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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PHONON_COMPOINTER_H
#define PHONON_COMPOINTER_H
#include <windows.h>
#include <dshow.h>
QT_BEGIN_NAMESPACE
namespace Phonon
{
namespace DS9
{
template<class T> class ComPointer
{
public:
explicit ComPointer(T *t = 0) : m_t(t)
{
}
explicit ComPointer( const IID &clsid, const IID &iid) : m_t(0)
{
::CoCreateInstance(clsid, 0, CLSCTX_INPROC_SERVER, iid,
reinterpret_cast<void**>(&m_t));
}
explicit ComPointer(IUnknown *_unk, const GUID &guid) : m_t(0)
{
if (_unk) {
_unk->QueryInterface(guid, reinterpret_cast<void**>(&m_t));
}
}
ComPointer(const ComPointer<T> &other) : m_t(other.m_t)
{
if (m_t) {
m_t->AddRef();
}
}
ComPointer<T> &operator=(const ComPointer<T> &other)
{
if (other.m_t) {
other.m_t->AddRef();
}
if (m_t) {
m_t->Release();
}
m_t = other.m_t;
return *this;
}
T *operator->() const
{
return m_t;
}
operator T*() const
{
return m_t;
}
//the following method first reinitialize their value to avoid mem leaks
T ** pparam()
{
if (m_t) {
m_t->Release();
m_t = 0;
}
return &m_t;
}
bool operator==(const ComPointer<T> &other) const
{
return m_t == other.m_t;
}
bool operator!=(const ComPointer<T> &other) const
{
return m_t != other.m_t;
}
~ComPointer()
{
if (m_t) {
m_t->Release();
}
}
private:
T *m_t;
};
}
}
QT_END_NAMESPACE
#endif
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