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
MemoryBarrier()13 inline void MemoryBarrier() { __sync_synchronize(); }
14
NoBarrier_CompareAndSwap(volatile Atomic32 * ptr,Atomic32 old_value,Atomic32 new_value)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
NoBarrier_AtomicExchange(volatile Atomic32 * ptr,Atomic32 new_value)21 inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
22 Atomic32 new_value) {
23 return __sync_lock_test_and_set(ptr, new_value);
24 }
25
NoBarrier_AtomicIncrement(volatile Atomic32 * ptr,Atomic32 increment)26 inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
27 Atomic32 increment) {
28 return __sync_add_and_fetch(ptr, increment);
29 }
30
Barrier_AtomicIncrement(volatile Atomic32 * ptr,Atomic32 increment)31 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
32 Atomic32 increment) {
33 return __sync_add_and_fetch(ptr, increment);
34 }
35
Acquire_CompareAndSwap(volatile Atomic32 * ptr,Atomic32 old_value,Atomic32 new_value)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
Release_CompareAndSwap(volatile Atomic32 * ptr,Atomic32 old_value,Atomic32 new_value)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
NoBarrier_Store(volatile Atomic8 * ptr,Atomic8 value)46 inline void NoBarrier_Store(volatile Atomic8* ptr, Atomic8 value) {
47 __sync_lock_test_and_set(ptr, value);
48 }
49
NoBarrier_Store(volatile Atomic32 * ptr,Atomic32 value)50 inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
51 __sync_lock_test_and_set(ptr, value);
52 }
53
Acquire_Store(volatile Atomic32 * ptr,Atomic32 value)54 inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) {
55 __sync_lock_test_and_set(ptr, value);
56 }
57
Release_Store(volatile Atomic32 * ptr,Atomic32 value)58 inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
59 __sync_lock_test_and_set(ptr, value);
60 }
61
NoBarrier_Load(volatile const Atomic8 * ptr)62 inline Atomic8 NoBarrier_Load(volatile const Atomic8* ptr) {
63 return __sync_add_and_fetch(ptr, 0);
64 }
65
NoBarrier_Load(volatile const Atomic32 * ptr)66 inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
67 return __sync_add_and_fetch(ptr, 0);
68 }
69
Acquire_Load(volatile const Atomic32 * ptr)70 inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
71 return __sync_add_and_fetch(ptr, 0);
72 }
73
Release_Load(volatile const Atomic32 * ptr)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
NoBarrier_CompareAndSwap(volatile Atomic64 * ptr,Atomic64 old_value,Atomic64 new_value)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
NoBarrier_AtomicExchange(volatile Atomic64 * ptr,Atomic64 new_value)87 inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
88 Atomic64 new_value) {
89 return __sync_lock_test_and_set(ptr, new_value);
90 }
91
NoBarrier_AtomicIncrement(volatile Atomic64 * ptr,Atomic64 increment)92 inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
93 Atomic64 increment) {
94 return __sync_add_and_fetch(ptr, increment);
95 }
96
Barrier_AtomicIncrement(volatile Atomic64 * ptr,Atomic64 increment)97 inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
98 Atomic64 increment) {
99 return __sync_add_and_fetch(ptr, increment);
100 }
101
Acquire_CompareAndSwap(volatile Atomic64 * ptr,Atomic64 old_value,Atomic64 new_value)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
Release_CompareAndSwap(volatile Atomic64 * ptr,Atomic64 old_value,Atomic64 new_value)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
NoBarrier_Store(volatile Atomic64 * ptr,Atomic64 value)112 inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
113 __sync_lock_test_and_set(ptr, value);
114 }
115
Acquire_Store(volatile Atomic64 * ptr,Atomic64 value)116 inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
117 __sync_lock_test_and_set(ptr, value);
118 }
119
Release_Store(volatile Atomic64 * ptr,Atomic64 value)120 inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
121 __sync_lock_test_and_set(ptr, value);
122 }
123
NoBarrier_Load(volatile const Atomic64 * ptr)124 inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
125 return __sync_add_and_fetch(ptr, 0);
126 }
127
Acquire_Load(volatile const Atomic64 * ptr)128 inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
129 return __sync_add_and_fetch(ptr, 0);
130 }
131
Release_Load(volatile const Atomic64 * ptr)132 inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
133 return __sync_add_and_fetch(ptr, 0);
134 }
135 } // namespace base
136 } // namespace v8
137
138 #endif // V8_BASE_ATOMICOPS_INTERNALS_PORTABLE_H_
139