IWDFIoRequest3 interface

To obtain the IWDFIoRequest3 interface, drivers call IWDFIoRequest::QueryInterface.

Members

The IWDFIoRequest3 interface inherits from IWDFIoRequest2. IWDFIoRequest3 also has these types of members:

Methods

The IWDFIoRequest3 interface has these methods.

MethodDescription
GetUserModeDriverInitiatedIo

The GetUserModeDriverInitiatedIo method determines whether an I/O request is marked as initiated by a UMDF driver.

RetrieveActivityId

The RetrieveActivityId method retrieves the current activity identifier associated with an I/O request.

SetActivityId

The SetActivityId method associates an activity identifier with an I/O request.

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

End of support

Unavailable in UMDF 2.0 and later.

Minimum UMDF version

1.11

Header

Wudfddi.h

DLL

WUDFx.dll

 

 

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