15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Copyright (c) 2006, Google Inc. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * All rights reserved. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * modification, are permitted provided that the following conditions are 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * met: 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * * Redistributions of source code must retain the above copyright 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * notice, this list of conditions and the following disclaimer. 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * * Redistributions in binary form must reproduce the above 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * copyright notice, this list of conditions and the following disclaimer 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * in the documentation and/or other materials provided with the 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * distribution. 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * * Neither the name of Google Inc. nor the names of its 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * contributors may be used to endorse or promote products derived from 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * this software without specific prior written permission. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * --- 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Author: Sanjay Ghemawat 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// For atomic operations on statistics counters, see atomic_stats_counter.h. 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// For atomic operations on sequence numbers, see atomic_sequence_num.h. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// For atomic operations on reference counts, see atomic_refcount.h. 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Some fast atomic operations -- typically with machine-dependent 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// implementations. This file may need editing as Google code is 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ported to different architectures. 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The routines exported by this module are subtle. If you use them, even if 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// you get the code right, it will depend on careful reasoning about atomicity 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and memory ordering; it will be less readable, and harder to maintain. If 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// you plan to use these routines, you should have a good reason, such as solid 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// evidence that performance would otherwise suffer, or there being no 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// alternative. You should assume only properties explicitly guaranteed by the 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// specifications in this file. You are almost certainly _not_ writing code 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// just for the x86; if you assume x86 semantics, x86 hardware bugs and 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// implementations on other archtectures will cause your code to break. If you 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// do not know what you are doing, avoid these routines, and use a Mutex. 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// It is incorrect to make direct assignments to/from an atomic variable. 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// You should use one of the Load or Store routines. The NoBarrier 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// versions are provided when no barriers are needed: 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NoBarrier_Store() 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NoBarrier_Load() 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Although there are currently no compiler enforcement, you are encouraged 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// to use these. Moreover, if you choose to use base::subtle::Atomic64 type, 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// you MUST use one of the Load or Store routines to get correct behavior 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// on 32-bit platforms. 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The intent is eventually to put all of these routines in namespace 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// base::subtle 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef THREAD_ATOMICOPS_H_ 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define THREAD_ATOMICOPS_H_ 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <config.h> 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef HAVE_STDINT_H 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdint.h> 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Include the platform specific implementations of the types 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and operations listed below. Implementations are to provide Atomic32 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and Atomic64 operations. If there is a mismatch between intptr_t and 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the Atomic32 or Atomic64 types for a platform, the platform-specific header 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// should define the macro, AtomicWordCastType in a clause similar to the 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// following: 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// #if ...pointers are 64 bits... 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// # define AtomicWordCastType base::subtle::Atomic64 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// #else 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// # define AtomicWordCastType Atomic32 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// #endif 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(csilvers): figure out ARCH_PIII/ARCH_K8 (perhaps via ./configure?) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/arm_instruction_set_select.h" 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(csilvers): match piii, not just __i386. Also, match k8 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__MACH__) && defined(__APPLE__) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-macosx.h" 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(__GNUC__) && defined(ARMV6) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-arm-v6plus.h" 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(ARMV3) 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-arm-generic.h" 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(_WIN32) 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-windows.h" 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(__GNUC__) && (defined(__i386) || defined(__x86_64__)) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-x86.h" 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#elif defined(__linux__) && defined(__PPC__) 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-linuxppc.h" 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Assume x86 for now. If you need to support a new architecture and 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// don't know how to implement atomic ops, you can probably get away 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// with using pthreads, since atomicops is only used by spinlock.h/cc 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//#error You need to implement atomic operations for this architecture 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/atomicops-internals-x86.h" 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Signed type that can hold a pointer and supports the atomic ops below, as 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// well as atomic loads and stores. Instances must be naturally-aligned. 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef intptr_t AtomicWord; 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef AtomicWordCastType 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This section is needed only when explicit type casting is required to 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// cast AtomicWord to one of the basic atomic types (Atomic64 or Atomic32). 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// It also serves to document the AtomicWord interface. 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace subtle { 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Atomically execute: 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// result = *ptr; 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// if (*ptr == old_value) 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// *ptr = new_value; 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// return result; 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// I.e., replace "*ptr" with "new_value" if "*ptr" used to be "old_value". 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Always return the old value of "*ptr" 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This routine implies no memory barriers. 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr, 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord old_value, 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord new_value) { 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NoBarrier_CompareAndSwap( 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) old_value, new_value); 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Atomically store new_value into *ptr, returning the previous value held in 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// *ptr. This routine implies no memory barriers. 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr, 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord new_value) { 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NoBarrier_AtomicExchange( 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), new_value); 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Atomically increment *ptr by "increment". Returns the new value of 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// *ptr with the increment applied. This routine implies no memory 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// barriers. 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr, 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord increment) { 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NoBarrier_AtomicIncrement( 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), increment); 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr, 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord increment) { 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Barrier_AtomicIncrement( 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), increment); 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// These following lower-level operations are typically useful only to people 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// implementing higher-level synchronization operations like spinlocks, 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// mutexes, and condition-variables. They combine CompareAndSwap(), a load, or 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// a store with appropriate memory-ordering instructions. "Acquire" operations 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ensure that no later memory access can be reordered ahead of the operation. 