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- // Copyright (c) 2011 The Chromium 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 base/atomicops.h instead.
- #ifndef BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_
- #define BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_
- #include <stdint.h>
- #include "build/build_config.h"
- // AtomicWord is a synonym for intptr_t, and Atomic32 is a synonym for int32_t,
- // which in turn means int. On some LP32 platforms, intptr_t is an int, but
- // on others, it's a long. When AtomicWord and Atomic32 are based on different
- // fundamental types, their pointers are incompatible.
- //
- // This file defines function overloads to allow both AtomicWord and Atomic32
- // data to be used with this interface.
- //
- // On LP64 platforms, AtomicWord and Atomic64 are both always long,
- // so this problem doesn't occur.
- #if !defined(ARCH_CPU_64_BITS)
- namespace base {
- namespace subtle {
- inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr,
- AtomicWord old_value,
- AtomicWord new_value) {
- return NoBarrier_CompareAndSwap(
- reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value);
- }
- inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr,
- AtomicWord new_value) {
- return NoBarrier_AtomicExchange(
- reinterpret_cast<volatile Atomic32*>(ptr), new_value);
- }
- inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr,
- AtomicWord increment) {
- return NoBarrier_AtomicIncrement(
- reinterpret_cast<volatile Atomic32*>(ptr), increment);
- }
- inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr,
- AtomicWord increment) {
- return Barrier_AtomicIncrement(
- reinterpret_cast<volatile Atomic32*>(ptr), increment);
- }
- inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr,
- AtomicWord old_value,
- AtomicWord new_value) {
- return base::subtle::Acquire_CompareAndSwap(
- reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value);
- }
- inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr,
- AtomicWord old_value,
- AtomicWord new_value) {
- return base::subtle::Release_CompareAndSwap(
- reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value);
- }
- inline void NoBarrier_Store(volatile AtomicWord *ptr, AtomicWord value) {
- NoBarrier_Store(
- reinterpret_cast<volatile Atomic32*>(ptr), value);
- }
- inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) {
- return base::subtle::Release_Store(
- reinterpret_cast<volatile Atomic32*>(ptr), value);
- }
- inline AtomicWord NoBarrier_Load(volatile const AtomicWord *ptr) {
- return NoBarrier_Load(
- reinterpret_cast<volatile const Atomic32*>(ptr));
- }
- inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) {
- return base::subtle::Acquire_Load(
- reinterpret_cast<volatile const Atomic32*>(ptr));
- }
- } // namespace subtle
- } // namespace base
- #endif // !defined(ARCH_CPU_64_BITS)
- #endif // BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_
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