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