| /* |
| * 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_ops_gcc_atomic.hpp |
| * |
| * This header contains implementation of the \c core_operations template. |
| */ |
| |
| #ifndef BOOST_ATOMIC_DETAIL_CORE_OPS_GCC_ATOMIC_HPP_INCLUDED_ |
| #define BOOST_ATOMIC_DETAIL_CORE_OPS_GCC_ATOMIC_HPP_INCLUDED_ |
| |
| #include <cstddef> |
| #include <boost/memory_order.hpp> |
| #include <boost/atomic/detail/config.hpp> |
| #include <boost/atomic/detail/storage_traits.hpp> |
| #include <boost/atomic/detail/core_operations_fwd.hpp> |
| #include <boost/atomic/detail/core_arch_operations.hpp> |
| #include <boost/atomic/detail/capabilities.hpp> |
| #include <boost/atomic/detail/gcc_atomic_memory_order_utils.hpp> |
| |
| #if BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT8_LOCK_FREE < BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT16_LOCK_FREE || BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT16_LOCK_FREE < BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT32_LOCK_FREE ||\ |
| BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT32_LOCK_FREE < BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT64_LOCK_FREE || BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT64_LOCK_FREE < BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT128_LOCK_FREE |
| // There are platforms where we need to use larger storage types |
| #include <boost/atomic/detail/int_sizes.hpp> |
| #include <boost/atomic/detail/extending_cas_based_arithmetic.hpp> |
| #endif |
| #include <boost/atomic/detail/header.hpp> |
| |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| #pragma once |
| #endif |
| |
| #if defined(__INTEL_COMPILER) |
| // This is used to suppress warning #32013 described in gcc_atomic_memory_order_utils.hpp |
| // 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 { |
| |
| template< std::size_t Size, bool Signed, bool Interprocess > |
| struct core_operations_gcc_atomic |
| { |
| typedef typename storage_traits< Size >::type storage_type; |
| |
| static BOOST_CONSTEXPR_OR_CONST std::size_t storage_size = Size; |
| static BOOST_CONSTEXPR_OR_CONST std::size_t storage_alignment = storage_traits< Size >::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; |
| |
| // Note: In the current implementation, core_operations_gcc_atomic are used only when the particularly sized __atomic |
| // intrinsics are always lock-free (i.e. the corresponding LOCK_FREE macro is 2). Therefore it is safe to |
| // always set is_always_lock_free to true here. |
| static BOOST_CONSTEXPR_OR_CONST bool is_always_lock_free = true; |
| |
| static BOOST_FORCEINLINE void store(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT |
| { |
| #if defined(BOOST_GCC) && BOOST_GCC < 100100 && (defined(__x86_64__) || defined(__i386__)) |
| // gcc up to 10.1 generates mov + mfence for seq_cst stores, which is slower than xchg |
| if (order != memory_order_seq_cst) |
| __atomic_store_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order)); |
| else |
| __atomic_exchange_n(&storage, v, __ATOMIC_SEQ_CST); |
| #else |
| __atomic_store_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order)); |
| #endif |
| } |
| |
| static BOOST_FORCEINLINE storage_type load(storage_type const volatile& storage, memory_order order) BOOST_NOEXCEPT |
| { |
| #if defined(BOOST_ATOMIC_DETAIL_AARCH64_HAS_RCPC) |
| // At least gcc 9.3 and clang 10 do not generate relaxed ldapr instructions that are available in ARMv8.3-RCPC extension. |
| // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95751 |
| typedef atomics::detail::core_arch_operations< storage_size, is_signed, is_interprocess > core_arch_operations; |
| return core_arch_operations::load(storage, order); |
| #else |
| return __atomic_load_n(&storage, atomics::detail::convert_memory_order_to_gcc(order)); |
| #endif |
| } |
| |
| 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)); |
| } |
| }; |
| |
| // We want to only enable __atomic* intrinsics when the corresponding BOOST_ATOMIC_DETAIL_GCC_ATOMIC_*_LOCK_FREE macro indicates |
| // the same or better lock-free guarantees as the BOOST_ATOMIC_*_LOCK_FREE macro. Otherwise, we want to leave core_operations |
| // unspecialized, so that core_arch_operations is used instead. |
| |
| #if BOOST_ATOMIC_INT128_LOCK_FREE > 0 && BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT128_LOCK_FREE >= BOOST_ATOMIC_INT128_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 16u, Signed, Interprocess > : |