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "Release" operations ensure that no previous memory access can be reordered 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// after the operation. "Barrier" operations have both "Acquire" and "Release" 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// semantics. A MemoryBarrier() has "Barrier" semantics, but does no memory 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// access. 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr, 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord old_value, 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord new_value) { 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_CompareAndSwap( 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) old_value, new_value); 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr, 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord old_value, 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord new_value) { 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_CompareAndSwap( 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) old_value, new_value); 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void NoBarrier_Store(volatile AtomicWord *ptr, AtomicWord value) { 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NoBarrier_Store( 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), value); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Acquire_Store(volatile AtomicWord* ptr, AtomicWord value) { 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_Store( 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), value); 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) { 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Store( 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile AtomicWordCastType*>(ptr), value); 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord NoBarrier_Load(volatile const AtomicWord *ptr) { 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NoBarrier_Load( 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile const AtomicWordCastType*>(ptr)); 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) { 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_Load( 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile const AtomicWordCastType*>(ptr)); 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Release_Load(volatile const AtomicWord* ptr) { 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Load( 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<volatile const AtomicWordCastType*>(ptr)); 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base::subtle 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // AtomicWordCastType 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Commented out type definitions and method declarations for documentation 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// of the interface provided by this module. 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if 0 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Signed 32-bit type that supports the atomic ops below, as well as atomic 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// loads and stores. Instances must be naturally aligned. This type differs 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// from AtomicWord in 64-bit binaries where AtomicWord is 64-bits. 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef int32_t Atomic32; 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Corresponding operations on Atomic32 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace subtle { 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Signed 64-bit type that supports the atomic ops below, as well as atomic 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// loads and stores. Instances must be naturally aligned. This type differs 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// from AtomicWord in 32-bit binaries where AtomicWord is 32-bits. 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef int64_t Atomic64; 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 old_value, 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 new_value); 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, Atomic32 new_value); 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, Atomic32 increment); 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 increment); 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 old_value, 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 new_value); 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 old_value, 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 new_value); 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value); 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Acquire_Store(volatile Atomic32* ptr, Atomic32 value); 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Release_Store(volatile Atomic32* ptr, Atomic32 value); 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 NoBarrier_Load(volatile const Atomic32* ptr); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 Acquire_Load(volatile const Atomic32* ptr); 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic32 Release_Load(volatile const Atomic32* ptr); 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Corresponding operations on Atomic64 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic64 old_value, 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic64 new_value); 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, Atomic64 new_value); 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, Atomic64 increment); 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, Atomic64 increment); 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic64 old_value, 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic64 new_value); 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic64 old_value, 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic64 new_value); 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value); 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Acquire_Store(volatile Atomic64* ptr, Atomic64 value); 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Release_Store(volatile Atomic64* ptr, Atomic64 value); 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 NoBarrier_Load(volatile const Atomic64* ptr); 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 Acquire_Load(volatile const Atomic64* ptr); 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Atomic64 Release_Load(volatile const Atomic64* ptr); 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base::subtle 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MemoryBarrier(); 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // 0 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The following are to be deprecated when all uses have been changed to 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// use the base::subtle namespace. 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ------------------------------------------------------------------------ 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef AtomicWordCastType 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// AtomicWord versions to be deprecated 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr, 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord old_value, 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord new_value) { 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_CompareAndSwap(ptr, old_value, new_value); 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr, 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord old_value, 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AtomicWord new_value) { 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_CompareAndSwap(ptr, old_value, new_value); 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Acquire_Store(volatile AtomicWord* ptr, AtomicWord value) { 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_Store(ptr, value); 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) { 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Store(ptr, value); 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) { 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_Load(ptr); 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline AtomicWord Release_Load(volatile const AtomicWord* ptr) { 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Load(ptr); 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // AtomicWordCastType 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 32-bit Acquire/Release operations to be deprecated. 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 old_value, 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 new_value) { 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_CompareAndSwap(ptr, old_value, new_value); 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 old_value, 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Atomic32 new_value) { 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_CompareAndSwap(ptr, old_value, new_value); 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::subtle::Acquire_Store(ptr, value); 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Store(ptr, value); 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_Load(ptr); 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline Atomic32 Release_Load(volatile const Atomic32* ptr) { 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Load(ptr); 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef BASE_HAS_ATOMIC64 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 64-bit Acquire/Release operations to be deprecated. 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline base::subtle::Atomic64 Acquire_CompareAndSwap( 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volatile base::subtle::Atomic64* ptr, 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::subtle::Atomic64 old_value, base::subtle::Atomic64 new_value) { 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_CompareAndSwap(ptr, old_value, new_value); 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline base::subtle::Atomic64 Release_CompareAndSwap( 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volatile base::subtle::Atomic64* ptr, 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::subtle::Atomic64 old_value, base::subtle::Atomic64 new_value) { 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_CompareAndSwap(ptr, old_value, new_value); 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Acquire_Store( 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volatile base::subtle::Atomic64* ptr, base::subtle::Atomic64 value) { 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::subtle::Acquire_Store(ptr, value); 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline void Release_Store( 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volatile base::subtle::Atomic64* ptr, base::subtle::Atomic64 value) { 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Store(ptr, value); 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline base::subtle::Atomic64 Acquire_Load( 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volatile const base::subtle::Atomic64* ptr) { 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Acquire_Load(ptr); 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)inline base::subtle::Atomic64 Release_Load( 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volatile const base::subtle::Atomic64* ptr) { 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::subtle::Release_Load(ptr); 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_HAS_ATOMIC64 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // THREAD_ATOMICOPS_H_ 392