bungeman@google.com | d9947f6 | 2013-12-18 15:27:39 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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_sync_DEFINED |
| 9 | #define SkAtomics_sync_DEFINED |
| 10 | |
| 11 | /** GCC/Clang __sync based atomics. */ |
| 12 | |
| 13 | #include <stdint.h> |
| 14 | |
| 15 | static inline __attribute__((always_inline)) int32_t sk_atomic_inc(int32_t* addr) { |
| 16 | return __sync_fetch_and_add(addr, 1); |
| 17 | } |
| 18 | |
bsalomon | 00a8fae | 2014-07-11 08:42:11 -0700 | [diff] [blame] | 19 | static inline __attribute__((always_inline)) int64_t sk_atomic_inc(int64_t* addr) { |
djsollen | 63f413c | 2014-07-18 07:09:33 -0700 | [diff] [blame] | 20 | #if defined(__mips__) && !defined(__LP64__) && !defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) |
| 21 | /** Some versions of the GCC 32-bit MIPS toolchains (e.g. 4.8) for android are missing |
| 22 | * support for the __sync* functions that operate on 64-bit values. The workaround |
| 23 | * is to use __atomic* functions until we can move everything to <stdatomic.h>. |
Derek Sollenberger | eccbfec | 2014-07-16 15:51:39 -0400 | [diff] [blame] | 24 | */ |
| 25 | return __atomic_fetch_add(addr, 1, __ATOMIC_SEQ_CST); |
| 26 | #else |
bsalomon | 00a8fae | 2014-07-11 08:42:11 -0700 | [diff] [blame] | 27 | return __sync_fetch_and_add(addr, 1); |
Derek Sollenberger | eccbfec | 2014-07-16 15:51:39 -0400 | [diff] [blame] | 28 | #endif |
bsalomon | 00a8fae | 2014-07-11 08:42:11 -0700 | [diff] [blame] | 29 | } |
| 30 | |
bungeman@google.com | d9947f6 | 2013-12-18 15:27:39 +0000 | [diff] [blame] | 31 | static inline __attribute__((always_inline)) int32_t sk_atomic_add(int32_t* addr, int32_t inc) { |
| 32 | return __sync_fetch_and_add(addr, inc); |
| 33 | } |
| 34 | |
| 35 | static inline __attribute__((always_inline)) int32_t sk_atomic_dec(int32_t* addr) { |
| 36 | return __sync_fetch_and_add(addr, -1); |
| 37 | } |
| 38 | |
| 39 | static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_dec() { } |
| 40 | |
commit-bot@chromium.org | 4b5fba5 | 2014-01-08 21:15:56 +0000 | [diff] [blame] | 41 | static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr, |
| 42 | int32_t before, |
| 43 | int32_t after) { |
| 44 | return __sync_bool_compare_and_swap(addr, before, after); |
| 45 | } |
| 46 | |
commit-bot@chromium.org | 81496fb | 2014-05-28 21:43:59 +0000 | [diff] [blame] | 47 | static inline __attribute__((always_inline)) void* sk_atomic_cas(void** addr, |
| 48 | void* before, |
| 49 | void* after) { |
| 50 | return __sync_val_compare_and_swap(addr, before, after); |
| 51 | } |
| 52 | |
bungeman@google.com | d9947f6 | 2013-12-18 15:27:39 +0000 | [diff] [blame] | 53 | static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_conditional_inc() { } |
| 54 | |
| 55 | #endif |