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type_traits/	-	0755	rm
addressof.hpp	1973	0644	edit dl rm
aligned_variable.hpp	1853	0644	edit dl rm
atomic_flag_impl.hpp	4525	0644	edit dl rm
atomic_impl.hpp	56095	0644	edit dl rm
atomic_ref_impl.hpp	54073	0644	edit dl rm
bitwise_cast.hpp	2691	0644	edit dl rm
bitwise_fp_cast.hpp	2509	0644	edit dl rm
capabilities.hpp	7520	0644	edit dl rm
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caps_gcc_atomic.hpp	7438	0644	edit dl rm
caps_gcc_sync.hpp	1715	0644	edit dl rm
caps_linux_arm.hpp	963	0644	edit dl rm
caps_windows.hpp	880	0644	edit dl rm
cas_based_exchange.hpp	1348	0644	edit dl rm
classify.hpp	2133	0644	edit dl rm
config.hpp	7945	0644	edit dl rm
core_arch_operations.hpp	1481	0644	edit dl rm
core_arch_operations_fwd.hpp	972	0644	edit dl rm
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core_operations.hpp	1322	0644	edit dl rm
core_operations_emulated.hpp	8138	0644	edit dl rm
core_operations_emulated_fwd.hpp	1024	0644	edit dl rm
core_operations_fwd.hpp	942	0644	edit dl rm
core_ops_cas_based.hpp	3281	0644	edit dl rm
core_ops_gcc_atomic.hpp	12238	0644	edit dl rm
core_ops_gcc_sync.hpp	10690	0644	edit dl rm
core_ops_linux_arm.hpp	6364	0644	edit dl rm
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extending_cas_based_arithmetic.hpp	2441	0644	edit dl rm
extra_fp_operations.hpp	867	0644	edit dl rm
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extra_fp_ops_emulated.hpp	4864	0644	edit dl rm
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fence_operations.hpp	1007	0644	edit dl rm
fence_operations_emulated.hpp	1294	0644	edit dl rm
fence_ops_gcc_atomic.hpp	2399	0644	edit dl rm
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float_sizes.hpp	7570	0644	edit dl rm
footer.hpp	505	0644	edit dl rm
fp_operations.hpp	807	0644	edit dl rm
fp_operations_fwd.hpp	1001	0644	edit dl rm
fp_ops_emulated.hpp	2714	0644	edit dl rm
fp_ops_generic.hpp	2919	0644	edit dl rm
futex.hpp	5388	0644	edit dl rm
gcc_arm_asm_common.hpp	4031	0644	edit dl rm
gcc_atomic_memory_order_utils.hpp	2804	0644	edit dl rm
header.hpp	2624	0644	edit dl rm
integral_conversions.hpp	4306	0644	edit dl rm
interlocked.hpp	34503	0644	edit dl rm
intptr.hpp	992	0644	edit dl rm
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link.hpp	1534	0644	edit dl rm
lock_pool.hpp	4689	0644	edit dl rm
memory_order_utils.hpp	1576	0644	edit dl rm
once_flag.hpp	1136	0644	edit dl rm
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pause.hpp	1494	0644	edit dl rm
platform.hpp	7210	0644	edit dl rm
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Edit: /usr/include/boost/atomic/detail/core_operations_emulated.hpp (8138B)

/*
 * 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, 2020 Andrey Semashev
 */
/*!
 * \file   atomic/detail/core_operations_emulated.hpp
 *
 * This header contains lock pool-based implementation of the core atomic operations.
 */

#ifndef BOOST_ATOMIC_DETAIL_CORE_OPERATIONS_EMULATED_HPP_INCLUDED_
#define BOOST_ATOMIC_DETAIL_CORE_OPERATIONS_EMULATED_HPP_INCLUDED_

#include <cstddef>
#include <boost/static_assert.hpp>
#include <boost/memory_order.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/storage_traits.hpp>
#include <boost/atomic/detail/core_operations_emulated_fwd.hpp>
#include <boost/atomic/detail/lock_pool.hpp>
#include <boost/atomic/detail/header.hpp>

