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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkAtomics_atomic_DEFINED
#define SkAtomics_atomic_DEFINED
template <typename T>
T sk_atomic_load(const T* ptr, sk_memory_order mo) {
SkASSERT(mo == sk_memory_order_relaxed ||
mo == sk_memory_order_seq_cst ||
mo == sk_memory_order_acquire ||
mo == sk_memory_order_consume);
return __atomic_load_n(ptr, mo);
}
template <typename T>
void sk_atomic_store(T* ptr, T val, sk_memory_order mo) {
SkASSERT(mo == sk_memory_order_relaxed ||
mo == sk_memory_order_seq_cst ||
mo == sk_memory_order_release);
__atomic_store_n(ptr, val, mo);
}
template <typename T>
T sk_atomic_fetch_add(T* ptr, T val, sk_memory_order mo) {
// All values of mo are valid.
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) {
// All values of success are valid.
SkASSERT(failure == sk_memory_order_relaxed ||
failure == sk_memory_order_seq_cst ||
failure == sk_memory_order_acquire ||
failure == sk_memory_order_consume);
SkASSERT(failure <= success);
return __atomic_compare_exchange_n(ptr, expected, desired, false/*weak?*/, success, failure);
}
template <typename T>
T sk_atomic_exchange(T* ptr, T val, sk_memory_order mo) {
// All values of mo are valid.
return __atomic_exchange_n(ptr, val, mo);
}
#endif//SkAtomics_atomic_DEFINED
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