127 lines
5.1 KiB
C++
127 lines
5.1 KiB
C++
// Copyright (c) 2011 Google Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Do not include this header file directly. Use base/cef_atomicops.h
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// instead.
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#ifndef CEF_INCLUDE_BASE_INTERNAL_CEF_ATOMICOPS_ATOMICWORD_COMPAT_H_
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#define CEF_INCLUDE_BASE_INTERNAL_CEF_ATOMICOPS_ATOMICWORD_COMPAT_H_
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// AtomicWord is a synonym for intptr_t, and Atomic32 is a synonym for int32,
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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 base::subtle
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} // namespace base
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#endif // !defined(ARCH_CPU_64_BITS)
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#endif // CEF_INCLUDE_BASE_INTERNAL_CEF_ATOMICOPS_ATOMICWORD_COMPAT_H_
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