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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file is an internal atomic implementation, use base/atomicops.h instead. | 5 // This file is an internal atomic implementation, use base/atomicops.h instead. |
6 | 6 |
7 // TODO(rmcilroy): Investigate whether we can use __sync__ intrinsics instead of | 7 // TODO(rmcilroy): Investigate whether we can use __sync__ intrinsics instead of |
8 // the hand coded assembly without introducing perf regressions. | 8 // the hand coded assembly without introducing perf regressions. |
9 // TODO(rmcilroy): Investigate whether we can use acquire / release versions of | 9 // TODO(rmcilroy): Investigate whether we can use acquire / release versions of |
10 // exclusive load / store assembly instructions and do away with | 10 // exclusive load / store assembly instructions and do away with |
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294 ); // NOLINT | 294 ); // NOLINT |
295 | 295 |
296 return value; | 296 return value; |
297 } | 297 } |
298 | 298 |
299 inline Atomic64 Release_Load(volatile const Atomic64* ptr) { | 299 inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
300 MemoryBarrier(); | 300 MemoryBarrier(); |
301 return *ptr; | 301 return *ptr; |
302 } | 302 } |
303 | 303 |
304 } // namespace base::subtle | 304 } // namespace subtle |
305 } // namespace base | 305 } // namespace base |
306 | 306 |
307 #endif // BASE_ATOMICOPS_INTERNALS_ARM64_GCC_H_ | 307 #endif // BASE_ATOMICOPS_INTERNALS_ARM64_GCC_H_ |
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