🛠️🐜 Antkeeper superbuild with dependencies included
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68 lines
1.6 KiB
68 lines
1.6 KiB
#ifndef COMMON_COMPTR_H
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#define COMMON_COMPTR_H
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#include <cstddef>
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#include <utility>
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#include "opthelpers.h"
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template<typename T>
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class ComPtr {
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T *mPtr{nullptr};
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public:
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ComPtr() noexcept = default;
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ComPtr(const ComPtr &rhs) : mPtr{rhs.mPtr} { if(mPtr) mPtr->AddRef(); }
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ComPtr(ComPtr&& rhs) noexcept : mPtr{rhs.mPtr} { rhs.mPtr = nullptr; }
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ComPtr(std::nullptr_t) noexcept { }
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explicit ComPtr(T *ptr) noexcept : mPtr{ptr} { }
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~ComPtr() { if(mPtr) mPtr->Release(); }
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ComPtr& operator=(const ComPtr &rhs)
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{
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if(!rhs.mPtr)
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{
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if(mPtr)
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mPtr->Release();
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mPtr = nullptr;
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}
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else
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{
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rhs.mPtr->AddRef();
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try {
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if(mPtr)
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mPtr->Release();
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mPtr = rhs.mPtr;
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}
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catch(...) {
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rhs.mPtr->Release();
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throw;
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}
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}
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return *this;
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}
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ComPtr& operator=(ComPtr&& rhs)
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{
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if(likely(&rhs != this))
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{
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if(mPtr) mPtr->Release();
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mPtr = std::exchange(rhs.mPtr, nullptr);
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}
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return *this;
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}
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explicit operator bool() const noexcept { return mPtr != nullptr; }
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T& operator*() const noexcept { return *mPtr; }
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T* operator->() const noexcept { return mPtr; }
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T* get() const noexcept { return mPtr; }
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T** getPtr() noexcept { return &mPtr; }
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T* release() noexcept { return std::exchange(mPtr, nullptr); }
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void swap(ComPtr &rhs) noexcept { std::swap(mPtr, rhs.mPtr); }
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void swap(ComPtr&& rhs) noexcept { std::swap(mPtr, rhs.mPtr); }
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};
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#endif
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