77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
/*
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Copyright 2021 flyinghead
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <utility>
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template<typename T>
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class ComPtr
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{
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public:
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ComPtr() = default;
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ComPtr(const ComPtr& other) : ptr(other.ptr) {
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if (ptr != nullptr)
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ptr->AddRef();
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}
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ComPtr(ComPtr&& other) noexcept {
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std::swap(ptr, other.ptr);
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}
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~ComPtr() {
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if (ptr != nullptr)
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ptr->Release();
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}
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ComPtr& operator=(const ComPtr& other) {
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if (this != &other)
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*this = ComPtr(other);
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return *this;
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}
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ComPtr& operator=(ComPtr&& other) noexcept {
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std::swap(ptr, other.ptr);
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return *this;
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}
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T* operator->() const noexcept {
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return ptr;
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}
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explicit operator bool() const noexcept {
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return ptr != nullptr;
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}
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operator T*() const noexcept {
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return ptr;
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}
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T*& get() noexcept {
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return ptr;
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}
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void reset(T *ptr = nullptr) {
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if (ptr == this->ptr)
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return;
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std::swap(this->ptr, ptr);
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if (ptr != nullptr)
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ptr->Release();
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}
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template<typename I>
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HRESULT as(ComPtr<I>& p) const {
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return ptr->QueryInterface(IID_PPV_ARGS(&p.get()));
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}
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private:
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T *ptr = nullptr;
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};
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