propertybag.cpp

Window Mobile Capture with DirectDraw

//
// Copyright (c) Microsoft Corporation.?All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
#include <windows.h>
#include <Ocidl.h>
#include <oleauto.h>

#include "PropertyBag.h"

CPropertyBag::CPropertyBag() : _refCount(1)
{       
}

CPropertyBag::~CPropertyBag()
{
}

HRESULT STDMETHODCALLTYPE
CPropertyBag::Read(LPCOLESTR pszPropName, 
                       VARIANT *pVar, 
                       IErrorLog *pErrorLog)
{
	if(pVar == NULL)
		return E_INVALIDARG;

	CComBSTR bstrPropName = pszPropName;
	CComVariant var = arrProperty.Lookup(bstrPropName);
	*pVar = var;
	var.Detach(pVar);
	return S_OK;
}


HRESULT STDMETHODCALLTYPE
CPropertyBag::Write(LPCOLESTR pszPropName, 
                            VARIANT *pVar)
{
	if(pVar == NULL || pszPropName == NULL)
		return E_INVALIDARG;

	CComBSTR bstrPropName = pszPropName;
	arrProperty.Add(bstrPropName, CComVariant(*pVar));
	return S_OK;
}

ULONG STDMETHODCALLTYPE 
CPropertyBag::AddRef() 
{
    return InterlockedIncrement((LONG *)&_refCount);
}

ULONG STDMETHODCALLTYPE 
CPropertyBag::Release() 
{
    ASSERT(_refCount != 0xFFFFFFFF);
    ULONG ret = InterlockedDecrement((LONG *)&_refCount);    
    if(!ret) 
        delete this; 
    return ret;
}

HRESULT STDMETHODCALLTYPE 
CPropertyBag::QueryInterface(REFIID riid, void** ppv) 
{
    if(!ppv) 
        return E_POINTER;
    if(riid == IID_IPropertyBag) 
        *ppv = static_cast<IPropertyBag*>(this);	
    else 
        return *ppv = 0, E_NOINTERFACE;
    
    return AddRef(), S_OK;	
}