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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBarriers_x86_DEFINED
#define SkBarriers_x86_DEFINED
#ifdef SK_BUILD_FOR_WIN
# include <intrin.h>
static inline void sk_compiler_barrier() { _ReadWriteBarrier(); }
#else
static inline void sk_compiler_barrier() { asm volatile("" : : : "memory"); }
#endif
template <typename T>
T sk_acquire_load(T* ptr) {
T val = *ptr;
// On x86, all loads are acquire loads, so we only need a compiler barrier.
sk_compiler_barrier();
return val;
}
template <typename T>
T sk_consume_load(T* ptr) {
// On x86, consume is the same as acquire, i.e. a normal load.
return sk_acquire_load(ptr);
}
template <typename T>
void sk_release_store(T* ptr, T val) {
// On x86, all stores are release stores, so we only need a compiler barrier.
sk_compiler_barrier();
*ptr = val;
}
#endif//SkBarriers_x86_DEFINED
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