The Tor Browser: ipc/chromium/src/base/atomicops_internals_x86

ipc/chromium/src/base/atomicops_internals_x86_macosx.h@6474c204b198 (annotated)

ipc/chromium/src/base/atomicops_internals_x86_macosx.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // This file is an internal atomic implementation, use base/atomicops.h instead.
 #ifndef BASE_ATOMICOPS_INTERNALS_X86_MACOSX_H_
 #define BASE_ATOMICOPS_INTERNALS_X86_MACOSX_H_
 #include <libkern/OSAtomic.h>
 namespace base {
 namespace subtle {
 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32 *ptr,
                                          Atomic32 old_value,
                                          Atomic32 new_value) {
   Atomic32 prev_value;
   do {
     if (OSAtomicCompareAndSwap32(old_value, new_value,
                                  const_cast<Atomic32*>(ptr))) {
       return old_value;
     }
     prev_value = *ptr;
   } while (prev_value == old_value);
   return prev_value;
 }
 inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32 *ptr,
                                          Atomic32 new_value) {
   Atomic32 old_value;
   do {
     old_value = *ptr;
   } while (!OSAtomicCompareAndSwap32(old_value, new_value,
                                      const_cast<Atomic32*>(ptr)));
   return old_value;
 }
 inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32 *ptr,
                                           Atomic32 increment) {
   return OSAtomicAdd32(increment, const_cast<Atomic32*>(ptr));
 }
 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32 *ptr,
                                           Atomic32 increment) {
   return OSAtomicAdd32Barrier(increment, const_cast<Atomic32*>(ptr));
 }
 inline void MemoryBarrier() {
   OSMemoryBarrier();
 }
 inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32 *ptr,
                                        Atomic32 old_value,
                                        Atomic32 new_value) {
   Atomic32 prev_value;
   do {
     if (OSAtomicCompareAndSwap32Barrier(old_value, new_value,
                                         const_cast<Atomic32*>(ptr))) {
       return old_value;
     }
     prev_value = *ptr;
   } while (prev_value == old_value);
   return prev_value;
 }
 inline Atomic32 Release_CompareAndSwap(volatile Atomic32 *ptr,
                                        Atomic32 old_value,
                                        Atomic32 new_value) {
   return Acquire_CompareAndSwap(ptr, old_value, new_value);
 }
 inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
   *ptr = value;
 }
 inline void Acquire_Store(volatile Atomic32 *ptr, Atomic32 value) {
   *ptr = value;
   MemoryBarrier();
 }
 inline void Release_Store(volatile Atomic32 *ptr, Atomic32 value) {
   MemoryBarrier();
   *ptr = value;
 }
 inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
   return *ptr;
 }
 inline Atomic32 Acquire_Load(volatile const Atomic32 *ptr) {
   Atomic32 value = *ptr;
   MemoryBarrier();
   return value;
 }
 inline Atomic32 Release_Load(volatile const Atomic32 *ptr) {
   MemoryBarrier();
   return *ptr;
 }
 #ifdef __LP64__
 // 64-bit implementation on 64-bit platform
 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64 *ptr,
                                          Atomic64 old_value,
                                          Atomic64 new_value) {
   Atomic64 prev_value;
   do {
     if (OSAtomicCompareAndSwap64(old_value, new_value,
                                  const_cast<Atomic64*>(ptr))) {
       return old_value;
     }
     prev_value = *ptr;
   } while (prev_value == old_value);
   return prev_value;
 }
 inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64 *ptr,
                                          Atomic64 new_value) {
   Atomic64 old_value;
   do {
     old_value = *ptr;
   } while (!OSAtomicCompareAndSwap64(old_value, new_value,
                                      const_cast<Atomic64*>(ptr)));
   return old_value;
 }
 inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64 *ptr,
                                           Atomic64 increment) {
   return OSAtomicAdd64(increment, const_cast<Atomic64*>(ptr));
 }
 inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64 *ptr,
                                         Atomic64 increment) {
   return OSAtomicAdd64Barrier(increment, const_cast<Atomic64*>(ptr));
 }
 inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64 *ptr,
                                        Atomic64 old_value,
                                        Atomic64 new_value) {
   Atomic64 prev_value;
   do {
