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1 /* | |
2 * Copyright 2015 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 #ifndef SkAtomics_atomic_DEFINED | |
9 #define SkAtomics_atomic_DEFINED | |
10 | |
11 template <typename T> | |
12 T sk_atomic_load(const T* ptr, sk_memory_order mo) { | |
13 SkASSERT(mo == sk_memory_order_relaxed || | |
14 mo == sk_memory_order_seq_cst || | |
15 mo == sk_memory_order_acquire || | |
16 mo == sk_memory_order_consume); | |
17 return __atomic_load_n(ptr, mo); | |
18 } | |
19 | |
20 template <typename T> | |
21 void sk_atomic_store(T* ptr, T val, sk_memory_order mo) { | |
22 SkASSERT(mo == sk_memory_order_relaxed || | |
23 mo == sk_memory_order_seq_cst || | |
24 mo == sk_memory_order_release); | |
25 __atomic_store_n(ptr, val, mo); | |
26 } | |
27 | |
28 template <typename T> | |
29 T sk_atomic_fetch_add(T* ptr, T val, sk_memory_order mo) { | |
30 // All values of mo are valid. | |
31 return __atomic_fetch_add(ptr, val, mo); | |
32 } | |
33 | |
34 template <typename T> | |
35 T sk_atomic_fetch_sub(T* ptr, T val, sk_memory_order mo) { | |
36 // All values of mo are valid. | |
37 return __atomic_fetch_sub(ptr, val, mo); | |
38 } | |
39 | |
40 template <typename T> | |
41 bool sk_atomic_compare_exchange(T* ptr, T* expected, T desired, | |
42 sk_memory_order success, | |
43 sk_memory_order failure) { | |
44 // All values of success are valid. | |
45 SkASSERT(failure == sk_memory_order_relaxed || | |
46 failure == sk_memory_order_seq_cst || | |
47 failure == sk_memory_order_acquire || | |
48 failure == sk_memory_order_consume); | |
49 SkASSERT(failure <= success); | |
50 return __atomic_compare_exchange_n(ptr, expected, desired, false/*weak?*/, s
uccess, failure); | |
51 } | |
52 | |
53 template <typename T> | |
54 T sk_atomic_exchange(T* ptr, T val, sk_memory_order mo) { | |
55 // All values of mo are valid. | |
56 return __atomic_exchange_n(ptr, val, mo); | |
57 } | |
58 | |
59 #endif//SkAtomics_atomic_DEFINED | |
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