13551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// Protocol Buffers - Google's data interchange format 23551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// Copyright 2012 Google Inc. All rights reserved. 33551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// http://code.google.com/p/protobuf/ 43551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// 53551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// Redistribution and use in source and binary forms, with or without 63551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// modification, are permitted provided that the following conditions are 73551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// met: 83551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// 93551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// * Redistributions of source code must retain the above copyright 103551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// notice, this list of conditions and the following disclaimer. 113551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// * Redistributions in binary form must reproduce the above 123551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// copyright notice, this list of conditions and the following disclaimer 133551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// in the documentation and/or other materials provided with the 143551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// distribution. 153551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// * Neither the name of Google Inc. nor the names of its 163551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// contributors may be used to endorse or promote products derived from 173551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// this software without specific prior written permission. 183551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// 193551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 203551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 213551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 223551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 233551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 243551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 253551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 263551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 273551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 283551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 293551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 303551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 313551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// This file is an internal atomic implementation, use atomicops.h instead. 323551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 333551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM_QNX_H_ 343551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM_QNX_H_ 353551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 363551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)// For _smp_cmpxchg() 373551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#include <pthread.h> 383551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 393551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)namespace google { 403551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)namespace protobuf { 413551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)namespace internal { 423551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 433551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 QNXCmpxchg(Atomic32 old_value, 443551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 new_value, 453551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) volatile Atomic32* ptr) { 463551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return static_cast<Atomic32>( 473551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) _smp_cmpxchg((volatile unsigned *)ptr, 483551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) (unsigned)old_value, 493551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) (unsigned)new_value)); 503551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 513551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 523551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 533551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, 543551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 old_value, 553551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 new_value) { 563551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 prev_value = *ptr; 573551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) do { 583551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) if (!QNXCmpxchg(old_value, new_value, 593551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) const_cast<Atomic32*>(ptr))) { 603551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return old_value; 613551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) } 623551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) prev_value = *ptr; 633551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) } while (prev_value == old_value); 643551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return prev_value; 653551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 663551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 673551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, 683551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 new_value) { 693551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 old_value; 703551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) do { 713551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) old_value = *ptr; 723551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) } while (QNXCmpxchg(old_value, new_value, 733551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) const_cast<Atomic32*>(ptr))); 743551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return old_value; 753551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 763551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 773551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, 783551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 increment) { 793551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return Barrier_AtomicIncrement(ptr, increment); 803551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 813551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 823551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, 833551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 increment) { 843551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) for (;;) { 853551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // Atomic exchange the old value with an incremented one. 863551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 old_value = *ptr; 873551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 new_value = old_value + increment; 883551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) if (QNXCmpxchg(old_value, new_value, 893551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) const_cast<Atomic32*>(ptr)) == 0) { 903551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // The exchange took place as expected. 913551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return new_value; 923551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) } 933551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // Otherwise, *ptr changed mid-loop and we need to retry. 943551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) } 953551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 963551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 973551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, 983551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 old_value, 993551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 new_value) { 1003551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return NoBarrier_CompareAndSwap(ptr, old_value, new_value); 1013551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1023551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1033551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, 1043551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 old_value, 1053551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 new_value) { 1063551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return NoBarrier_CompareAndSwap(ptr, old_value, new_value); 1073551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1083551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1093551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { 1103551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) *ptr = value; 1113551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1123551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1133551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline void MemoryBarrier() { 1143551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) __sync_synchronize(); 1153551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1163551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1173551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { 1183551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) *ptr = value; 1193551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) MemoryBarrier(); 1203551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1213551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1223551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { 1233551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) MemoryBarrier(); 1243551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) *ptr = value; 1253551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1263551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1273551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { 1283551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return *ptr; 1293551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1303551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1313551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { 1323551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Atomic32 value = *ptr; 1333551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) MemoryBarrier(); 1343551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return value; 1353551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1363551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1373551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)inline Atomic32 Release_Load(volatile const Atomic32* ptr) { 1383551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) MemoryBarrier(); 1393551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return *ptr; 1403551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1413551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1423551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} // namespace internal 1433551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} // namespace protobuf 1443551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} // namespace google 1453551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 1463551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM_QNX_H_ 147