     if (OSAtomicCompareAndSwap64Barrier(old_value, new_value,
                                         const_cast<Atomic64*>(ptr))) {
       return old_value;
     }
     prev_value = *ptr;
   } while (prev_value == old_value);
   return prev_value;
 }
 inline Atomic64 Release_CompareAndSwap(volatile Atomic64 *ptr,
                                        Atomic64 old_value,
                                        Atomic64 new_value) {
   // The lib kern interface does not distinguish between
   // Acquire and Release memory barriers; they are equivalent.
   return Acquire_CompareAndSwap(ptr, old_value, new_value);
 }
 inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
   *ptr = value;
 }
 inline void Acquire_Store(volatile Atomic64 *ptr, Atomic64 value) {
   *ptr = value;
   MemoryBarrier();
 }
 inline void Release_Store(volatile Atomic64 *ptr, Atomic64 value) {
   MemoryBarrier();
   *ptr = value;
 }
 inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
   return *ptr;
 }
 inline Atomic64 Acquire_Load(volatile const Atomic64 *ptr) {
   Atomic64 value = *ptr;
   MemoryBarrier();
   return value;
 }
 inline Atomic64 Release_Load(volatile const Atomic64 *ptr) {
   MemoryBarrier();
   return *ptr;
 }
 #endif  // defined(__LP64__)
 // MacOS uses long for intptr_t, AtomicWord and Atomic32 are always different
 // on the Mac, even when they are the same size.  We need to explicitly cast
 // from AtomicWord to Atomic32/64 to implement the AtomicWord interface.
 #ifdef __LP64__
 #define AtomicWordCastType Atomic64
 #else
 #define AtomicWordCastType Atomic32
 #endif
 inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr,
                                            AtomicWord old_value,
                                            AtomicWord new_value) {
   return NoBarrier_CompareAndSwap(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr),
       old_value, new_value);
 }
 inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr,
                                            AtomicWord new_value) {
   return NoBarrier_AtomicExchange(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr), new_value);
 }
 inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr,
                                             AtomicWord increment) {
   return NoBarrier_AtomicIncrement(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr), increment);
 }
 inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr,
                                           AtomicWord increment) {
   return Barrier_AtomicIncrement(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr), increment);
 }
 inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr,
                                          AtomicWord old_value,
                                          AtomicWord new_value) {
   return base::subtle::Acquire_CompareAndSwap(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr),
       old_value, new_value);
 }
 inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr,
                                          AtomicWord old_value,
                                          AtomicWord new_value) {
   return base::subtle::Release_CompareAndSwap(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr),
       old_value, new_value);
 }
 inline void NoBarrier_Store(volatile AtomicWord *ptr, AtomicWord value) {
   NoBarrier_Store(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
 }
 inline void Acquire_Store(volatile AtomicWord* ptr, AtomicWord value) {
   return base::subtle::Acquire_Store(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
 }
 inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) {
   return base::subtle::Release_Store(
       reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
 }
 inline AtomicWord NoBarrier_Load(volatile const AtomicWord *ptr) {
   return NoBarrier_Load(
       reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
 }
 inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) {
   return base::subtle::Acquire_Load(
       reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
 }
 inline AtomicWord Release_Load(volatile const AtomicWord* ptr) {
   return base::subtle::Release_Load(
       reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
 }
 #undef AtomicWordCastType
 }   // namespace base::subtle
 }   // namespace base
 #endif  // BASE_ATOMICOPS_INTERNALS_X86_MACOSX_H_

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ipc/chromium/src/base/atomicops_internals_x86_macosx.h@6474c204b198 (annotated)

ipc/chromium/src/base/atomicops_internals_x86_macosx.h