1// Copyright 2014 the V8 project authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// This file is an internal atomic implementation, use atomicops.h instead. 6 7#ifndef V8_BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 8#define V8_BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 9 10// AtomicWord is a synonym for intptr_t, and Atomic32 is a synonym for int32, 11// which in turn means int. On some LP32 platforms, intptr_t is an int, but 12// on others, it's a long. When AtomicWord and Atomic32 are based on different 13// fundamental types, their pointers are incompatible. 14// 15// This file defines function overloads to allow both AtomicWord and Atomic32 16// data to be used with this interface. 17// 18// On LP64 platforms, AtomicWord and Atomic64 are both always long, 19// so this problem doesn't occur. 20 21#if !defined(V8_HOST_ARCH_64_BIT) 22 23namespace v8 { 24namespace base { 25 26inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr, 27 AtomicWord old_value, 28 AtomicWord new_value) { 29 return NoBarrier_CompareAndSwap( 30 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 31} 32 33inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr, 34 AtomicWord new_value) { 35 return NoBarrier_AtomicExchange( 36 reinterpret_cast<volatile Atomic32*>(ptr), new_value); 37} 38 39inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr, 40 AtomicWord increment) { 41 return NoBarrier_AtomicIncrement( 42 reinterpret_cast<volatile Atomic32*>(ptr), increment); 43} 44 45inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr, 46 AtomicWord increment) { 47 return Barrier_AtomicIncrement( 48 reinterpret_cast<volatile Atomic32*>(ptr), increment); 49} 50 51inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr, 52 AtomicWord old_value, 53 AtomicWord new_value) { 54 return v8::base::Acquire_CompareAndSwap( 55 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 56} 57 58inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr, 59 AtomicWord old_value, 60 AtomicWord new_value) { 61 return v8::base::Release_CompareAndSwap( 62 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 63} 64 65inline void NoBarrier_Store(volatile AtomicWord *ptr, AtomicWord value) { 66 NoBarrier_Store( 67 reinterpret_cast<volatile Atomic32*>(ptr), value); 68} 69 70inline void Acquire_Store(volatile AtomicWord* ptr, AtomicWord value) { 71 return v8::base::Acquire_Store( 72 reinterpret_cast<volatile Atomic32*>(ptr), value); 73} 74 75inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) { 76 return v8::base::Release_Store( 77 reinterpret_cast<volatile Atomic32*>(ptr), value); 78} 79 80inline AtomicWord NoBarrier_Load(volatile const AtomicWord *ptr) { 81 return NoBarrier_Load( 82 reinterpret_cast<volatile const Atomic32*>(ptr)); 83} 84 85inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) { 86 return v8::base::Acquire_Load( 87 reinterpret_cast<volatile const Atomic32*>(ptr)); 88} 89 90inline AtomicWord Release_Load(volatile const AtomicWord* ptr) { 91 return v8::base::Release_Load( 92 reinterpret_cast<volatile const Atomic32*>(ptr)); 93} 94 95} } // namespace v8::base 96 97#endif // !defined(V8_HOST_ARCH_64_BIT) 98 99#endif // V8_BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 100