1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
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13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 // This file is an internal atomic implementation, use atomicops.h instead.
30 #ifndef V8_ATOMICOPS_INTERNALS_X86_MACOSX_H_
31 #define V8_ATOMICOPS_INTERNALS_X86_MACOSX_H_
33 #include <libkern/OSAtomic.h>
38 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
43 if (OSAtomicCompareAndSwap32(old_value, new_value,
44 const_cast<Atomic32*>(ptr))) {
48 } while (prev_value == old_value);
52 inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
57 } while (!OSAtomicCompareAndSwap32(old_value, new_value,
58 const_cast<Atomic32*>(ptr)));
62 inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
64 return OSAtomicAdd32(increment, const_cast<Atomic32*>(ptr));
67 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
69 return OSAtomicAdd32Barrier(increment, const_cast<Atomic32*>(ptr));
72 inline void MemoryBarrier() {
76 inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
81 if (OSAtomicCompareAndSwap32Barrier(old_value, new_value,
82 const_cast<Atomic32*>(ptr))) {
86 } while (prev_value == old_value);
90 inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
93 return Acquire_CompareAndSwap(ptr, old_value, new_value);
96 inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
100 inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) {
105 inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
110 inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
114 inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
115 Atomic32 value = *ptr;
120 inline Atomic32 Release_Load(volatile const Atomic32* ptr) {
127 // 64-bit implementation on 64-bit platform
129 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
131 Atomic64 new_value) {
134 if (OSAtomicCompareAndSwap64(old_value, new_value,
135 const_cast<Atomic64*>(ptr))) {
139 } while (prev_value == old_value);
143 inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
144 Atomic64 new_value) {
148 } while (!OSAtomicCompareAndSwap64(old_value, new_value,
149 const_cast<Atomic64*>(ptr)));
153 inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
154 Atomic64 increment) {
155 return OSAtomicAdd64(increment, const_cast<Atomic64*>(ptr));
158 inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
159 Atomic64 increment) {
160 return OSAtomicAdd64Barrier(increment, const_cast<Atomic64*>(ptr));
163 inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
165 Atomic64 new_value) {
168 if (OSAtomicCompareAndSwap64Barrier(old_value, new_value,
169 const_cast<Atomic64*>(ptr))) {
173 } while (prev_value == old_value);
177 inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
179 Atomic64 new_value) {
180 // The lib kern interface does not distinguish between
181 // Acquire and Release memory barriers; they are equivalent.
182 return Acquire_CompareAndSwap(ptr, old_value, new_value);
185 inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
189 inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
194 inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
199 inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
203 inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
204 Atomic64 value = *ptr;
209 inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
214 #endif // defined(__LP64__)
216 // MacOS uses long for intptr_t, AtomicWord and Atomic32 are always different
217 // on the Mac, even when they are the same size. We need to explicitly cast
218 // from AtomicWord to Atomic32/64 to implement the AtomicWord interface.
220 #define AtomicWordCastType Atomic64
222 #define AtomicWordCastType Atomic32
225 inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr,
226 AtomicWord old_value,
227 AtomicWord new_value) {
228 return NoBarrier_CompareAndSwap(
229 reinterpret_cast<volatile AtomicWordCastType*>(ptr),
230 old_value, new_value);
233 inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr,
234 AtomicWord new_value) {
235 return NoBarrier_AtomicExchange(
236 reinterpret_cast<volatile AtomicWordCastType*>(ptr), new_value);
239 inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr,
240 AtomicWord increment) {
241 return NoBarrier_AtomicIncrement(
242 reinterpret_cast<volatile AtomicWordCastType*>(ptr), increment);
245 inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr,
246 AtomicWord increment) {
247 return Barrier_AtomicIncrement(
248 reinterpret_cast<volatile AtomicWordCastType*>(ptr), increment);
251 inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr,
252 AtomicWord old_value,
253 AtomicWord new_value) {
254 return v8::internal::Acquire_CompareAndSwap(
255 reinterpret_cast<volatile AtomicWordCastType*>(ptr),
256 old_value, new_value);
259 inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr,
260 AtomicWord old_value,
261 AtomicWord new_value) {
262 return v8::internal::Release_CompareAndSwap(
263 reinterpret_cast<volatile AtomicWordCastType*>(ptr),
264 old_value, new_value);
267 inline void NoBarrier_Store(volatile AtomicWord* ptr, AtomicWord value) {
269 reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
272 inline void Acquire_Store(volatile AtomicWord* ptr, AtomicWord value) {
273 return v8::internal::Acquire_Store(
274 reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
277 inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) {
278 return v8::internal::Release_Store(
279 reinterpret_cast<volatile AtomicWordCastType*>(ptr), value);
282 inline AtomicWord NoBarrier_Load(volatile const AtomicWord* ptr) {
283 return NoBarrier_Load(
284 reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
287 inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) {
288 return v8::internal::Acquire_Load(
289 reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
292 inline AtomicWord Release_Load(volatile const AtomicWord* ptr) {
293 return v8::internal::Release_Load(
294 reinterpret_cast<volatile const AtomicWordCastType*>(ptr));
297 #undef AtomicWordCastType
299 } } // namespace v8::internal
301 #endif // V8_ATOMICOPS_INTERNALS_X86_MACOSX_H_