a64c48f4f9
This fixes two problems: 1) #include SK_SOME_DEFINE doesn't work well for all our clients. 2) Things in include/ are #including things in src/, which we don't like. TBR=reed@google.com BUG=skia: Review URL: https://codereview.chromium.org/862983002
40 lines
979 B
C++
40 lines
979 B
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkBarriers_x86_DEFINED
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#define SkBarriers_x86_DEFINED
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#ifdef SK_BUILD_FOR_WIN
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# include <intrin.h>
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static inline void sk_compiler_barrier() { _ReadWriteBarrier(); }
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#else
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static inline void sk_compiler_barrier() { asm volatile("" : : : "memory"); }
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#endif
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template <typename T>
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T sk_acquire_load(T* ptr) {
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T val = *ptr;
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// On x86, all loads are acquire loads, so we only need a compiler barrier.
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sk_compiler_barrier();
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return val;
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}
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template <typename T>
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T sk_consume_load(T* ptr) {
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// On x86, consume is the same as acquire, i.e. a normal load.
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return sk_acquire_load(ptr);
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}
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template <typename T>
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void sk_release_store(T* ptr, T val) {
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// On x86, all stores are release stores, so we only need a compiler barrier.
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sk_compiler_barrier();
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*ptr = val;
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}
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#endif//SkBarriers_x86_DEFINED
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