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/* This file is part of the KDE project. |
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|
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Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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|
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This library is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation, either version 2.1 or 3 of the License. |
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|
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This library 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 Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public License |
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along with this library. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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|
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#ifndef PHONON_COMPOINTER_H |
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#define PHONON_COMPOINTER_H |
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|
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#include <windows.h> |
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#include <dshow.h> |
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|
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QT_BEGIN_NAMESPACE |
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|
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namespace Phonon |
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{ |
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namespace DS9 |
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{ |
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template<class T> class ComPointer |
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{ |
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public: |
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explicit ComPointer(T *t = 0) : m_t(t) |
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{ |
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} |
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|
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explicit ComPointer( const IID &clsid, const IID &iid) : m_t(0) |
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{ |
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::CoCreateInstance(clsid, 0, CLSCTX_INPROC_SERVER, iid, |
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reinterpret_cast<void**>(&m_t)); |
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} |
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|
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explicit ComPointer(IUnknown *_unk, const GUID &guid) : m_t(0) |
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{ |
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if (_unk) { |
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_unk->QueryInterface(guid, reinterpret_cast<void**>(&m_t)); |
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} |
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} |
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|
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ComPointer(const ComPointer<T> &other) : m_t(other.m_t) |
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{ |
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if (m_t) { |
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m_t->AddRef(); |
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} |
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} |
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|
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ComPointer<T> &operator=(const ComPointer<T> &other) |
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{ |
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if (other.m_t) { |
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other.m_t->AddRef(); |
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} |
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if (m_t) { |
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m_t->Release(); |
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} |
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m_t = other.m_t; |
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return *this; |
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} |
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|
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T *operator->() const |
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{ |
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return m_t; |
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} |
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|
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operator T*() const |
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{ |
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return m_t; |
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} |
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|
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//the following method first reinitialize their value to avoid mem leaks |
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T ** pparam() |
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{ |
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if (m_t) { |
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m_t->Release(); |
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m_t = 0; |
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} |
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return &m_t; |
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} |
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|
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bool operator==(const ComPointer<T> &other) const |
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{ |
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return m_t == other.m_t; |
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} |
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|
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bool operator!=(const ComPointer<T> &other) const |
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{ |
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return m_t != other.m_t; |
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} |
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|
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~ComPointer() |
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{ |
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if (m_t) { |
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m_t->Release(); |
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} |
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} |
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|
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private: |
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T *m_t; |
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}; |
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} |
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} |
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|
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QT_END_NAMESPACE |
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|
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#endif |
