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
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*
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* Copyright 2013 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 SkAtomics_win_DEFINED
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#define SkAtomics_win_DEFINED
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/** Windows Interlocked atomics. */
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#include <intrin.h>
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#include <stdint.h>
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//MSDN says in order to declare an interlocked function for use as an
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//intrinsic, include intrin.h and put the function in a #pragma intrinsic
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//directive.
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//The pragma appears to be unnecessary, but doesn't hurt.
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#pragma intrinsic(_InterlockedIncrement, _InterlockedExchangeAdd, _InterlockedDecrement)
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#pragma intrinsic(_InterlockedCompareExchange)
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static inline int32_t sk_atomic_inc(int32_t* addr) {
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// InterlockedIncrement returns the new value, we want to return the old.
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return _InterlockedIncrement(reinterpret_cast<long*>(addr)) - 1;
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}
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static inline int64_t sk_atomic_inc(int64_t* addr) {
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// InterlockedIncrement returns the new value, we want to return the old.
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return InterlockedIncrement64(addr) - 1;
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}
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static inline int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
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return _InterlockedExchangeAdd(reinterpret_cast<long*>(addr), static_cast<long>(inc));
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}
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static inline int32_t sk_atomic_dec(int32_t* addr) {
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// InterlockedDecrement returns the new value, we want to return the old.
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return _InterlockedDecrement(reinterpret_cast<long*>(addr)) + 1;
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}
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static inline void sk_membar_acquire__after_atomic_dec() { }
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static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) {
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return _InterlockedCompareExchange(reinterpret_cast<long*>(addr), after, before) == before;
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}
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static inline void* sk_atomic_cas(void** addr, void* before, void* after) {
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return InterlockedCompareExchangePointer(addr, after, before);
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}
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static inline void sk_membar_acquire__after_atomic_conditional_inc() { }
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#endif
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