m_cursor++;
cActual++;
}
else // allocation error, unwind
{
while (cActual > 0)
{
cActual–;
CoTaskMemFree(rgElems[cActual]);
rgElems[cActual] = 0;
}
break;
}
}
Unlock();
if (pcFetched)
*pcFetched = cActual;
return cElems == cActual ? S_OK : S_FALSE;
}
STDMETHODIMP
StatementEnumerator::Skip(ULONG cElems)
{
Lock();
ULONG cActual = 0;
while (cActual < cElems
&& m_cursor != m_pThis->m_statements.end())
{
m_cursor++;
cActual++;
}
Unlock();
return cElems == cActual ? S_OK : S_FALSE;
}
STDMETHODIMP
StatementEnumerator::Reset(void)
{
Lock();
m_cursor = m_pThis->m_statements.begin();
Unlock();
return S_OK;
}
STDMETHODIMP
StatementEnumerator::Clone(IEnumString **ppes)
{
if (ppes == 0)
return E_INVALIDARG;
if (*ppes = new StatementEnumerator(m_pThis))
return S_OK;
return E_OUTOFMEMORY;
}
// class ChatSessionClass /////////////////////
ChatSessionClass::ChatSessionClass(void)
: m_cStrongLocks(0)
{
InitializeCriticalSection(&m_csSessionLock);
}
ChatSessionClass::~ChatSessionClass(void)
{
DeleteCriticalSection(&m_csSessionLock);
}
void
ChatSessionClass::Lock(void)
{
EnterCriticalSection(&m_csSessionLock);
}
void
ChatSessionClass::Unlock(void)
{
LeaveCriticalSection(&m_csSessionLock);
}
// helper method to protect access to DeleteSession
// to only allow COMChat Admins to delete groups
bool
ChatSessionClass::CheckAccess(const OLECHAR *pwszUser)
{
if (wcscmp(pwszUser, L'anonymous') == 0)
return false;
TRUSTEEW trustee = {
0, NO_MULTIPLE_TRUSTEE, TRUSTEE_IS_NAME,
TRUSTEE_IS_USER, const_cast<OLECHAR*>(pwszUser)
};
BOOL bIsAllowed;
HRESULT hr = g_pacAdmins->IsAccessAllowed(&trustee,0,
COM_RIGHTS_EXECUTE,
&bIsAllowed);
if (FAILED(hr))
bIsAllowed = false;
return SUCCEEDED(hr) && bIsAllowed != FALSE;
}
// IUnknown methods
STDMETHODIMP
ChatSessionClass::QueryInterface(REFIID riid, void **ppv)
{
if (riid == IID_IUnknown)
*ppv = static_cast<IChatSessionManager*>(this);
else if (riid == IID_IChatSessionManager)
*ppv = static_cast<IChatSessionManager*>(this);
else if (riid == IID_IExternalConnection)
