| /* |
| * 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) 2011 Helge Bahmann |
| * Copyright (c) 2013 Tim Blechmann |
| * Copyright (c) 2014 Andrey Semashev |
| */ |
| /*! |
| * \file atomic/detail/atomic_template.hpp |
| * |
| * This header contains interface definition of \c atomic template. |
| */ |
| |
| #ifndef BOOST_ATOMIC_DETAIL_ATOMIC_TEMPLATE_HPP_INCLUDED_ |
| #define BOOST_ATOMIC_DETAIL_ATOMIC_TEMPLATE_HPP_INCLUDED_ |
| |
| #include <cstddef> |
| #include <boost/cstdint.hpp> |
| #include <boost/assert.hpp> |
| #include <boost/type_traits/is_signed.hpp> |
| #include <boost/type_traits/is_integral.hpp> |
| #include <boost/atomic/detail/config.hpp> |
| #include <boost/atomic/detail/casts.hpp> |
| #include <boost/atomic/detail/operations_fwd.hpp> |
| |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| #pragma once |
| #endif |
| |
| #if defined(BOOST_MSVC) |
| #pragma warning(push) |
| // 'boost::atomics::atomic<T>' : multiple assignment operators specified |
| #pragma warning(disable: 4522) |
| #endif |
| |
| /* |
| * IMPLEMENTATION NOTE: All interface functions MUST be declared with BOOST_FORCEINLINE, |
| * see comment for convert_memory_order_to_gcc in ops_gcc_atomic.hpp. |
| */ |
| |
| namespace boost { |
| namespace atomics { |
| namespace detail { |
| |
| BOOST_FORCEINLINE BOOST_CONSTEXPR memory_order deduce_failure_order(memory_order order) BOOST_NOEXCEPT |
| { |
| return order == memory_order_acq_rel ? memory_order_acquire : (order == memory_order_release ? memory_order_relaxed : order); |
| } |
| |
| BOOST_FORCEINLINE BOOST_CONSTEXPR bool cas_failure_order_must_not_be_stronger_than_success_order(memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT |
| { |
| // 15 == (memory_order_seq_cst | memory_order_consume), see memory_order.hpp |
| // Given the enum values we can test the strength of memory order requirements with this single condition. |
| return (failure_order & 15u) <= (success_order & 15u); |
| } |
| |
| template< typename T, bool IsInt = boost::is_integral< T >::value > |
| struct classify |
| { |
| typedef void type; |
| }; |
| |
| template< typename T > |
| struct classify< T, true > { typedef int type; }; |
| |
| template< typename T > |
| struct classify< T*, false > { typedef void* type; }; |
| |
| template< typename T, typename Kind > |
| class base_atomic; |
| |
| //! Implementation for integers |
| template< typename T > |
| class base_atomic< T, int > |
| { |
| private: |
| typedef T value_type; |
| typedef T difference_type; |
| typedef atomics::detail::operations< storage_size_of< value_type >::value, boost::is_signed< T >::value > operations; |
| |
| protected: |
| typedef value_type value_arg_type; |
| |
| public: |
| typedef typename operations::storage_type storage_type; |
| |
| protected: |
| storage_type m_storage; |
| |
| public: |
| BOOST_DEFAULTED_FUNCTION(base_atomic(), {}) |
| BOOST_CONSTEXPR explicit base_atomic(value_type v) BOOST_NOEXCEPT : m_storage(v) {} |
| |
| BOOST_FORCEINLINE void store(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_consume); |
| BOOST_ASSERT(order != memory_order_acquire); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| operations::store(m_storage, static_cast< storage_type >(v), order); |
| } |
| |
| BOOST_FORCEINLINE value_type load(memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_release); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| return static_cast< value_type >(operations::load(m_storage, order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_add(difference_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return static_cast< value_type >(operations::fetch_add(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_sub(difference_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return static_cast< value_type >(operations::fetch_sub(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type exchange(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return static_cast< value_type >(operations::exchange(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = static_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_strong(m_storage, old_value, static_cast< storage_type >(desired), success_order, failure_order); |
| expected = static_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_strong(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = static_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_weak(m_storage, old_value, static_cast< storage_type >(desired), success_order, failure_order); |
