1// Protocol Buffers - Google's data interchange format 2// Copyright 2013 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 for compiler-based 32// ThreadSanitizer (http://clang.llvm.org/docs/ThreadSanitizer.html). 33// Use atomicops.h instead. 34 35#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_TSAN_H_ 36#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_TSAN_H_ 37 38#define ATOMICOPS_COMPILER_BARRIER() __asm__ __volatile__("" : : : "memory") 39 40#include <sanitizer/tsan_interface_atomic.h> 41 42namespace google { 43namespace protobuf { 44namespace internal { 45 46inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32 *ptr, 47 Atomic32 old_value, 48 Atomic32 new_value) { 49 Atomic32 cmp = old_value; 50 __tsan_atomic32_compare_exchange_strong(ptr, &cmp, new_value, 51 __tsan_memory_order_relaxed, __tsan_memory_order_relaxed); 52 return cmp; 53} 54 55inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32 *ptr, 56 Atomic32 new_value) { 57 return __tsan_atomic32_exchange(ptr, new_value, 58 __tsan_memory_order_relaxed); 59} 60 61inline Atomic32 Acquire_AtomicExchange(volatile Atomic32 *ptr, 62 Atomic32 new_value) { 63 return __tsan_atomic32_exchange(ptr, new_value, 64 __tsan_memory_order_acquire); 65} 66 67inline Atomic32 Release_AtomicExchange(volatile Atomic32 *ptr, 68 Atomic32 new_value) { 69 return __tsan_atomic32_exchange(ptr, new_value, 70 __tsan_memory_order_release); 71} 72 73inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32 *ptr, 74 Atomic32 increment) { 75 return increment + __tsan_atomic32_fetch_add(ptr, increment, 76 __tsan_memory_order_relaxed); 77} 78 79inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32 *ptr, 80 Atomic32 increment) { 81 return increment + __tsan_atomic32_fetch_add(ptr, increment, 82 __tsan_memory_order_acq_rel); 83} 84 85inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32 *ptr, 86 Atomic32 old_value, 87 Atomic32 new_value) { 88 Atomic32 cmp = old_value; 89 __tsan_atomic32_compare_exchange_strong(ptr, &cmp, new_value, 90 __tsan_memory_order_acquire, __tsan_memory_order_acquire); 91 return cmp; 92} 93 94inline Atomic32 Release_CompareAndSwap(volatile Atomic32 *ptr, 95 Atomic32 old_value, 96 Atomic32 new_value) { 97 Atomic32 cmp = old_value; 98 __tsan_atomic32_compare_exchange_strong(ptr, &cmp, new_value, 99 __tsan_memory_order_release, __tsan_memory_order_relaxed); 100 return cmp; 101} 102 103inline void NoBarrier_Store(volatile Atomic32 *ptr, Atomic32 value) { 104 __tsan_atomic32_store(ptr, value, __tsan_memory_order_relaxed); 105} 106 107inline void Acquire_Store(volatile Atomic32 *ptr, Atomic32 value) { 108 __tsan_atomic32_store(ptr, value, __tsan_memory_order_relaxed); 109 __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst); 110} 111 112inline void Release_Store(volatile Atomic32 *ptr, Atomic32 value) { 113 __tsan_atomic32_store(ptr, value, __tsan_memory_order_release); 114} 115 116inline Atomic32 NoBarrier_Load(volatile const Atomic32 *ptr) { 117 return __tsan_atomic32_load(ptr, __tsan_memory_order_relaxed); 118} 119 120inline Atomic32 Acquire_Load(volatile const Atomic32 *ptr) { 121 return __tsan_atomic32_load(ptr, __tsan_memory_order_acquire); 122} 123 124inline Atomic32 Release_Load(volatile const Atomic32 *ptr) { 125 __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst); 126 return __tsan_atomic32_load(ptr, __tsan_memory_order_relaxed); 127} 128 129inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64 *ptr, 130 Atomic64 old_value, 131 Atomic64 new_value) { 132 Atomic64 cmp = old_value; 133 __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value, 134 __tsan_memory_order_relaxed, __tsan_memory_order_relaxed); 135 return cmp; 136} 137 138inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64 *ptr, 139 Atomic64 new_value) { 140 return __tsan_atomic64_exchange(ptr, new_value, __tsan_memory_order_relaxed); 141} 142 143inline Atomic64 Acquire_AtomicExchange(volatile Atomic64 *ptr, 144 Atomic64 new_value) { 145 return __tsan_atomic64_exchange(ptr, new_value, __tsan_memory_order_acquire); 146} 147 148inline Atomic64 Release_AtomicExchange(volatile Atomic64 *ptr, 149 Atomic64 new_value) { 150 return __tsan_atomic64_exchange(ptr, new_value, __tsan_memory_order_release); 151} 152 153inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64 *ptr, 154 Atomic64 increment) { 155 return increment + __tsan_atomic64_fetch_add(ptr, increment, 156 __tsan_memory_order_relaxed); 157} 158 159inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64 *ptr, 160 Atomic64 increment) { 161 return increment + __tsan_atomic64_fetch_add(ptr, increment, 162 __tsan_memory_order_acq_rel); 163} 164 165inline void NoBarrier_Store(volatile Atomic64 *ptr, Atomic64 value) { 166 __tsan_atomic64_store(ptr, value, __tsan_memory_order_relaxed); 167} 168 169inline void Acquire_Store(volatile Atomic64 *ptr, Atomic64 value) { 170 __tsan_atomic64_store(ptr, value, __tsan_memory_order_relaxed); 171 __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst); 172} 173 174inline void Release_Store(volatile Atomic64 *ptr, Atomic64 value) { 175 __tsan_atomic64_store(ptr, value, __tsan_memory_order_release); 176} 177 178inline Atomic64 NoBarrier_Load(volatile const Atomic64 *ptr) { 179 return __tsan_atomic64_load(ptr, __tsan_memory_order_relaxed); 180} 181 182inline Atomic64 Acquire_Load(volatile const Atomic64 *ptr) { 183 return __tsan_atomic64_load(ptr, __tsan_memory_order_acquire); 184} 185 186inline Atomic64 Release_Load(volatile const Atomic64 *ptr) { 187 __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst); 188 return __tsan_atomic64_load(ptr, __tsan_memory_order_relaxed); 189} 190 191inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64 *ptr, 192 Atomic64 old_value, 193 Atomic64 new_value) { 194 Atomic64 cmp = old_value; 195 __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value, 196 __tsan_memory_order_acquire, __tsan_memory_order_acquire); 197 return cmp; 198} 199 200inline Atomic64 Release_CompareAndSwap(volatile Atomic64 *ptr, 201 Atomic64 old_value, 202 Atomic64 new_value) { 203 Atomic64 cmp = old_value; 204 __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value, 205 __tsan_memory_order_release, __tsan_memory_order_relaxed); 206 return cmp; 207} 208 209inline void MemoryBarrier() { 210 __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst); 211} 212 213} // namespace internal 214} // namespace protobuf 215} // namespace google 216 217#undef ATOMICOPS_COMPILER_BARRIER 218 219#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_TSAN_H_ 220