| OLD | NEW |
| 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 |
| 11 /** Android framework atomics. */ | 11 /** Android framework atomics. */ |
| 12 | 12 |
| 13 #include <cutils/atomic.h> | 13 #include <cutils/atomic.h> |
| 14 #include <stdint.h> | 14 #include <stdint.h> |
| 15 | 15 |
| 16 #define sk_atomic_inc(addr) android_atomic_inc(addr) | 16 static inline __attribute__((always_inline)) int32_t sk_atomic_inc(int32_t* addr
) { |
| 17 #define sk_atomic_add(addr, inc) android_atomic_add(inc, addr) | 17 return android_atomic_inc(addr); |
| 18 #define sk_atomic_dec(addr) android_atomic_dec(addr) | 18 } |
| 19 |
| 20 static inline __attribute__((always_inline)) int32_t sk_atomic_add(int32_t* addr
, int32_t inc) { |
| 21 return android_atomic_add(inc, addr); |
| 22 } |
| 23 |
| 24 static inline __attribute__((always_inline)) int32_t sk_atomic_dec(int32_t* addr
) { |
| 25 return android_atomic_dec(addr); |
| 26 } |
| 19 | 27 |
| 20 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() { |
| 21 //HACK: Android is actually using full memory barriers. | 29 //HACK: Android is actually using full memory barriers. |
| 22 // Should this change, uncomment below. | 30 // Should this change, uncomment below. |
| 23 //int dummy; | 31 //int dummy; |
| 24 //android_atomic_acquire_store(0, &dummy); | 32 //android_atomic_acquire_store(0, &dummy); |
| 25 } | 33 } |
| 26 | 34 |
| 27 static inline __attribute__((always_inline)) int32_t sk_atomic_conditional_inc(i
nt32_t* addr) { | 35 static inline __attribute__((always_inline)) int32_t sk_atomic_conditional_inc(i
nt32_t* addr) { |
| 28 while (true) { | 36 while (true) { |
| 29 int32_t value = *addr; | 37 int32_t value = *addr; |
| 30 if (value == 0) { | 38 if (value == 0) { |
| 31 return 0; | 39 return 0; |
| 32 } | 40 } |
| 33 if (0 == android_atomic_release_cas(value, value + 1, addr)) { | 41 if (0 == android_atomic_release_cas(value, value + 1, addr)) { |
| 34 return value; | 42 return value; |
| 35 } | 43 } |
| 36 } | 44 } |
| 37 } | 45 } |
| 38 | 46 |
| 39 static inline __attribute___((always_inline)) bool sk_atomic_cas(int32_t* addr, | 47 static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr, |
| 40 int32_t before, | 48 int32_t before, |
| 41 int32_t after)
{ | 49 int32_t after)
{ |
| 42 // android_atomic_release_cas returns 0 for success (if *addr == before and
it wrote after). | 50 // android_atomic_release_cas returns 0 for success (if *addr == before and
it wrote after). |
| 43 return android_atomic_release_cas(before, after, addr) == 0; | 51 return android_atomic_release_cas(before, after, addr) == 0; |
| 44 } | 52 } |
| 45 | 53 |
| 46 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomi
c_conditional_inc() { | 54 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomi
c_conditional_inc() { |
| 47 //HACK: Android is actually using full memory barriers. | 55 //HACK: Android is actually using full memory barriers. |
| 48 // Should this change, uncomment below. | 56 // Should this change, uncomment below. |
| 49 //int dummy; | 57 //int dummy; |
| 50 //android_atomic_acquire_store(0, &dummy); | 58 //android_atomic_acquire_store(0, &dummy); |
| 51 } | 59 } |
| 52 | 60 |
| 53 #endif | 61 #endif |
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