cunknown.h
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/* akvirtualcamera, virtual camera for Mac and Windows.
* Copyright (C) 2020 Gonzalo Exequiel Pedone
*
* akvirtualcamera is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* akvirtualcamera 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with akvirtualcamera. If not, see <http://www.gnu.org/licenses/>.
*
* Web-Site: http://webcamoid.github.io/
*/
#ifndef CUNKNOWN_H
#define CUNKNOWN_H
#include <unknwnbase.h>
namespace AkVCam
{
class CUnknownPrivate;
class CUnknown: public IUnknown
{
public:
CUnknown(CUnknown *parent, REFIID parentCLSID);
virtual ~CUnknown();
void setParent(CUnknown *parent, const IID *parentCLSID=nullptr);
ULONG ref() const;
// IUnknown
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid,
void **ppvObject);
ULONG STDMETHODCALLTYPE AddRef();
ULONG STDMETHODCALLTYPE Release();
private:
CUnknownPrivate *d;
};
}
#define DECLARE_IUNKNOWN_Q(interfaceIid) \
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, \
void **ppvObject) \
{ \
if (!ppvObject) \
return E_POINTER; \
\
*ppvObject = nullptr; \
\
if (IsEqualIID(riid, interfaceIid)) { \
this->AddRef(); \
*ppvObject = this; \
\
return S_OK; \
} \
\
return CUnknown::QueryInterface(riid, ppvObject); \
}
#define DECLARE_IUNKNOWN_R \
ULONG STDMETHODCALLTYPE Release() \
{ \
auto result = CUnknown::Release(); \
\
if (!result) \
delete this; \
\
return result; \
}
#define DECLARE_IUNKNOWN_NQR \
ULONG ref() const \
{ \
return CUnknown::ref(); \
} \
\
void setParent(CUnknown *parent, const IID *parentCLSID=nullptr) \
{ \
return CUnknown::setParent(parent, parentCLSID); \
} \
\
ULONG STDMETHODCALLTYPE AddRef() \
{ \
return CUnknown::AddRef(); \
}
#define DECLARE_IUNKNOWN_NQ \
DECLARE_IUNKNOWN_NQR \
DECLARE_IUNKNOWN_R
#define DECLARE_IUNKNOWN_NR(interfaceIid) \
DECLARE_IUNKNOWN_NQR \
DECLARE_IUNKNOWN_Q(interfaceIid)
#define DECLARE_IUNKNOWN(interfaceIid) \
DECLARE_IUNKNOWN_NQR \
DECLARE_IUNKNOWN_Q(interfaceIid) \
DECLARE_IUNKNOWN_R
#endif // CUNKNOWN_H