| expected = static_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_weak(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_and(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return static_cast< value_type >(operations::fetch_and(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_or(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return static_cast< value_type >(operations::fetch_or(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_xor(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return static_cast< value_type >(operations::fetch_xor(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE bool is_lock_free() const volatile BOOST_NOEXCEPT |
| { |
| return operations::is_lock_free(m_storage); |
| } |
| |
| BOOST_FORCEINLINE value_type operator++(int) volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(1); |
| } |
| |
| BOOST_FORCEINLINE value_type operator++() volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(1) + 1; |
| } |
| |
| BOOST_FORCEINLINE value_type operator--(int) volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(1); |
| } |
| |
| BOOST_FORCEINLINE value_type operator--() volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(1) - 1; |
| } |
| |
| BOOST_FORCEINLINE value_type operator+=(difference_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(v) + v; |
| } |
| |
| BOOST_FORCEINLINE value_type operator-=(difference_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(v) - v; |
| } |
| |
| BOOST_FORCEINLINE value_type operator&=(value_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_and(v) & v; |
| } |
| |
| BOOST_FORCEINLINE value_type operator|=(value_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_or(v) | v; |
| } |
| |
| BOOST_FORCEINLINE value_type operator^=(value_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_xor(v) ^ v; |
| } |
| |
| BOOST_DELETED_FUNCTION(base_atomic(base_atomic const&)) |
| BOOST_DELETED_FUNCTION(base_atomic& operator=(base_atomic const&)) |
| }; |
| |
| //! Implementation for bool |
| template< > |
| class base_atomic< bool, int > |
| { |
| private: |
| typedef bool value_type; |
| typedef atomics::detail::operations< 1u, false > operations; |
| |
| protected: |
| typedef value_type value_arg_type; |
| |
| public: |
| typedef operations::storage_type storage_type; |
| |
| protected: |
| storage_type m_storage; |
| |
| public: |
| BOOST_DEFAULTED_FUNCTION(base_atomic(), {}) |
| BOOST_CONSTEXPR explicit base_atomic(value_type v) BOOST_NOEXCEPT : m_storage(v) {} |
| |
| BOOST_FORCEINLINE void store(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_consume); |
| BOOST_ASSERT(order != memory_order_acquire); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| operations::store(m_storage, static_cast< storage_type >(v), order); |
| } |
| |
| BOOST_FORCEINLINE value_type load(memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_release); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| return !!operations::load(m_storage, order); |
| } |
| |
| BOOST_FORCEINLINE value_type exchange(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return !!operations::exchange(m_storage, static_cast< storage_type >(v), order); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = static_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_strong(m_storage, old_value, static_cast< storage_type >(desired), success_order, failure_order); |
| expected = !!old_value; |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_strong(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = static_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_weak(m_storage, old_value, static_cast< storage_type >(desired), success_order, failure_order); |
| expected = !!old_value; |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_weak(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool is_lock_free() const volatile BOOST_NOEXCEPT |
| { |
| return operations::is_lock_free(m_storage); |
| } |
| |
| BOOST_DELETED_FUNCTION(base_atomic(base_atomic const&)) |
| BOOST_DELETED_FUNCTION(base_atomic& operator=(base_atomic const&)) |
| }; |
| |
| |
| //! Implementation for user-defined types, such as structs and enums |
| template< typename T > |
| class base_atomic< T, void > |
| { |
| private: |
| typedef T value_type; |
| typedef atomics::detail::operations< storage_size_of< value_type >::value, false > operations; |
| |
| protected: |
| typedef value_type const& value_arg_type; |
| |
| public: |
| typedef typename operations::storage_type storage_type; |
| |
| protected: |
| storage_type m_storage; |
| |
| public: |
| BOOST_FORCEINLINE explicit base_atomic(value_type const& v = value_type()) BOOST_NOEXCEPT : m_storage(atomics::detail::memcpy_cast< storage_type >(v)) |
| { |
| } |
| |
| BOOST_FORCEINLINE void store(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_consume); |
