a669bc7a7a
This merges and refactors SkAtomics.h and SkBarriers.h into SkAtomics.h and some ports/ implementations. The major new feature is that we can express memory orders explicitly rather than only through comments. The porting layer is reduced to four template functions: - sk_atomic_load - sk_atomic_store - sk_atomic_fetch_add - sk_atomic_compare_exchange From those four we can reconstruct all our previous sk_atomic_foo. There are three ports: - SkAtomics_std: uses C++11 <atomic>, used with MSVC - SkAtomics_atomic: uses newer GCC/Clang intrinsics, used on not-MSVC where possible - SkAtomics_sync: uses older GCC/Clang intrinsics, used where SkAtomics_atomic not supported No public API changes. TBR=reed@google.com BUG=skia: Review URL: https://codereview.chromium.org/896553002
27 lines
766 B
C++
27 lines
766 B
C++
#ifndef SkAtomics_atomic_DEFINED
|
|
#define SkAtomics_atomic_DEFINED
|
|
|
|
template <typename T>
|
|
T sk_atomic_load(const T* ptr, sk_memory_order mo) {
|
|
return __atomic_load_n(ptr, mo);
|
|
}
|
|
|
|
template <typename T>
|
|
void sk_atomic_store(T* ptr, T val, sk_memory_order mo) {
|
|
__atomic_store_n(ptr, val, mo);
|
|
}
|
|
|
|
template <typename T>
|
|
T sk_atomic_fetch_add(T* ptr, T val, sk_memory_order mo) {
|
|
return __atomic_fetch_add(ptr, val, mo);
|
|
}
|
|
|
|
template <typename T>
|
|
bool sk_atomic_compare_exchange(T* ptr, T* expected, T desired,
|
|
sk_memory_order success,
|
|
sk_memory_order failure) {
|
|
return __atomic_compare_exchange_n(ptr, expected, desired, false/*weak?*/, success, failure);
|
|
}
|
|
|
|
#endif//SkAtomics_atomic_DEFINED
|