mirror of https://github.com/PCSX2/pcsx2.git
86 lines
1.5 KiB
C++
86 lines
1.5 KiB
C++
// SPDX-FileCopyrightText: 2002-2023 PCSX2 Dev Team
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// SPDX-License-Identifier: LGPL-3.0+
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#ifndef __OBJC__
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#error This header is for use with Objective-C++ only.
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#endif
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#if __has_feature(objc_arc)
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#error This file is for manual reference counting! Compile without -fobjc-arc
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#endif
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#pragma once
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#include <cstddef>
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#include <utility>
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/// Managed Obj-C pointer
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template <typename T>
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class MRCOwned
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{
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T ptr;
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MRCOwned(T ptr): ptr(ptr) {}
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public:
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MRCOwned(): ptr(nullptr) {}
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MRCOwned(std::nullptr_t): ptr(nullptr) {}
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MRCOwned(MRCOwned&& other)
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: ptr(other.ptr)
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{
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other.ptr = nullptr;
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}
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MRCOwned(const MRCOwned& other)
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: ptr(other.ptr)
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{
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[ptr retain];
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}
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~MRCOwned()
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{
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if (ptr)
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[ptr release];
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}
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operator T() const { return ptr; }
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MRCOwned& operator=(const MRCOwned& other)
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{
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[other.ptr retain];
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if (ptr)
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[ptr release];
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ptr = other.ptr;
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return *this;
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}
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MRCOwned& operator=(MRCOwned&& other)
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{
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std::swap(ptr, other.ptr);
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return *this;
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}
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void Reset()
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{
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[ptr release];
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ptr = nullptr;
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}
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T Get() const { return ptr; }
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static MRCOwned Transfer(T ptr)
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{
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return MRCOwned(ptr);
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}
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static MRCOwned Retain(T ptr)
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{
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[ptr retain];
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return MRCOwned(ptr);
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}
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};
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/// Take ownership of an Obj-C pointer (equivalent to __bridge_transfer)
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template<typename T>
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static inline MRCOwned<T> MRCTransfer(T ptr)
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{
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return MRCOwned<T>::Transfer(ptr);
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}
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/// Retain an Obj-C pointer (equivalent to __bridge)
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template<typename T>
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static inline MRCOwned<T> MRCRetain(T ptr)
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{
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return MRCOwned<T>::Retain(ptr);
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}
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