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IWDFIoRequest3 interface (wudfddi.h)
[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]
To obtain the IWDFIoRequest3 interface, drivers call IWDFIoRequest::QueryInterface.
Inheritance
The IWDFIoRequest3 interface inherits from IWDFIoRequest2. IWDFIoRequest3 also has these types of members:
- Methods
Methods
The IWDFIoRequest3 interface has these methods.
| IWDFIoRequest3::GetUserModeDriverInitiatedIo The GetUserModeDriverInitiatedIo method determines whether an I/O request is marked as initiated by a UMDF driver. |
| IWDFIoRequest3::RetrieveActivityId The RetrieveActivityId method retrieves the current activity identifier associated with an I/O request. |
| IWDFIoRequest3::SetActivityId The SetActivityId method associates an activity identifier with an I/O request. |
| IWDFIoRequest3::SetUserModeDriverInitiatedIo The SetUserModeDriverInitiatedIo method indicates to kernel-mode drivers that sit below the UMDF driver in the same device stack that a particular request should be treated as though it came from a UMDF driver. |
Requirements
| Requirement | Value |
|---|---|
| End of support | Unavailable in UMDF 2.0 and later. |
| Target Platform | Desktop |
| Minimum UMDF version | 1.11 |
| Header | wudfddi.h |
See also
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