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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkAtomics_android_DEFINED | 8 #ifndef SkAtomics_android_DEFINED |
9 #define SkAtomics_android_DEFINED | 9 #define SkAtomics_android_DEFINED |
10 | 10 |
(...skipping 14 matching lines...) Expand all Loading... |
25 return android_atomic_dec(addr); | 25 return android_atomic_dec(addr); |
26 } | 26 } |
27 | 27 |
28 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomi
c_dec() { | 28 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomi
c_dec() { |
29 //HACK: Android is actually using full memory barriers. | 29 //HACK: Android is actually using full memory barriers. |
30 // Should this change, uncomment below. | 30 // Should this change, uncomment below. |
31 //int dummy; | 31 //int dummy; |
32 //android_atomic_acquire_store(0, &dummy); | 32 //android_atomic_acquire_store(0, &dummy); |
33 } | 33 } |
34 | 34 |
35 static inline __attribute__((always_inline)) int32_t sk_atomic_conditional_inc(i
nt32_t* addr) { | |
36 while (true) { | |
37 int32_t value = *addr; | |
38 if (value == 0) { | |
39 return 0; | |
40 } | |
41 if (0 == android_atomic_release_cas(value, value + 1, addr)) { | |
42 return value; | |
43 } | |
44 } | |
45 } | |
46 | |
47 static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr, | 35 static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr, |
48 int32_t before, | 36 int32_t before, |
49 int32_t after)
{ | 37 int32_t after)
{ |
50 // android_atomic_release_cas returns 0 for success (if *addr == before and
it wrote after). | 38 // android_atomic_release_cas returns 0 for success (if *addr == before and
it wrote after). |
51 return android_atomic_release_cas(before, after, addr) == 0; | 39 return android_atomic_release_cas(before, after, addr) == 0; |
52 } | 40 } |
53 | 41 |
54 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomi
c_conditional_inc() { | 42 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomi
c_conditional_inc() { |
55 //HACK: Android is actually using full memory barriers. | 43 //HACK: Android is actually using full memory barriers. |
56 // Should this change, uncomment below. | 44 // Should this change, uncomment below. |
57 //int dummy; | 45 //int dummy; |
58 //android_atomic_acquire_store(0, &dummy); | 46 //android_atomic_acquire_store(0, &dummy); |
59 } | 47 } |
60 | 48 |
61 #endif | 49 #endif |
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