93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
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/******************************************************************************
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Copyright (c) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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******************************************************************************/
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#pragma once
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template<typename T> class ComPtr {
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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(NULL) {}
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inline ComPtr(T *p) : ptr(p) {if (ptr) ptr->AddRef();}
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inline ComPtr(const ComPtr &c) : ptr(c.ptr) {if (ptr) ptr->AddRef();}
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inline ComPtr(ComPtr &&c) : ptr(c.ptr) {c.ptr = NULL;}
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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 = NULL;
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}
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}
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inline ComPtr &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 &operator=(const ComPtr &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 &operator=(ComPtr &&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 = NULL;
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}
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return *this;
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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 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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