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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_BASE_ATOMICOPS_INTERNALS_STD_H_
#define V8_BASE_ATOMICOPS_INTERNALS_STD_H_
#include <atomic>
#include "src/base/build_config.h"
#include "src/base/macros.h"
namespace v8 {
namespace base {
namespace helper {
template <typename T>
volatile std::atomic<T>* to_std_atomic(volatile T* ptr) {
return reinterpret_cast<volatile std::atomic<T>*>(ptr);
}
template <typename T>
volatile const std::atomic<T>* to_std_atomic_const(volatile const T* ptr) {
return reinterpret_cast<volatile const std::atomic<T>*>(ptr);
}
} // namespace helper
inline void SeqCst_MemoryFence() {
std::atomic_thread_fence(std::memory_order_seq_cst);
}
inline Atomic16 Relaxed_CompareAndSwap(volatile Atomic16* ptr,
Atomic16 old_value, Atomic16 new_value) {
std::atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_relaxed, std::memory_order_relaxed);
return old_value;
}
inline Atomic32 Relaxed_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value, Atomic32 new_value) {
std::atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_relaxed, std::memory_order_relaxed);
return old_value;
}
inline Atomic32 Relaxed_AtomicExchange(volatile Atomic32* ptr,
Atomic32 new_value) {
return std::atomic_exchange_explicit(helper::to_std_atomic(ptr), new_value,
std::memory_order_relaxed);
}
inline Atomic32 Relaxed_AtomicIncrement(volatile Atomic32* ptr,
Atomic32 increment) {
return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
increment,
std::memory_order_relaxed);
}
inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
Atomic32 increment) {
return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
increment,
std::memory_order_seq_cst);
}
inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value, Atomic32 new_value) {
atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_acquire, std::memory_order_acquire);
return old_value;
}
inline Atomic8 Release_CompareAndSwap(volatile Atomic8* ptr, Atomic8 old_value,
Atomic8 new_value) {
bool result = atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_release, std::memory_order_relaxed);
USE(result); // Make gcc compiler happy.
return old_value;
}
inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value, Atomic32 new_value) {
atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_release, std::memory_order_relaxed);
return old_value;
}
inline void Relaxed_Store(volatile Atomic8* ptr, Atomic8 value) {
std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
std::memory_order_relaxed);
}
inline void Relaxed_Store(volatile Atomic16* ptr, Atomic16 value) {
std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
std::memory_order_relaxed);
}
inline void Relaxed_Store(volatile Atomic32* ptr, Atomic32 value) {
std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
std::memory_order_relaxed);
}
inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
std::memory_order_release);
}
inline Atomic8 Relaxed_Load(volatile const Atomic8* ptr) {
return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
std::memory_order_relaxed);
}
inline Atomic16 Relaxed_Load(volatile const Atomic16* ptr) {
return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
std::memory_order_relaxed);
}
inline Atomic32 Relaxed_Load(volatile const Atomic32* ptr) {
return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
std::memory_order_relaxed);
}
inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
std::memory_order_acquire);
}
#if defined(V8_HOST_ARCH_64_BIT)
inline Atomic64 Relaxed_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value, Atomic64 new_value) {
std::atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_relaxed, std::memory_order_relaxed);
return old_value;
}
inline Atomic64 Relaxed_AtomicExchange(volatile Atomic64* ptr,
Atomic64 new_value) {
return std::atomic_exchange_explicit(helper::to_std_atomic(ptr), new_value,
std::memory_order_relaxed);
}
inline Atomic64 Relaxed_AtomicIncrement(volatile Atomic64* ptr,
Atomic64 increment) {
return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
increment,
std::memory_order_relaxed);
}
inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
Atomic64 increment) {
return increment + std::atomic_fetch_add_explicit(helper::to_std_atomic(ptr),
increment,
std::memory_order_seq_cst);
}
inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value, Atomic64 new_value) {
std::atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_acquire, std::memory_order_acquire);
return old_value;
}
inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value, Atomic64 new_value) {
std::atomic_compare_exchange_strong_explicit(
helper::to_std_atomic(ptr), &old_value, new_value,
std::memory_order_release, std::memory_order_relaxed);
return old_value;
}
inline void Relaxed_Store(volatile Atomic64* ptr, Atomic64 value) {
std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
std::memory_order_relaxed);
}
inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
std::atomic_store_explicit(helper::to_std_atomic(ptr), value,
std::memory_order_release);
}
inline Atomic64 Relaxed_Load(volatile const Atomic64* ptr) {
return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
std::memory_order_relaxed);
}
inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
return std::atomic_load_explicit(helper::to_std_atomic_const(ptr),
std::memory_order_acquire);
}
#endif // defined(V8_HOST_ARCH_64_BIT)
} // namespace base
} // namespace v8
#endif // V8_BASE_ATOMICOPS_INTERNALS_STD_H_
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