1// Protocol Buffers - Google's data interchange format 2// Copyright 2012 Google Inc. All rights reserved. 3// http://code.google.com/p/protobuf/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31// This file is an internal atomic implementation, use atomicops.h instead. 32 33#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 34#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 35 36// AtomicWord is a synonym for intptr_t, and Atomic32 is a synonym for int32, 37// which in turn means int. On some LP32 platforms, intptr_t is an int, but 38// on others, it's a long. When AtomicWord and Atomic32 are based on different 39// fundamental types, their pointers are incompatible. 40// 41// This file defines function overloads to allow both AtomicWord and Atomic32 42// data to be used with this interface. 43// 44// On LP64 platforms, AtomicWord and Atomic64 are both always long, 45// so this problem doesn't occur. 46 47#if !defined(GOOGLE_PROTOBUF_ARCH_64_BIT) 48 49namespace google { 50namespace protobuf { 51namespace internal { 52 53inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr, 54 AtomicWord old_value, 55 AtomicWord new_value) { 56 return NoBarrier_CompareAndSwap( 57 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 58} 59 60inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr, 61 AtomicWord new_value) { 62 return NoBarrier_AtomicExchange( 63 reinterpret_cast<volatile Atomic32*>(ptr), new_value); 64} 65 66inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr, 67 AtomicWord increment) { 68 return NoBarrier_AtomicIncrement( 69 reinterpret_cast<volatile Atomic32*>(ptr), increment); 70} 71 72inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr, 73 AtomicWord increment) { 74 return Barrier_AtomicIncrement( 75 reinterpret_cast<volatile Atomic32*>(ptr), increment); 76} 77 78inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr, 79 AtomicWord old_value, 80 AtomicWord new_value) { 81 return Acquire_CompareAndSwap( 82 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 83} 84 85inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr, 86 AtomicWord old_value, 87 AtomicWord new_value) { 88 return Release_CompareAndSwap( 89 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 90} 91 92inline void NoBarrier_Store(volatile AtomicWord *ptr, AtomicWord value) { 93 NoBarrier_Store(reinterpret_cast<volatile Atomic32*>(ptr), value); 94} 95 96inline void Acquire_Store(volatile AtomicWord* ptr, AtomicWord value) { 97 return Acquire_Store(reinterpret_cast<volatile Atomic32*>(ptr), value); 98} 99 100inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) { 101 return Release_Store(reinterpret_cast<volatile Atomic32*>(ptr), value); 102} 103 104inline AtomicWord NoBarrier_Load(volatile const AtomicWord *ptr) { 105 return NoBarrier_Load(reinterpret_cast<volatile const Atomic32*>(ptr)); 106} 107 108inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) { 109 return Acquire_Load(reinterpret_cast<volatile const Atomic32*>(ptr)); 110} 111 112inline AtomicWord Release_Load(volatile const AtomicWord* ptr) { 113 return Release_Load(reinterpret_cast<volatile const Atomic32*>(ptr)); 114} 115 116} // namespace internal 117} // namespace protobuf 118} // namespace google 119 120#endif // !defined(GOOGLE_PROTOBUF_ARCH_64_BIT) 121 122#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 123