\
325		(__GCC_ATOMIC_BOOL_LOCK_FREE != BOOST_ATOMIC_BOOL_LOCK_FREE)
326
327		#if !defined(BOOST_ATOMIC_DETAIL_INT16_EXTENDED)
328
329		template< bool Signed >
330		struct operations< 1u, Signed > :
331		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 2u, Signed >::type >, 1u, Signed >
332		{
333		typedef typename make_storage_type< 2u, Signed >::aligned aligned_storage_type;
334		};
335
336		#elif !defined(BOOST_ATOMIC_DETAIL_INT32_EXTENDED)
337
338		template< bool Signed >
339		struct operations< 1u, Signed > :
340		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >, 1u, Signed >
341		{
342		typedef typename make_storage_type< 4u, Signed >::aligned aligned_storage_type;
343		};
344
345		#elif !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
346
347		template< bool Signed >
348		struct operations< 1u, Signed > :
349		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 1u, Signed >
350		{
351		typedef typename make_storage_type< 8u, Signed >::aligned aligned_storage_type;
352		};
353
354		#else
355
356		template< bool Signed >
357		struct operations< 1u, Signed > :
358		public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 1u, Signed >
359		{
360		typedef typename make_storage_type< 16u, Signed >::aligned aligned_storage_type;
361		};
362
363		#endif
364
365		#else
366
367		template< bool Signed >
368		struct operations< 1u, Signed > :
369		public gcc_atomic_operations< typename make_storage_type< 1u, Signed >::type >
370		{
371		typedef typename make_storage_type< 1u, Signed >::aligned aligned_storage_type;
372		};
373
374		#endif
375		#endif
376
377		#undef BOOST_ATOMIC_DETAIL_INT16_EXTENDED
378		#undef BOOST_ATOMIC_DETAIL_INT32_EXTENDED
379		#undef BOOST_ATOMIC_DETAIL_INT64_EXTENDED
380
381		BOOST_FORCEINLINE void thread_fence(memory_order order) BOOST_NOEXCEPT
382		{
383		__atomic_thread_fence(atomics::detail::convert_memory_order_to_gcc(order));
384		}
385
386		BOOST_FORCEINLINE void signal_fence(memory_order order) BOOST_NOEXCEPT
387		{
388		__atomic_signal_fence(atomics::detail::convert_memory_order_to_gcc(order));
389		}
390
391		} // namespace detail
392		} // namespace atomics
393		} // namespace boost
394
395		#endif // BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_
396