/**
* This method is called when we receive a WPD_COMMAND_OBJECT_RESOURCES_CLOSE
* command.
*
* The parameters sent to us are:
* - WPD_PROPERTY_OBJECT_RESOURCES_CONTEXT: the context the driver returned to
* the client in OnOpenResource.
*
* The driver should:
* - Destroy any data associated with this context.
*/
HRESULT WpdObjectResources::OnCloseResource(
_In_ IPortableDeviceValues* pParams,
_In_ IPortableDeviceValues* pResults)
{
HRESULT hr = S_OK;
LPWSTR wszResourceContext = NULL;
ContextMap* pContextMap = NULL;
UNREFERENCED_PARAMETER(pResults);
// First get ALL parameters for this command. If we cannot get ALL parameters
// then E_INVALIDARG should be returned and no further processing should occur.
// Get the resource context identifier for this resource operation. We will
// need this to lookup the specific resource context in the client context map.
hr = pParams->GetStringValue(WPD_PROPERTY_OBJECT_RESOURCES_CONTEXT, &wszResourceContext);
if (hr != S_OK)
{
hr = E_INVALIDARG;
CHECK_HR(hr, "Missing value for WPD_PROPERTY_OBJECT_RESOURCES_CONTEXT");
}
// Get the client context map so we can retrieve the resource context for this resource
// operation using the WPD_PROPERTY_OBJECT_RESOURCES_CONTEXT property value obtained above.
if (hr == S_OK)
{
hr = pParams->GetIUnknownValue(PRIVATE_SAMPLE_DRIVER_CLIENT_CONTEXT_MAP, (IUnknown**)&pContextMap);
CHECK_HR(hr, "Failed to get PRIVATE_SAMPLE_DRIVER_CLIENT_CONTEXT_MAP");
}
// Destroy any data allocated/associated with the resource context and then remove it from the context map.
// We no longer need to keep this context around because the resource operation has been ended.
if (hr == S_OK)
{
pContextMap->Remove(wszResourceContext);
}
// Free the memory. CoTaskMemFree ignores NULLs so no need to check.
CoTaskMemFree(wszResourceContext);
SAFE_RELEASE(pContextMap);
return hr;
}
/**
* This method is called when we receive a WPD_COMMAND_OBJECT_ENUMERATION_END_FIND
* command.
*
* The parameters sent to us are:
* - WPD_PROPERTY_OBJECT_ENUMERATION_CONTEXT: the context the driver returned to
* the client in OnStartFind.
*
* The driver should:
* - Destroy any data associated with this context.
*/
HRESULT WpdObjectEnumerator::OnEndFind(
_In_ IPortableDeviceValues* pParams,
_Inout_ IPortableDeviceValues* pResults)
{
HRESULT hr = S_OK;
LPWSTR wszEnumContext = NULL;
ContextMap* pContextMap = NULL;
UNREFERENCED_PARAMETER(pResults);
// First get ALL parameters for this command. If we cannot get ALL parameters
// then E_INVALIDARG should be returned and no further processing should occur.
// Get the enumeration context identifier for this enumeration operation. We will
// need this to lookup the specific enumeration context in the client context map.
hr = pParams->GetStringValue(WPD_PROPERTY_OBJECT_ENUMERATION_CONTEXT, &wszEnumContext);
if (hr != S_OK)
{
hr = E_INVALIDARG;
CHECK_HR(hr, "Missing value for WPD_PROPERTY_OBJECT_ENUMERATION_CONTEXT");
}
// Get the client context map so we can retrieve the enumeration context for this enumeration
// operation using the WPD_PROPERTY_OBJECT_ENUMERATION_CONTEXT property value obtained above.
if (hr == S_OK)
{
hr = GetClientContextMap(pParams, &pContextMap);
CHECK_HR(hr, "Failed to get the client context map");
}
// Destroy any data allocated/associated with the enumeration context and then remove it from the context map.
// We no longer need to keep this context around because the enumeration has been ended.
if (hr == S_OK)
{
pContextMap->Remove(wszEnumContext);
}
// Free the memory. CoTaskMemFree ignores NULLs so no need to check.
CoTaskMemFree(wszEnumContext);
SAFE_RELEASE(pContextMap);
return hr;
}