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1 /* | |
2 * Copyright 2014 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 SkBarriers_x86_DEFINED | |
9 #define SkBarriers_x86_DEFINED | |
10 | |
11 #ifdef SK_BUILD_FOR_WIN | |
12 # include <intrin.h> | |
13 static inline void sk_compiler_barrier() { _ReadWriteBarrier(); } | |
14 #else | |
15 static inline void sk_compiler_barrier() { asm volatile("" : : : "memory"); } | |
16 #endif | |
17 | |
18 template <typename T> | |
19 T sk_acquire_load(T* ptr) { | |
20 T val = *ptr; | |
21 sk_compiler_barrier(); // On x86, all loads are acquire loads. | |
bungeman-skia
2014/05/29 18:02:52
keep tsan happy!!!
mtklein
2014/05/29 18:04:44
Coming, in another CL...
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22 return val; | |
23 } | |
24 | |
25 template <typename T> | |
26 void sk_release_store(T* ptr, T val) { | |
27 sk_compiler_barrier(); // On x86, all stores are release stores. | |
28 *ptr = val; | |
29 } | |
30 | |
31 #endif//SkBarriers_x86_DEFINED | |
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