ISensorClassExtension::Uninitialize method (sensorsclassextension.h)
The ISensorClassExtension::Uninitialize method uninitializes the sensor class extension object.
Syntax
HRESULT Uninitialize();
Return value
This method returns an HRESULT. Possible values include, but are not limited to, one of the following values.
| Return code | Description |
|---|---|
| S_OK | The method succeeded. |
| HRESULT_FROM_WIN32(ERROR_CAN_NOT_COMPLETE) | The class extension is not initialized. |
Remarks
Typically, you will uninitialize the sensor class extension when the driver is unloading. We recommend that you perform uninitialization steps when called by UMDF in IPnpCallbackHardware::OnReleaseHardware.
If you must, for some reason, otherwise release and uninitialize the sensor class extension, you must call IWDFIoQueue::DrainSynchronously before calling ISensorClassExtension::Uninitialize. You can retrieve the queue interface by calling IWDFDevice::GetDefaultIoQueue on the WDF device object. Then, call IWDFIoQueue::DrainSynchronously to process all the queued requests. Calling IWDFIoQueue::DrainSynchronously blocks the queuing of new requests, so you must call IWDFIoQueue::Start after you reinitialize the class extension.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | sensorsclassextension.h |
| Library | SensorsClassExtension.lib |