| public core_operations_gcc_atomic< 16u, Signed, Interprocess > |
| { |
| }; |
| |
| #endif |
| |
| #if BOOST_ATOMIC_INT64_LOCK_FREE > 0 |
| #if BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT64_LOCK_FREE >= BOOST_ATOMIC_INT64_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 8u, Signed, Interprocess > : |
| public core_operations_gcc_atomic< 8u, Signed, Interprocess > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT128_LOCK_FREE >= BOOST_ATOMIC_INT64_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 8u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 16u, Signed, Interprocess >, 8u, Signed > |
| { |
| }; |
| |
| #endif |
| #endif // BOOST_ATOMIC_INT64_LOCK_FREE > 0 |
| |
| |
| #if BOOST_ATOMIC_INT32_LOCK_FREE > 0 |
| #if BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT32_LOCK_FREE >= BOOST_ATOMIC_INT32_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 4u, Signed, Interprocess > : |
| public core_operations_gcc_atomic< 4u, Signed, Interprocess > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT64_LOCK_FREE >= BOOST_ATOMIC_INT32_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 4u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 8u, Signed, Interprocess >, 4u, Signed > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT128_LOCK_FREE >= BOOST_ATOMIC_INT32_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 8u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 16u, Signed, Interprocess >, 4u, Signed > |
| { |
| }; |
| |
| #endif |
| #endif // BOOST_ATOMIC_INT32_LOCK_FREE > 0 |
| |
| |
| #if BOOST_ATOMIC_INT16_LOCK_FREE > 0 |
| #if BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT16_LOCK_FREE >= BOOST_ATOMIC_INT16_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 2u, Signed, Interprocess > : |
| public core_operations_gcc_atomic< 2u, Signed, Interprocess > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT32_LOCK_FREE >= BOOST_ATOMIC_INT16_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 2u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 4u, Signed, Interprocess >, 2u, Signed > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT64_LOCK_FREE >= BOOST_ATOMIC_INT16_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 2u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 8u, Signed, Interprocess >, 2u, Signed > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT128_LOCK_FREE >= BOOST_ATOMIC_INT16_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 2u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 16u, Signed, Interprocess >, 2u, Signed > |
| { |
| }; |
| |
| #endif |
| #endif // BOOST_ATOMIC_INT16_LOCK_FREE > 0 |
| |
| |
| #if BOOST_ATOMIC_INT8_LOCK_FREE > 0 |
| #if BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT8_LOCK_FREE >= BOOST_ATOMIC_INT8_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 1u, Signed, Interprocess > : |
| public core_operations_gcc_atomic< 1u, Signed, Interprocess > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT16_LOCK_FREE >= BOOST_ATOMIC_INT8_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 1u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 2u, Signed, Interprocess >, 1u, Signed > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT32_LOCK_FREE >= BOOST_ATOMIC_INT8_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 1u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 4u, Signed, Interprocess >, 1u, Signed > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT64_LOCK_FREE >= BOOST_ATOMIC_INT8_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 1u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 8u, Signed, Interprocess >, 1u, Signed > |
| { |
| }; |
| |
| #elif BOOST_ATOMIC_DETAIL_GCC_ATOMIC_INT128_LOCK_FREE >= BOOST_ATOMIC_INT8_LOCK_FREE |
| |
| template< bool Signed, bool Interprocess > |
| struct core_operations< 1u, Signed, Interprocess > : |
| public extending_cas_based_arithmetic< core_operations_gcc_atomic< 16u, Signed, Interprocess >, 1u, Signed > |
| { |
| }; |
| |
| #endif |
| #endif // BOOST_ATOMIC_INT8_LOCK_FREE > 0 |
| |
| } // namespace detail |
| } // namespace atomics |
| } // namespace boost |
| |
| #include <boost/atomic/detail/footer.hpp> |
| |
| #endif // BOOST_ATOMIC_DETAIL_CORE_OPS_GCC_ATOMIC_HPP_INCLUDED_ |