mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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70 lines
3 KiB
C++
70 lines
3 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.hpp>
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namespace ams::fssystem {
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namespace impl {
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template<typename T, size_t Size>
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struct PimplHelper {
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static void Construct(void *);
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static void Destroy(void *);
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};
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}
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template<typename T, size_t Size>
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class Pimpl {
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private:
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#if defined(ATMOSPHERE_OS_HORIZON) || defined(ATMOSPHERE_OS_WINDOWS) || defined(ATMOSPHERE_OS_LINUX)
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static constexpr size_t ExtraSizeToEnsureCompatibility = 0;
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#elif defined(ATMOSPHERE_OS_MACOS)
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static constexpr size_t ExtraSizeToEnsureCompatibility = 0x20;
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#endif
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static constexpr size_t StorageSize = Size + ExtraSizeToEnsureCompatibility;
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private:
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alignas(0x10) u8 m_storage[StorageSize];
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public:
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ALWAYS_INLINE Pimpl() { impl::PimplHelper<T, StorageSize>::Construct(m_storage); }
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ALWAYS_INLINE ~Pimpl() { impl::PimplHelper<T, StorageSize>::Destroy(m_storage); }
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ALWAYS_INLINE T *Get() { return reinterpret_cast<T *>(m_storage + 0); }
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ALWAYS_INLINE T *operator->() { return reinterpret_cast<T *>(m_storage + 0); }
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};
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#define AMS_FSSYSTEM_ENABLE_PIMPL(_CLASSNAME_) \
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namespace ams::fssystem::impl { \
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\
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template<size_t Size> \
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struct PimplHelper<_CLASSNAME_, Size> { \
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static ALWAYS_INLINE void Construct(void *p) { \
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static_assert(sizeof(_CLASSNAME_) <= Size); \
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static_assert(alignof(_CLASSNAME_) <= 0x10); \
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\
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std::construct_at(static_cast<_CLASSNAME_ *>(p)); \
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} \
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\
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static ALWAYS_INLINE void Destroy(void *p) { \
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std::destroy_at(static_cast<_CLASSNAME_ *>(p)); \
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} \
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}; \
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\
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}
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}
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