creditobjectfactory.cpp

来自「Visual_C++[1].NET_Bible1 Visual_C++宝典书中」· C++ 代码 · 共 70 行

// CreditObjectFactory.cpp
#include "stdafx.h"
#include "CreditServer_h.h"
#include "CreditObject.h"
#include "CreditObjectFactory.h"

CCreditObjectFactory::CCreditObjectFactory() : m_refCount(1) {}

// IUnknown
HRESULT __stdcall CCreditObjectFactory::QueryInterface(
	const IID& riid, void** ppv) 
{
	if (riid == IID_IUnknown || riid == IID_IClassFactory) 
		*ppv = static_cast<IClassFactory*>(this);
	else 
	{
		*ppv = NULL;
		return E_NOINTERFACE;
	}
	static_cast<IUnknown*>(*ppv)->AddRef();
	return S_OK;
}

ULONG __stdcall CCreditObjectFactory::AddRef(void) 
{ 
	return InterlockedIncrement(&m_refCount); 
}

ULONG __stdcall CCreditObjectFactory::Release(void) 
{
	if (InterlockedDecrement(&m_refCount) == 0) 
	{
		delete this;
		return 0;
	}
	return m_refCount;
}

// IClassFactory
HRESULT STDMETHODCALLTYPE CCreditObjectFactory::CreateInstance(
	IUnknown * pUnkOuter, REFIID riid, void ** ppv)
{
	CCreditVerification * pCV;
	HRESULT hr;

	if (NULL == ppv)
		return E_INVALIDARG;
	*ppv = NULL;

	if (NULL != pUnkOuter) 
		return CLASS_E_NOAGGREGATION;

	pCV = new CCreditVerification;
	if (NULL == pCV)
		return E_OUTOFMEMORY;

	hr = pCV->QueryInterface(riid, ppv);
	if (FAILED(hr))
		delete pCV;

	pCV->Release();
	return hr;
}

HRESULT __stdcall CCreditObjectFactory::LockServer (BOOL bLock) 
{ 
	return S_OK; 
}