You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
1.9 KiB
75 lines
1.9 KiB
/*
|
|
*
|
|
* Copyright (c) 1998,1999 Microsoft Corporation. All rights reserved.
|
|
* EXEMPT: copyright change only, no build required
|
|
*
|
|
*/
|
|
#ifndef _UNKNOWN_HXX
|
|
#define _UNKNOWN_HXX
|
|
#pragma once
|
|
|
|
#include "fusionlastwin32error.h"
|
|
|
|
//===========================================================================
|
|
// This template implements the IUnknown portion of a given COM interface.
|
|
|
|
template <class I, const IID* I_IID> class _unknown : public I
|
|
{
|
|
private: long _refcount;
|
|
|
|
public:
|
|
_unknown() : _refcount(0)
|
|
{
|
|
}
|
|
|
|
virtual ~_unknown()
|
|
{
|
|
}
|
|
|
|
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void ** ppvObject)
|
|
{
|
|
if (ppvObject == NULL)
|
|
return E_POINTER;
|
|
else
|
|
*ppvObject = NULL;
|
|
|
|
if (riid == IID_IUnknown)
|
|
{
|
|
*ppvObject = static_cast<IUnknown*>(this);
|
|
}
|
|
else if (riid == *I_IID)
|
|
{
|
|
*ppvObject = static_cast<I*>(this);
|
|
}
|
|
|
|
if (*ppvObject)
|
|
{
|
|
reinterpret_cast<IUnknown*>(*ppvObject)->AddRef();
|
|
return S_OK;
|
|
}
|
|
else
|
|
{
|
|
return E_NOINTERFACE;
|
|
}
|
|
}
|
|
|
|
virtual ULONG STDMETHODCALLTYPE AddRef( void)
|
|
{
|
|
return InterlockedIncrement(&_refcount);
|
|
}
|
|
|
|
virtual ULONG STDMETHODCALLTYPE Release( void)
|
|
{
|
|
DWORD dwError = ::FusionpGetLastWin32Error();
|
|
if (InterlockedDecrement(&_refcount) == 0)
|
|
{
|
|
delete this;
|
|
::FusionpSetLastWin32Error( dwError );
|
|
return 0;
|
|
}
|
|
::FusionpSetLastWin32Error( dwError );
|
|
return _refcount;
|
|
}
|
|
};
|
|
|
|
#endif _UNKNOWN_HXX
|