| BOOST_ASSERT(order != memory_order_acquire); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| operations::store(m_storage, atomics::detail::memcpy_cast< storage_type >(v), order); |
| } |
| |
| BOOST_FORCEINLINE value_type load(memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_release); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| return atomics::detail::memcpy_cast< value_type >(operations::load(m_storage, order)); |
| } |
| |
| BOOST_FORCEINLINE value_type exchange(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::memcpy_cast< value_type >(operations::exchange(m_storage, atomics::detail::memcpy_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = atomics::detail::memcpy_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_strong(m_storage, old_value, atomics::detail::memcpy_cast< storage_type >(desired), success_order, failure_order); |
| expected = atomics::detail::memcpy_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_strong(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = atomics::detail::memcpy_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_weak(m_storage, old_value, atomics::detail::memcpy_cast< storage_type >(desired), success_order, failure_order); |
| expected = atomics::detail::memcpy_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_weak(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool is_lock_free() const volatile BOOST_NOEXCEPT |
| { |
| return operations::is_lock_free(m_storage); |
| } |
| |
| BOOST_DELETED_FUNCTION(base_atomic(base_atomic const&)) |
| BOOST_DELETED_FUNCTION(base_atomic& operator=(base_atomic const&)) |
| }; |
| |
| |
| //! Implementation for pointers |
| template< typename T > |
| class base_atomic< T*, void* > |
| { |
| private: |
| typedef T* value_type; |
| typedef std::ptrdiff_t difference_type; |
| typedef atomics::detail::operations< storage_size_of< value_type >::value, false > operations; |
| |
| protected: |
| typedef value_type value_arg_type; |
| |
| public: |
| typedef typename operations::storage_type storage_type; |
| |
| protected: |
| storage_type m_storage; |
| |
| public: |
| BOOST_DEFAULTED_FUNCTION(base_atomic(), {}) |
| BOOST_FORCEINLINE explicit base_atomic(value_type const& v) BOOST_NOEXCEPT : m_storage(atomics::detail::union_cast< storage_type >(v)) |
| { |
| } |
| |
| BOOST_FORCEINLINE void store(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_consume); |
| BOOST_ASSERT(order != memory_order_acquire); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| operations::store(m_storage, atomics::detail::union_cast< storage_type >(v), order); |
| } |
| |
| BOOST_FORCEINLINE value_type load(memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_release); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| return atomics::detail::union_cast< value_type >(operations::load(m_storage, order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_add(difference_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::union_cast< value_type >(operations::fetch_add(m_storage, static_cast< storage_type >(v * sizeof(T)), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_sub(difference_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::union_cast< value_type >(operations::fetch_sub(m_storage, static_cast< storage_type >(v * sizeof(T)), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type exchange(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::union_cast< value_type >(operations::exchange(m_storage, atomics::detail::union_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = atomics::detail::union_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_strong(m_storage, old_value, atomics::detail::union_cast< storage_type >(desired), success_order, failure_order); |
| expected = atomics::detail::union_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_strong(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = atomics::detail::union_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_weak(m_storage, old_value, atomics::detail::union_cast< storage_type >(desired), success_order, failure_order); |
| expected = atomics::detail::union_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_weak(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool is_lock_free() const volatile BOOST_NOEXCEPT |
| { |
| return operations::is_lock_free(m_storage); |
| } |
| |
| BOOST_FORCEINLINE value_type operator++(int) volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(1); |
| } |
| |
| BOOST_FORCEINLINE value_type operator++() volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(1) + 1; |
| } |
| |
| BOOST_FORCEINLINE value_type operator--(int) volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(1); |
