1// Protocol Buffers - Google's data interchange format 2// Copyright 2012 Google Inc. All rights reserved. 3// https://developers.google.com/protocol-buffers/ 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_PNACL_H_ 34#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_ 35 36namespace google { 37namespace protobuf { 38namespace internal { 39 40inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, 41 Atomic32 old_value, 42 Atomic32 new_value) { 43 return __sync_val_compare_and_swap(ptr, old_value, new_value); 44} 45 46inline void MemoryBarrier() { 47 __sync_synchronize(); 48} 49 50inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, 51 Atomic32 old_value, 52 Atomic32 new_value) { 53 Atomic32 ret = NoBarrier_CompareAndSwap(ptr, old_value, new_value); 54 MemoryBarrier(); 55 return ret; 56} 57 58inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { 59 MemoryBarrier(); 60 *ptr = value; 61} 62 63inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { 64 Atomic32 value = *ptr; 65 MemoryBarrier(); 66 return value; 67} 68 69} // namespace internal 70} // namespace protobuf 71} // namespace google 72 73#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_ 74