1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/ports/SkAtomics_none.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,49 @@
1.4 +/*
1.5 + * Copyright 2013 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkAtomics_none_DEFINED
1.12 +#define SkAtomics_none_DEFINED
1.13 +
1.14 +/** Non-atomic atomics for uniprocessor systems. */
1.15 +
1.16 +#include <stdint.h>
1.17 +
1.18 +static inline int32_t sk_atomic_inc(int32_t* addr) {
1.19 + int32_t value = *addr;
1.20 + *addr = value + 1;
1.21 + return value;
1.22 +}
1.23 +
1.24 +static inline int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
1.25 + int32_t value = *addr;
1.26 + *addr = value + inc;
1.27 + return value;
1.28 +}
1.29 +
1.30 +static inline int32_t sk_atomic_dec(int32_t* addr) {
1.31 + int32_t value = *addr;
1.32 + *addr = value - 1;
1.33 + return value;
1.34 +}
1.35 +
1.36 +static inline void sk_membar_acquire__after_atomic_dec() { }
1.37 +
1.38 +static inline int32_t sk_atomic_conditional_inc(int32_t* addr) {
1.39 + int32_t value = *addr;
1.40 + if (value != 0) ++*addr;
1.41 + return value;
1.42 +}
1.43 +
1.44 +static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) {
1.45 + if (*addr != before) return false;
1.46 + *addr = after;
1.47 + return true;
1.48 +}
1.49 +
1.50 +static inline void sk_membar_acquire__after_atomic_conditional_inc() { }
1.51 +
1.52 +#endif
