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
10namespace v8 {
11namespace base {
12
13inline void MemoryBarrier() { __sync_synchronize(); }
14
15inline 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
21inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
22                                         Atomic32 new_value) {
23  return __sync_lock_test_and_set(ptr, new_value);
24}
25
26inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
27                                          Atomic32 increment) {
28  return __sync_add_and_fetch(ptr, increment);
29}
30
31inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
32                                        Atomic32 increment) {
33  return __sync_add_and_fetch(ptr, increment);
34}
35
36inline 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
41inline 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
46inline void NoBarrier_Store(volatile Atomic8* ptr, Atomic8 value) {
47  __sync_lock_test_and_set(ptr, value);
48}
49
50inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
51  __sync_lock_test_and_set(ptr, value);
52}
53
54inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) {
55  __sync_lock_test_and_set(ptr, value);
56}
57
58inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
59  __sync_lock_test_and_set(ptr, value);
60}
61
62inline Atomic8 NoBarrier_Load(volatile const Atomic8* ptr) {
63  return __sync_add_and_fetch(ptr, 0);
64}
65
66inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
67  return __sync_add_and_fetch(ptr, 0);
68}
69
70inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
71  return __sync_add_and_fetch(ptr, 0);
72}
73
74inline 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
81inline 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
87inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
88                                         Atomic64 new_value) {
89  return __sync_lock_test_and_set(ptr, new_value);
90}
91
92inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
93                                          Atomic64 increment) {
94  return __sync_add_and_fetch(ptr, increment);
95}
96
97inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
98                                        Atomic64 increment) {
99  return __sync_add_and_fetch(ptr, increment);
100}
101
102inline 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
107inline 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
112inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
113  __sync_lock_test_and_set(ptr, value);
114}
115
116inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
117  __sync_lock_test_and_set(ptr, value);
118}
119
120inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
121  __sync_lock_test_and_set(ptr, value);
122}
123
124inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
125  return __sync_add_and_fetch(ptr, 0);
126}
127
128inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
129  return __sync_add_and_fetch(ptr, 0);
130}
131
132inline 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