#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif

namespace boost {
namespace atomics {
namespace detail {

template< std::size_t Size, std::size_t Alignment, bool = Alignment >= storage_traits< Size >::native_alignment >
struct core_operations_emulated_base
{
    typedef typename storage_traits< Size >::type storage_type;
};

template< std::size_t Size, std::size_t Alignment >
struct core_operations_emulated_base< Size, Alignment, false >
{
    typedef buffer_storage< Size, Alignment > storage_type;
};

//! Emulated implementation of core atomic operations
template< std::size_t Size, std::size_t Alignment, bool Signed, bool Interprocess >
struct core_operations_emulated :
    public core_operations_emulated_base< Size, Alignment >
{
    typedef core_operations_emulated_base< Size, Alignment > base_type;

// Define storage_type to have alignment not greater than Alignment. This will allow operations to work with value_types
    // that possibly have weaker alignment requirements than storage_traits< Size >::type would. This is important for atomic_ref<>.
    // atomic<> will allow higher alignment requirement than its value_type.
    // Note that storage_type should be an integral type, if possible, so that arithmetic and bitwise operations are possible.
    typedef typename base_type::storage_type storage_type;

static BOOST_CONSTEXPR_OR_CONST std::size_t storage_size = Size;
    static BOOST_CONSTEXPR_OR_CONST std::size_t storage_alignment = Alignment >= storage_traits< Size >::alignment ? storage_traits< Size >::alignment : Alignment;

static BOOST_CONSTEXPR_OR_CONST bool is_signed = Signed;
    static BOOST_CONSTEXPR_OR_CONST bool is_interprocess = Interprocess;
    static BOOST_CONSTEXPR_OR_CONST bool full_cas_based = false;

static BOOST_CONSTEXPR_OR_CONST bool is_always_lock_free = false;

typedef lock_pool::scoped_lock< storage_alignment > scoped_lock;

static void store(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        scoped_lock lock(&storage);
        const_cast< storage_type& >(storage) = v;
    }

static storage_type load(storage_type const volatile& storage, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        scoped_lock lock(&storage);
        return const_cast< storage_type const& >(storage);
    }

static storage_type fetch_add(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        s += v;
        return old_val;
    }

static storage_type fetch_sub(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        s -= v;
        return old_val;
    }

static storage_type exchange(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        s = v;
        return old_val;
    }

static bool compare_exchange_strong(
        storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        const bool res = old_val == expected;
        if (res)
            s = desired;
        expected = old_val;

return res;
    }

static bool compare_exchange_weak(
        storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order, memory_order) BOOST_NOEXCEPT
    {
        // Note: This function is the exact copy of compare_exchange_strong. The reason we're not just forwarding the call
        // is that MSVC-12 ICEs in this case.
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        const bool res = old_val == expected;
        if (res)
            s = desired;
        expected = old_val;

return res;
    }

static storage_type fetch_and(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        s &= v;
        return old_val;
    }

static storage_type fetch_or(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        s |= v;
        return old_val;
    }

static storage_type fetch_xor(storage_type volatile& storage, storage_type v, memory_order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        storage_type& s = const_cast< storage_type& >(storage);
        scoped_lock lock(&storage);
        storage_type old_val = s;
        s ^= v;
        return old_val;
    }

static BOOST_FORCEINLINE bool test_and_set(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        return !!exchange(storage, (storage_type)1, order);
    }

static BOOST_FORCEINLINE void clear(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
    {
        BOOST_STATIC_ASSERT_MSG(!is_interprocess, "Boost.Atomic: operation invoked on a non-lock-free inter-process atomic object");
        store(storage, (storage_type)0, order);
    }
};

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

#include <boost/atomic/detail/footer.hpp>

#endif // BOOST_ATOMIC_DETAIL_CORE_OPERATIONS_EMULATED_HPP_INCLUDED_

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