author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 24 Sep 2009 12:53:48 +0300 | |
changeset 11 | c8a366e56285 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2007 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef COMPtr_h |
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#define COMPtr_h |
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#define NOMINMAX |
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#include <guiddef.h> |
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#include <unknwn.h> |
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#include <WTF/Assertions.h> |
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typedef long HRESULT; |
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// FIXME: Should we put this into the WebCore namespace and use "using" on it |
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// as we do with things in WTF? |
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enum AdoptCOMTag { AdoptCOM }; |
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enum QueryTag { Query }; |
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template <typename T> class COMPtr { |
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public: |
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COMPtr() : m_ptr(0) { } |
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COMPtr(T* ptr) : m_ptr(ptr) { if (m_ptr) m_ptr->AddRef(); } |
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COMPtr(AdoptCOMTag, T* ptr) : m_ptr(ptr) { } |
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COMPtr(const COMPtr& o) : m_ptr(o.m_ptr) { if (T* ptr = m_ptr) ptr->AddRef(); } |
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inline COMPtr(QueryTag, IUnknown* ptr) : m_ptr(copyQueryInterfaceRef(ptr)) { } |
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template <typename U> inline COMPtr(QueryTag, const COMPtr<U>& ptr) : m_ptr(copyQueryInterfaceRef(ptr.get())) { } |
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~COMPtr() { if (m_ptr) m_ptr->Release(); } |
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T* get() const { return m_ptr; } |
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T& operator*() const { return *m_ptr; } |
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T* operator->() const { return m_ptr; } |
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T** operator&() { ASSERT(!m_ptr); return &m_ptr; } |
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bool operator!() const { return !m_ptr; } |
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// This conversion operator allows implicit conversion to bool but not to other integer types. |
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typedef T* (COMPtr::*UnspecifiedBoolType)() const; |
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operator UnspecifiedBoolType() const { return m_ptr ? &COMPtr::get : 0; } |
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COMPtr& operator=(const COMPtr&); |
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COMPtr& operator=(T*); |
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template <typename U> COMPtr& operator=(const COMPtr<U>&); |
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void query(IUnknown* ptr) { adoptRef(copyQueryInterfaceRef(ptr)); } |
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template <typename U> inline void query(const COMPtr<U>& ptr) { query(ptr.get()); } |
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HRESULT copyRefTo(T**); |
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void adoptRef(T*); |
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private: |
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static T* copyQueryInterfaceRef(IUnknown*); |
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T* m_ptr; |
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}; |
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template <typename T> inline T* COMPtr<T>::copyQueryInterfaceRef(IUnknown* ptr) |
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{ |
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if (!ptr) |
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return 0; |
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T* result; |
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if (FAILED(ptr->QueryInterface(&result))) |
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return 0; |
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return result; |
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} |
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template <typename T> inline HRESULT COMPtr<T>::copyRefTo(T** ptr) |
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{ |
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if (!ptr) |
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return E_POINTER; |
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*ptr = m_ptr; |
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if (m_ptr) |
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m_ptr->AddRef(); |
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return S_OK; |
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} |
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template <typename T> inline void COMPtr<T>::adoptRef(T *ptr) |
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{ |
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if (m_ptr) |
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m_ptr->Release(); |
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m_ptr = ptr; |
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} |
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|
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template <typename T> inline COMPtr<T>& COMPtr<T>::operator=(const COMPtr<T>& o) |
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{ |
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T* optr = o.get(); |
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if (optr) |
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optr->AddRef(); |
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T* ptr = m_ptr; |
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m_ptr = optr; |
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if (ptr) |
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ptr->Release(); |
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return *this; |
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} |
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|
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template <typename T> template <typename U> inline COMPtr<T>& COMPtr<T>::operator=(const COMPtr<U>& o) |
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{ |
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T* optr = o.get(); |
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if (optr) |
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optr->AddRef(); |
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T* ptr = m_ptr; |
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m_ptr = optr; |
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if (ptr) |
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ptr->Release(); |
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return *this; |
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} |
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|
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template <typename T> inline COMPtr<T>& COMPtr<T>::operator=(T* optr) |
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{ |
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if (optr) |
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optr->AddRef(); |
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T* ptr = m_ptr; |
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m_ptr = optr; |
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if (ptr) |
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ptr->Release(); |
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return *this; |
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} |
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|
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template <typename T, typename U> inline bool operator==(const COMPtr<T>& a, const COMPtr<U>& b) |
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{ |
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return a.get() == b.get(); |
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} |
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|
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template <typename T, typename U> inline bool operator==(const COMPtr<T>& a, U* b) |
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{ |
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return a.get() == b; |
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} |
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|
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template <typename T, typename U> inline bool operator==(T* a, const COMPtr<U>& b) |
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{ |
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return a == b.get(); |
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} |
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|
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template <typename T, typename U> inline bool operator!=(const COMPtr<T>& a, const COMPtr<U>& b) |
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{ |
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return a.get() != b.get(); |
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} |
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|
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template <typename T, typename U> inline bool operator!=(const COMPtr<T>& a, U* b) |
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{ |
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return a.get() != b; |
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} |
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|
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template <typename T, typename U> inline bool operator!=(T* a, const COMPtr<U>& b) |
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{ |
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return a != b.get(); |
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} |
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|
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#endif |