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| 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // This file is an internal atomic implementation, use atomicops.h instead. |
| 6 |
| 7 #ifndef V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_ |
| 8 #define V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_ |
| 9 |
| 10 namespace v8 { |
| 11 namespace base { |
| 12 |
| 13 inline void MemoryBarrier() { __sync_synchronize(); } |
| 14 |
| 15 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
| 16 Atomic32 old_value, |
| 17 Atomic32 new_value) { |
| 18 return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| 19 } |
| 20 |
| 21 inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, |
| 22 Atomic32 new_value) { |
| 23 return __sync_lock_test_and_set(ptr, new_value); |
| 24 } |
| 25 |
| 26 inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, |
| 27 Atomic32 increment) { |
| 28 return __sync_add_and_fetch(ptr, increment); |
| 29 } |
| 30 |
| 31 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
| 32 Atomic32 increment) { |
| 33 return __sync_add_and_fetch(ptr, increment); |
| 34 } |
| 35 |
| 36 inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
| 37 Atomic32 old_value, Atomic32 new_value) { |
| 38 return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| 39 } |
| 40 |
| 41 inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
| 42 Atomic32 old_value, Atomic32 new_value) { |
| 43 return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| 44 } |
| 45 |
| 46 inline void NoBarrier_Store(volatile Atomic8* ptr, Atomic8 value) { |
| 47 __sync_lock_test_and_set(ptr, value); |
| 48 } |
| 49 |
| 50 inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 51 __sync_lock_test_and_set(ptr, value); |
| 52 } |
| 53 |
| 54 inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 55 __sync_lock_test_and_set(ptr, value); |
| 56 } |
| 57 |
| 58 inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 59 __sync_lock_test_and_set(ptr, value); |
| 60 } |
| 61 |
| 62 inline Atomic8 NoBarrier_Load(volatile const Atomic8* ptr) { |
| 63 return __sync_add_and_fetch(ptr, 0); |
| 64 } |
| 65 |
| 66 inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { |
| 67 return __sync_add_and_fetch(ptr, 0); |
| 68 } |
| 69 |
| 70 inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { |
| 71 return __sync_add_and_fetch(ptr, 0); |
| 72 } |
| 73 |
| 74 inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
| 75 return __sync_add_and_fetch(ptr, 0); |
| 76 } |
| 77 |
| 78 // 64-bit versions of the operations. |
| 79 // See the 32-bit versions for comments. |
| 80 |
| 81 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
| 82 Atomic64 old_value, |
| 83 Atomic64 new_value) { |
| 84 return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| 85 } |
| 86 |
| 87 inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, |
| 88 Atomic64 new_value) { |
| 89 return __sync_lock_test_and_set(ptr, new_value); |
| 90 } |
| 91 |
| 92 inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, |
| 93 Atomic64 increment) { |
| 94 return __sync_add_and_fetch(ptr, increment); |
| 95 } |
| 96 |
| 97 inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, |
| 98 Atomic64 increment) { |
| 99 return __sync_add_and_fetch(ptr, increment); |
| 100 } |
| 101 |
| 102 inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
| 103 Atomic64 old_value, Atomic64 new_value) { |
| 104 return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| 105 } |
| 106 |
| 107 inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| 108 Atomic64 old_value, Atomic64 new_value) { |
| 109 return __sync_val_compare_and_swap(ptr, old_value, new_value); |
| 110 } |
| 111 |
| 112 inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 113 __sync_lock_test_and_set(ptr, value); |
| 114 } |
| 115 |
| 116 inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 117 __sync_lock_test_and_set(ptr, value); |
| 118 } |
| 119 |
| 120 inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 121 __sync_lock_test_and_set(ptr, value); |
| 122 } |
| 123 |
| 124 inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { |
| 125 return __sync_add_and_fetch(ptr, 0); |
| 126 } |
| 127 |
| 128 inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { |
| 129 return __sync_add_and_fetch(ptr, 0); |
| 130 } |
| 131 |
| 132 inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
| 133 return __sync_add_and_fetch(ptr, 0); |
| 134 } |
| 135 } |
| 136 } // namespace v8::base |
| 137 |
| 138 #endif // V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_ |
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