| } |
| |
| BOOST_FORCEINLINE value_type operator--() volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(1) - 1; |
| } |
| |
| BOOST_FORCEINLINE value_type operator+=(difference_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(v) + v; |
| } |
| |
| BOOST_FORCEINLINE value_type operator-=(difference_type v) volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(v) - v; |
| } |
| |
| BOOST_DELETED_FUNCTION(base_atomic(base_atomic const&)) |
| BOOST_DELETED_FUNCTION(base_atomic& operator=(base_atomic const&)) |
| }; |
| |
| |
| //! Implementation for void pointers |
| template< > |
| class base_atomic< void*, void* > |
| { |
| private: |
| typedef void* value_type; |
| typedef std::ptrdiff_t difference_type; |
| typedef atomics::detail::operations< storage_size_of< value_type >::value, false > operations; |
| |
| protected: |
| typedef value_type value_arg_type; |
| |
| public: |
| typedef operations::storage_type storage_type; |
| |
| protected: |
| storage_type m_storage; |
| |
| public: |
| BOOST_DEFAULTED_FUNCTION(base_atomic(), {}) |
| BOOST_FORCEINLINE explicit base_atomic(value_type const& v) BOOST_NOEXCEPT : m_storage(atomics::detail::union_cast< storage_type >(v)) |
| { |
| } |
| |
| BOOST_FORCEINLINE void store(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_consume); |
| BOOST_ASSERT(order != memory_order_acquire); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| operations::store(m_storage, atomics::detail::union_cast< storage_type >(v), order); |
| } |
| |
| BOOST_FORCEINLINE value_type load(memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(order != memory_order_release); |
| BOOST_ASSERT(order != memory_order_acq_rel); |
| |
| return atomics::detail::union_cast< value_type >(operations::load(m_storage, order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_add(difference_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::union_cast< value_type >(operations::fetch_add(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type fetch_sub(difference_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::union_cast< value_type >(operations::fetch_sub(m_storage, static_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE value_type exchange(value_type v, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return atomics::detail::union_cast< value_type >(operations::exchange(m_storage, atomics::detail::union_cast< storage_type >(v), order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = atomics::detail::union_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_strong(m_storage, old_value, atomics::detail::union_cast< storage_type >(desired), success_order, failure_order); |
| expected = atomics::detail::union_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_strong(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_strong(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order success_order, memory_order failure_order) volatile BOOST_NOEXCEPT |
| { |
| BOOST_ASSERT(failure_order != memory_order_release); |
| BOOST_ASSERT(failure_order != memory_order_acq_rel); |
| BOOST_ASSERT(cas_failure_order_must_not_be_stronger_than_success_order(success_order, failure_order)); |
| |
| storage_type old_value = atomics::detail::union_cast< storage_type >(expected); |
| const bool res = operations::compare_exchange_weak(m_storage, old_value, atomics::detail::union_cast< storage_type >(desired), success_order, failure_order); |
| expected = atomics::detail::union_cast< value_type >(old_value); |
| return res; |
| } |
| |
| BOOST_FORCEINLINE bool compare_exchange_weak(value_type& expected, value_type desired, memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT |
| { |
| return compare_exchange_weak(expected, desired, order, atomics::detail::deduce_failure_order(order)); |
| } |
| |
| BOOST_FORCEINLINE bool is_lock_free() const volatile BOOST_NOEXCEPT |
| { |
| return operations::is_lock_free(m_storage); |
| } |
| |
| BOOST_FORCEINLINE value_type operator++(int) volatile BOOST_NOEXCEPT |
| { |
| return fetch_add(1); |
| } |
| |
| BOOST_FORCEINLINE value_type operator++() volatile BOOST_NOEXCEPT |
| { |
| return (char*)fetch_add(1) + 1; |
| } |
| |
| BOOST_FORCEINLINE value_type operator--(int) volatile BOOST_NOEXCEPT |
| { |
| return fetch_sub(1); |
| } |
| |
| BOOST_FORCEINLINE value_type operator--() volatile BOOST_NOEXCEPT |
| { |
| return (char*)fetch_sub(1) - 1; |
| } |
| |
| BOOST_FORCEINLINE value_type operator+=(difference_type v) volatile BOOST_NOEXCEPT |
| { |
| return (char*)fetch_add(v) + v; |
| } |
| |
| BOOST_FORCEINLINE value_type operator-=(difference_type v) volatile BOOST_NOEXCEPT |
| { |
| return (char*)fetch_sub(v) - v; |
