Atomic ops: sync with Chromium.

src/atomicops_internals_mac.h

Index: src/atomicops_internals_mac.h
diff --git a/src/atomicops_internals_x86_macosx.h b/src/atomicops_internals_mac.h
similarity index 63%
rename from src/atomicops_internals_x86_macosx.h
rename to src/atomicops_internals_mac.h
index bfb02b3851f2cdb422bbb7431d16cc6fdfb1a1fa..4bd0c09bdfd4032970597540ac8f96a8156de2ad 100644
--- a/src/atomicops_internals_x86_macosx.h
+++ b/src/atomicops_internals_mac.h
@@ -27,8 +27,8 @@
 
 // This file is an internal atomic implementation, use atomicops.h instead.
 
-#ifndef V8_ATOMICOPS_INTERNALS_X86_MACOSX_H_
-#define V8_ATOMICOPS_INTERNALS_X86_MACOSX_H_
+#ifndef V8_ATOMICOPS_INTERNALS_MAC_H_
+#define V8_ATOMICOPS_INTERNALS_MAC_H_
 
 #include <libkern/OSAtomic.h>
 
@@ -65,7 +65,7 @@ inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
 }
 
 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
-                                          Atomic32 increment) {
+                                        Atomic32 increment) {
   return OSAtomicAdd32Barrier(increment, const_cast<Atomic32*>(ptr));
 }
 
@@ -132,7 +132,7 @@ inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
   Atomic64 prev_value;
   do {
     if (OSAtomicCompareAndSwap64(old_value, new_value,
-                                 const_cast<Atomic64*>(ptr))) {
+                                 reinterpret_cast<volatile int64_t*>(ptr))) {
       return old_value;
     }
     prev_value = *ptr;
@@ -146,18 +146,19 @@ inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
   do {
     old_value = *ptr;
   } while (!OSAtomicCompareAndSwap64(old_value, new_value,
-                                     const_cast<Atomic64*>(ptr)));
+                                     reinterpret_cast<volatile int64_t*>(ptr)));
   return old_value;
 }
 
 inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
                                           Atomic64 increment) {
-  return OSAtomicAdd64(increment, const_cast<Atomic64*>(ptr));
+  return OSAtomicAdd64(increment, reinterpret_cast<volatile int64_t*>(ptr));
 }
 
 inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
                                         Atomic64 increment) {
-  return OSAtomicAdd64Barrier(increment, const_cast<Atomic64*>(ptr));
+  return OSAtomicAdd64Barrier(increment,
+                              reinterpret_cast<volatile int64_t*>(ptr));
 }
 
 inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
@@ -165,8 +166,8 @@ inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
                                        Atomic64 new_value) {
   Atomic64 prev_value;
   do {
-    if (OSAtomicCompareAndSwap64Barrier(old_value, new_value,
-                                        const_cast<Atomic64*>(ptr))) {
+    if (OSAtomicCompareAndSwap64Barrier(
+        old_value, new_value, reinterpret_cast<volatile int64_t*>(ptr))) {
       return old_value;
     }
     prev_value = *ptr;
@@ -213,89 +214,6 @@ inline Atomic64 Release_Load(volatile const Atomic64* 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 v8::internal::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 v8::internal::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 v8::internal::Acquire_Store(
-      reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
-}
-
-inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) {
-  return v8::internal::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 v8::internal::Acquire_Load(
-      reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
-}
-
-inline AtomicWord Release_Load(volatile const AtomicWord* ptr) {
-  return v8::internal::Release_Load(
-      reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
-}
-
-#undef AtomicWordCastType
-
 } }  // namespace v8::internal
 
-#endif  // V8_ATOMICOPS_INTERNALS_X86_MACOSX_H_
+#endif  // V8_ATOMICOPS_INTERNALS_MAC_H_