Re: Design of array for holding interface pointer
aeshiels@gmail.com wrote:
Im writing a COM interface which will hold an array of my IItem3
interface pointers.
std::vector < CAdapt< CComPtr<IItem3> > > m_aItems;
STDMETHODIMP CMyArray::putItem(IItem3 *pVal)
{
USES_CONVERSION;
CComPtr<IItem3> item3;
HRESULT hr = pVal->QueryInterface(__uuidof(IItem3),
(void**)&item3);
if(FAILED(hr))
return hr;
m_aItems.push_back (item3);
return S_OK;
}
Your code is correct but way overcomplicated. Just do
m_aItems.push_back (pVal);
STDMETHODIMP CMyArray::getItem(IItem3 * * pVal)
{
if (m_aItems.size() == 0)
return E_FAIL;
CComPtr <IItem3> item3 = ( CComPtr<IItem3> )m_aItems.front ();
HRESULT hr = item3->QueryInterface(__uuidof(IItem3),
(void**)pVal);
if(FAILED(hr))
return hr;
Again, too complicated. Make it
HRESULT hr = m_aItems.front().m_T.CopyTo(pVal);
m_aItems.pop_back();
This looks suspicious. You are returning an element from the front of
the vector, but popping from the back. Is this really what you want?
--
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