mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-14 17:16:36 +00:00
111 lines
No EOL
3.8 KiB
C++
111 lines
No EOL
3.8 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours/common.hpp>
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#include <vapours/assert.hpp>
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namespace ams::util {
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namespace impl {
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template<typename T>
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struct AtomicIntegerStorage;
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template<typename T> requires (sizeof(T) == sizeof(u8))
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struct AtomicIntegerStorage<T> {
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using Type = u8;
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};
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template<typename T> requires (sizeof(T) == sizeof(u16))
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struct AtomicIntegerStorage<T> {
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using Type = u16;
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};
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template<typename T> requires (sizeof(T) == sizeof(u32))
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struct AtomicIntegerStorage<T> {
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using Type = u32;
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};
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template<typename T> requires (sizeof(T) == sizeof(u64))
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struct AtomicIntegerStorage<T> {
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using Type = u64;
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};
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template<typename T>
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concept UsableAtomicType = (sizeof(T) <= sizeof(u64)) && !std::is_const<T>::value && !std::is_volatile<T>::value && (std::is_pointer<T>::value || requires (const T &t) {
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std::bit_cast<typename AtomicIntegerStorage<T>::Type, T>(t);
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});
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}
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template<impl::UsableAtomicType T>
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class Atomic {
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NON_COPYABLE(Atomic);
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NON_MOVEABLE(Atomic);
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private:
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static_assert(std::atomic<T>::is_always_lock_free);
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private:
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std::atomic<T> m_v;
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public:
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ALWAYS_INLINE explicit Atomic() { /* ... */ }
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constexpr ALWAYS_INLINE explicit Atomic(T v) : m_v(v) { /* ... */ }
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ALWAYS_INLINE T operator=(T desired) {
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return (m_v = desired);
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}
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template<std::memory_order Order = std::memory_order_seq_cst>
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ALWAYS_INLINE T Load() const {
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return m_v.load(Order);
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}
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template<std::memory_order Order = std::memory_order_seq_cst>
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ALWAYS_INLINE void Store(T arg) {
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return m_v.store(Order);
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}
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template<std::memory_order Order>
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ALWAYS_INLINE T Exchange(T arg) {
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return m_v.exchange(arg, Order);
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}
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template<std::memory_order Order>
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ALWAYS_INLINE bool CompareExchangeWeak(T &expected, T desired) {
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return m_v.compare_exchange_weak(expected, desired, Order);
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}
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template<std::memory_order Order>
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ALWAYS_INLINE bool CompareExchangeStrong(T &expected, T desired) {
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return m_v.compare_exchange_strong(expected, desired, Order);
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}
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#define AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION(_OPERATION_, _OPERATION_LOWER_) \
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ALWAYS_INLINE T Fetch ## _OPERATION_(T arg) { \
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return m_v.fetch_##_OPERATION_LOWER_(arg); \
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}
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AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION(Add, add)
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AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION(Sub, sub)
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AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION(And, and)
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AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION(Or, or)
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AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION(Xor, xor)
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#undef AMS_UTIL_IMPL_DEFINE_ATOMIC_FETCH_OPERATE_FUNCTION
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};
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} |