CQueue::OnCreateFile(
/*[in]*/ IWDFIoQueue* pQueue,
/*[in]*/ IWDFIoRequest* pRequest,
/*[in]*/ IWDFFile* pFileObject
)
{
UNREFERENCED_PARAMETER(pQueue);
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FLAG_QUEUE, "%!FUNC! Entry");
// This critical section protects the section of code where we
// Create the serializer and results interfaces used in handling I/O messages.
// We only need to create them once, then we hang on to them for the lifetime of this
// queue object.
CComCritSecLock<CComAutoCriticalSection> Lock(m_CriticalSection);
HRESULT hr = S_OK;
// Create the WPD serializer
if ((hr == S_OK) &&
(m_pWpdSerializer == NULL))
{
hr = CoCreateInstance(CLSID_WpdSerializer,
NULL,
CLSCTX_INPROC_SERVER,
IID_IWpdSerializer,
(VOID**)&m_pWpdSerializer);
CHECK_HR(hr, "Failed to CoCreate CLSID_WpdSerializer");
}
// Create the client context map and associate it with the File Object
// so we can obtain it on a per-client basis.
if (hr == S_OK)
{
ContextMap* pClientContextMap = new ContextMap();
if(pClientContextMap != NULL)
{
hr = pFileObject->AssignContext(this, (void*)pClientContextMap);
CHECK_HR(hr, "Failed to set client context map");
// Release the client context map if we cannot set it
// properly
if(FAILED(hr))
{
pClientContextMap->Release();
pClientContextMap = NULL;
}
}
else
{
hr = E_OUTOFMEMORY;
CHECK_HR(hr, "Failed to create client context map");
}
}
pRequest->Complete(hr);
return;
}
CQueue::OnCleanup(
IWDFObject* pWdfObject
)
{
// Destroy the client context map
HRESULT hr = S_OK;
ContextMap* pClientContextMap = NULL;
hr = pWdfObject->RetrieveContext((void**)&pClientContextMap);
if((hr == S_OK) && (pClientContextMap != NULL))
{
pClientContextMap->Release();
pClientContextMap = NULL;
}
}
CQueue::OnCleanup(
IWDFObject* pWdfObject
)
{
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FLAG_QUEUE, "%!FUNC! Entry");
// Destroy the client context map
HRESULT hr = S_OK;
ContextMap* pClientContextMap = NULL;
hr = pWdfObject->RetrieveContext((void**)&pClientContextMap);
if((hr == S_OK) && (pClientContextMap != NULL))
{
pClientContextMap->Release();
pClientContextMap = NULL;
}
}