| // Copyright 2012 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. |
| |
| // This file is an internal atomic implementation, use atomicops.h instead. |
| |
| #ifndef V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_ |
| #define V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_ |
| |
| namespace v8 { |
| namespace base { |
| |
| inline void MemoryBarrier() { __sync_synchronize(); } |
| |
| inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, |
| Atomic32 new_value) { |
| return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| } |
| |
| inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, |
| Atomic32 new_value) { |
| return __sync_lock_test_and_set(ptr, new_value); |
| } |
| |
| inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, |
| Atomic32 increment) { |
| return __sync_add_and_fetch(ptr, increment); |
| } |
| |
| inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
| Atomic32 increment) { |
| return __sync_add_and_fetch(ptr, increment); |
| } |
| |
| inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, Atomic32 new_value) { |
| return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| } |
| |
| inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, Atomic32 new_value) { |
| return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic8* ptr, Atomic8 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline Atomic8 NoBarrier_Load(volatile const Atomic8* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| |
| inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| |
| inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| |
| inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| |
| // 64-bit versions of the operations. |
| // See the 32-bit versions for comments. |
| |
| inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, |
| Atomic64 new_value) { |
| return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| } |
| |
| inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, |
| Atomic64 new_value) { |
| return __sync_lock_test_and_set(ptr, new_value); |
| } |
| |
| inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, |
| Atomic64 increment) { |
| return __sync_add_and_fetch(ptr, increment); |
| } |
| |
| inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, |
| Atomic64 increment) { |
| return __sync_add_and_fetch(ptr, increment); |
| } |
| |
| inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, Atomic64 new_value) { |
| return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| } |
| |
| inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, Atomic64 new_value) { |
| return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { |
| __sync_lock_test_and_set(ptr, value); |
| } |
| |
| inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| |
| inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| |
| inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
| return __sync_add_and_fetch(ptr, 0); |
| } |
| } // namespace base |
| } // namespace v8 |
| |
| #endif // V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_ |