141 lines
2.9 KiB
C++
141 lines
2.9 KiB
C++
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/*
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* Copyright (c) 2013 Hugh Bailey <obs.jim@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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/* Oh no I have my own com pointer class, the world is ending, how dare you
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* write your own! */
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template<class T> class ComPtr {
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protected:
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T *ptr;
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inline void Kill()
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{
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if (ptr)
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ptr->Release();
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}
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inline void Replace(T *p)
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{
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if (ptr != p) {
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if (p) p->AddRef();
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if (ptr) ptr->Release();
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ptr = p;
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}
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}
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public:
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inline ComPtr() : ptr(nullptr) {}
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inline ComPtr(T *p) : ptr(p) {if (ptr) ptr->AddRef();}
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inline ComPtr(const ComPtr<T> &c) : ptr(c.ptr) {if (ptr) ptr->AddRef();}
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inline ComPtr(ComPtr<T> &&c) : ptr(c.ptr) {c.ptr = nullptr;}
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inline ~ComPtr() {Kill();}
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inline void Clear()
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{
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if (ptr) {
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ptr->Release();
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ptr = nullptr;
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}
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}
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inline ComPtr<T> &operator=(T *p)
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{
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Replace(p);
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return *this;
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}
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inline ComPtr<T> &operator=(const ComPtr<T> &c)
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{
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Replace(c.ptr);
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return *this;
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}
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inline ComPtr<T> &operator=(ComPtr<T> &&c)
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{
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if (this != &c) {
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Kill();
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ptr = c.ptr;
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c.ptr = nullptr;
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}
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return *this;
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}
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inline T *Detach()
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{
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T *out = ptr;
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ptr = nullptr;
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return out;
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}
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inline void CopyTo(T **out)
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{
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if (out) {
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if (ptr) ptr->AddRef();
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*out = ptr;
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}
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}
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inline ULONG Release()
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{
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ULONG ref;
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if (!ptr) return 0;
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ref = ptr->Release();
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ptr = nullptr;
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return ref;
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}
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inline T **Assign() {Clear(); return &ptr;}
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inline void Set(T *p) {Kill(); ptr = p;}
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inline T *Get() const {return ptr;}
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inline T **operator&() {return Assign();}
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inline operator T*() const {return ptr;}
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inline T *operator->() const {return ptr;}
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inline bool operator==(T *p) const {return ptr == p;}
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inline bool operator!=(T *p) const {return ptr != p;}
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inline bool operator!() const {return !ptr;}
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};
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#ifdef _WIN32
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template<class T> class ComQIPtr : public ComPtr<T> {
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public:
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inline ComQIPtr(IUnknown *unk)
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{
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this->ptr = nullptr;
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unk->QueryInterface(__uuidof(T), (void**)&this->ptr);
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}
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inline ComPtr<T> &operator=(IUnknown *unk)
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{
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ComPtr<T>::Clear();
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unk->QueryInterface(__uuidof(T), (void**)&this->ptr);
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return *this;
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}
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};
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#endif
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