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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkAtomics_none_DEFINED
#define SkAtomics_none_DEFINED
/** Non-atomic atomics for uniprocessor systems. */
#include <stdint.h>
static inline int32_t sk_atomic_inc(int32_t* addr) {
int32_t value = *addr;
*addr = value + 1;
return value;
}
static inline int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
int32_t value = *addr;
*addr = value + inc;
return value;
}
static inline int32_t sk_atomic_dec(int32_t* addr) {
int32_t value = *addr;
*addr = value - 1;
return value;
}
static inline void sk_membar_acquire__after_atomic_dec() { }
static inline int32_t sk_atomic_conditional_inc(int32_t* addr) {
int32_t value = *addr;
if (value != 0) ++*addr;
return value;
}
static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) {
if (*addr != before) return false;
*addr = after;
return true;
}
static inline void sk_membar_acquire__after_atomic_conditional_inc() { }
#endif
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