// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_BASE_ATOMICOPS_INTERNALS_STD_H_
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#define V8_BASE_ATOMICOPS_INTERNALS_STD_H_
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#include <atomic>
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#include "src/base/build_config.h"
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#include "src/base/macros.h"
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namespace v8 {
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namespace base {
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namespace helper {
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template <typename T>
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volatile std::atomic<T>* to_std_atomic(volatile T* ptr) {
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return reinterpret_cast<volatile std::atomic<T>*>(ptr);
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}
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template <typename T>
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volatile const std::atomic<T>* to_std_atomic_const(volatile const T* ptr) {
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return reinterpret_cast<volatile const std::atomic<T>*>(ptr);
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}
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} // namespace helper
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inline void SeqCst_MemoryFence() {
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std::atomic_thread_fence(std::memory_order_seq_cst);
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}
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inline Atomic32 Relaxed_CompareAndSwap(volatile Atomic32* ptr,
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Atomic32 old_value, Atomic32 new_value) {
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std::atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_relaxed, std::memory_order_relaxed);
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return old_value;
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}
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inline Atomic32 Relaxed_AtomicExchange(volatile Atomic32* ptr,
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Atomic32 new_value) {
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return std::atomic_exchange_explicit(helper::to_std_atomic(ptr), new_value,
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std::memory_order_relaxed);
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}
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inline Atomic32 Relaxed_AtomicIncrement(volatile Atomic32* ptr,
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Atomic32 increment) {
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return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
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increment,
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std::memory_order_relaxed);
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}
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inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
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Atomic32 increment) {
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return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
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increment,
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std::memory_order_seq_cst);
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}
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inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
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Atomic32 old_value, Atomic32 new_value) {
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atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_acquire, std::memory_order_acquire);
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return old_value;
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}
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inline Atomic8 Release_CompareAndSwap(volatile Atomic8* ptr, Atomic8 old_value,
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Atomic8 new_value) {
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bool result = atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_release, std::memory_order_relaxed);
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USE(result); // Make gcc compiler happy.
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return old_value;
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}
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inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
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Atomic32 old_value, Atomic32 new_value) {
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atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_release, std::memory_order_relaxed);
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return old_value;
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}
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inline void Relaxed_Store(volatile Atomic8* ptr, Atomic8 value) {
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std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
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std::memory_order_relaxed);
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}
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inline void Relaxed_Store(volatile Atomic32* ptr, Atomic32 value) {
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std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
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std::memory_order_relaxed);
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}
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inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
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std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
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std::memory_order_release);
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}
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inline Atomic8 Relaxed_Load(volatile const Atomic8* ptr) {
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return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
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std::memory_order_relaxed);
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}
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inline Atomic32 Relaxed_Load(volatile const Atomic32* ptr) {
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return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
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std::memory_order_relaxed);
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}
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inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
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return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
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std::memory_order_acquire);
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}
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#if defined(V8_HOST_ARCH_64_BIT)
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inline Atomic64 Relaxed_CompareAndSwap(volatile Atomic64* ptr,
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Atomic64 old_value, Atomic64 new_value) {
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std::atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_relaxed, std::memory_order_relaxed);
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return old_value;
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}
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inline Atomic64 Relaxed_AtomicExchange(volatile Atomic64* ptr,
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Atomic64 new_value) {
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return std::atomic_exchange_explicit(helper::to_std_atomic(ptr), new_value,
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std::memory_order_relaxed);
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}
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inline Atomic64 Relaxed_AtomicIncrement(volatile Atomic64* ptr,
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Atomic64 increment) {
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return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
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increment,
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std::memory_order_relaxed);
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}
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inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
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Atomic64 increment) {
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return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
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increment,
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std::memory_order_seq_cst);
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}
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inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
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Atomic64 old_value, Atomic64 new_value) {
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std::atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_acquire, std::memory_order_acquire);
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return old_value;
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}
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inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
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Atomic64 old_value, Atomic64 new_value) {
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std::atomic_compare_exchange_strong_explicit(
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helper::to_std_atomic(ptr), &old_value, new_value,
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std::memory_order_release, std::memory_order_relaxed);
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return old_value;
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}
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inline void Relaxed_Store(volatile Atomic64* ptr, Atomic64 value) {
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std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
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std::memory_order_relaxed);
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}
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inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
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std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
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std::memory_order_release);
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}
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inline Atomic64 Relaxed_Load(volatile const Atomic64* ptr) {
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return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
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std::memory_order_relaxed);
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}
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inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
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return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
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std::memory_order_acquire);
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}
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#endif // defined(V8_HOST_ARCH_64_BIT)
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} // namespace base
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} // namespace v8
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#endif // V8_BASE_ATOMICOPS_INTERNALS_STD_H_
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