| } |
| |
| BOOST_DELETED_FUNCTION(base_atomic(base_atomic const&)) |
| BOOST_DELETED_FUNCTION(base_atomic& operator=(base_atomic const&)) |
| }; |
| |
| } // namespace detail |
| |
| template< typename T > |
| class atomic : |
| public atomics::detail::base_atomic< T, typename atomics::detail::classify< T >::type > |
| { |
| private: |
| typedef T value_type; |
| typedef atomics::detail::base_atomic< T, typename atomics::detail::classify< T >::type > base_type; |
| typedef typename base_type::value_arg_type value_arg_type; |
| |
| public: |
| typedef typename base_type::storage_type storage_type; |
| |
| public: |
| BOOST_DEFAULTED_FUNCTION(atomic(), BOOST_NOEXCEPT {}) |
| |
| // NOTE: The constructor is made explicit because gcc 4.7 complains that |
| // operator=(value_arg_type) is considered ambiguous with operator=(atomic const&) |
| // in assignment expressions, even though conversion to atomic<> is less preferred |
| // than conversion to value_arg_type. |
| BOOST_FORCEINLINE explicit BOOST_CONSTEXPR atomic(value_arg_type v) BOOST_NOEXCEPT : base_type(v) {} |
| |
| BOOST_FORCEINLINE value_type operator= (value_arg_type v) volatile BOOST_NOEXCEPT |
| { |
| this->store(v); |
| return v; |
| } |
| |
| BOOST_FORCEINLINE operator value_type() volatile const BOOST_NOEXCEPT |
| { |
| return this->load(); |
| } |
| |
| BOOST_FORCEINLINE storage_type& storage() BOOST_NOEXCEPT { return this->m_storage; } |
| BOOST_FORCEINLINE storage_type volatile& storage() volatile BOOST_NOEXCEPT { return this->m_storage; } |
| BOOST_FORCEINLINE storage_type const& storage() const BOOST_NOEXCEPT { return this->m_storage; } |
| BOOST_FORCEINLINE storage_type const volatile& storage() const volatile BOOST_NOEXCEPT { return this->m_storage; } |
| |
| BOOST_DELETED_FUNCTION(atomic(atomic const&)) |
| BOOST_DELETED_FUNCTION(atomic& operator= (atomic const&)) |
| BOOST_DELETED_FUNCTION(atomic& operator= (atomic const&) volatile) |
| }; |
| |
| typedef atomic< char > atomic_char; |
| typedef atomic< unsigned char > atomic_uchar; |
| typedef atomic< signed char > atomic_schar; |
| typedef atomic< uint8_t > atomic_uint8_t; |
| typedef atomic< int8_t > atomic_int8_t; |
| typedef atomic< unsigned short > atomic_ushort; |
| typedef atomic< short > atomic_short; |
| typedef atomic< uint16_t > atomic_uint16_t; |
| typedef atomic< int16_t > atomic_int16_t; |
| typedef atomic< unsigned int > atomic_uint; |
| typedef atomic< int > atomic_int; |
| typedef atomic< uint32_t > atomic_uint32_t; |
| typedef atomic< int32_t > atomic_int32_t; |
| typedef atomic< unsigned long > atomic_ulong; |
| typedef atomic< long > atomic_long; |
| typedef atomic< uint64_t > atomic_uint64_t; |
| typedef atomic< int64_t > atomic_int64_t; |
| #ifdef BOOST_HAS_LONG_LONG |
| typedef atomic< boost::ulong_long_type > atomic_ullong; |
| typedef atomic< boost::long_long_type > atomic_llong; |
| #endif |
| typedef atomic< void* > atomic_address; |
| typedef atomic< bool > atomic_bool; |
| typedef atomic< wchar_t > atomic_wchar_t; |
| #if !defined(BOOST_NO_CXX11_CHAR16_T) |
| typedef atomic< char16_t > atomic_char16_t; |
| #endif |
| #if !defined(BOOST_NO_CXX11_CHAR32_T) |
| typedef atomic< char32_t > atomic_char32_t; |
| #endif |
| |
| typedef atomic< int_least8_t > atomic_int_least8_t; |
| typedef atomic< uint_least8_t > atomic_uint_least8_t; |
| typedef atomic< int_least16_t > atomic_int_least16_t; |
| typedef atomic< uint_least16_t > atomic_uint_least16_t; |
| typedef atomic< int_least32_t > atomic_int_least32_t; |
| typedef atomic< uint_least32_t > atomic_uint_least32_t; |
| typedef atomic< int_least64_t > atomic_int_least64_t; |
| typedef atomic< uint_least64_t > atomic_uint_least64_t; |
| typedef atomic< int_fast8_t > atomic_int_fast8_t; |
| typedef atomic< uint_fast8_t > atomic_uint_fast8_t; |
| typedef atomic< int_fast16_t > atomic_int_fast16_t; |
| typedef atomic< uint_fast16_t > atomic_uint_fast16_t; |
| typedef atomic< int_fast32_t > atomic_int_fast32_t; |
| typedef atomic< uint_fast32_t > atomic_uint_fast32_t; |
| typedef atomic< int_fast64_t > atomic_int_fast64_t; |
| typedef atomic< uint_fast64_t > atomic_uint_fast64_t; |
| typedef atomic< intmax_t > atomic_intmax_t; |
| typedef atomic< uintmax_t > atomic_uintmax_t; |
| |
| typedef atomic< std::size_t > atomic_size_t; |
| typedef atomic< std::ptrdiff_t > atomic_ptrdiff_t; |
| |
| #if defined(BOOST_HAS_INTPTR_T) |
| typedef atomic< intptr_t > atomic_intptr_t; |
| typedef atomic< uintptr_t > atomic_uintptr_t; |
| #endif |
| |
| } // namespace atomics |
| } // namespace boost |
| |
| #if defined(BOOST_MSVC) |
| #pragma warning(pop) |
| #endif |
| |
| #endif // BOOST_ATOMIC_DETAIL_ATOMIC_TEMPLATE_HPP_INCLUDED_ |