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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef COMPTR_HXX
#define COMPTR_HXX
#include <sal/types.h>
#include <osl/diagnose.h>
#include <shobjidl.h>
template< class T_INTERFACE ,
REFIID P_IID = IID_NULL ,
REFCLSID P_CLSID = CLSID_NULL >
class ComPtr
{
public:
/** initialize com ptr with null.
*/
ComPtr()
{
m_pInterface = NULL;
}
/** initialize com ptr with given interface.
*/
ComPtr(T_INTERFACE* pInterface)
{
m_pInterface = pInterface;
if (m_pInterface)
m_pInterface->AddRef();
}
/** copy ctor.
*/
ComPtr(const ComPtr< T_INTERFACE, P_IID, P_CLSID >& aCopy)
{
m_pInterface = aCopy.m_pInterface;
if (m_pInterface)
m_pInterface->AddRef();
}
/** initialize object by quering external object for the right interface.
*/
ComPtr(IUnknown* pIUnknown)
{
if (pIUnknown)
pIUnknown->QueryInterface(P_IID, (void**)&m_pInterface);
}
/** deinitialize com object right.
*/
~ComPtr()
{
release();
}
public:
HRESULT create()
{
return CoCreateInstance(P_CLSID, NULL, CLSCTX_ALL, P_IID, (void**)&m_pInterface);
}
operator T_INTERFACE*() const
{
return m_pInterface;
}
T_INTERFACE& operator*() const
{
return *m_pInterface;
}
T_INTERFACE** operator&()
{
return &m_pInterface;
}
T_INTERFACE* operator->() const
{
return m_pInterface;
}
T_INTERFACE* operator=(T_INTERFACE* pInterface)
{
if ( equals(pInterface) )
return m_pInterface;
m_pInterface->Release();
m_pInterface = pInterface;
if (m_pInterface)
m_pInterface->AddRef();
return m_pInterface;
}
T_INTERFACE* operator=(IUnknown* pIUnknown)
{
if (pIUnknown)
pIUnknown->QueryInterface(P_IID, (void**)&m_pInterface);
return m_pInterface;
}
T_INTERFACE* operator=(const ComPtr< T_INTERFACE, P_IID, P_CLSID >& aCopy)
{
m_pInterface = aCopy.m_pInterface;
if (m_pInterface)
m_pInterface->AddRef();
return m_pInterface;
}
T_INTERFACE* get() const
{
return m_pInterface;
}
void attach(T_INTERFACE* pInterface)
{
if (pInterface)
{
m_pInterface->Release();
m_pInterface = pInterface;
}
}
T_INTERFACE* detach()
{
T_INTERFACE* pInterface = m_pInterface;
m_pInterface = NULL;
return pInterface;
}
void release()
{
if (m_pInterface)
{
m_pInterface->Release();
m_pInterface = NULL;
}
}
#ifndef __MINGW32__
template< class T_QUERYINTERFACE >
HRESULT query(T_QUERYINTERFACE** pQuery)
{
return m_pInterface->QueryInterface(__uuidof(T_QUERYINTERFACE), (void**)pQuery);
}
#endif
HRESULT query(REFIID rIID ,
void** pQuery)
{
return m_pInterface->QueryInterface(rIID, pQuery);
}
HRESULT unknown(IUnknown** pQuery)
{
return m_pInterface->QueryInterface(IID_IUnknown, (void**)pQuery);
}
sal_Bool equals(IUnknown* pCheck)
{
if (
( ! m_pInterface ) &&
( ! pCheck )
)
return sal_True;
IUnknown* pCurrent = NULL;
m_pInterface->QueryInterface(IID_IUnknown, (void**)&pCurrent);
sal_Bool bEquals = (pCheck == pCurrent);
pCurrent->Release();
return bEquals;
}
sal_Bool is()
{
return (m_pInterface != 0);
}
private:
T_INTERFACE* m_pInterface;
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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