Summary of Framework Objects

The following table lists all of the framework objects and provides some basic information about each object. The mode column indicates whether the object can be used in KMDF and UMDF drivers, or KMDF only.

For a list of callbacks and methods and which frameworks are applicable, see Summary of WDF Callbacks and Methods.

NameHandlePurposeDefault parentCan driver override default parent?ModeReference

Child-list object

WDFCHILDLIST

Represents a list of child devices that are connected to a parent device.

Device object

No

KM WDF Child-List Object Reference

Collection object

WDFCOLLECTION

Represents an object collection.

Driver object

Yes

KM/UM WDF Collection Object Reference

Common buffer object

WDFCOMMONBUFFER

Represents a common buffer.

DMA enabler object

No

KM WDF Common Buffer Object Reference

Device object

WDFDEVICE

Represents a device.

Driver object

No

KM/UM WDF Device Object Reference

DMA enabler object

WDFDMAENABLER

Enables a driver to use the framework's DMA capabilities.

Device object

Yes

KM WDF DMA Object Reference

DMA transaction object

WDFDMATRANSACTION

Represents a DMA transaction.

DMA enabler object

No

KM WDF DMA Object Reference

DPC object

WDFDPC

Represents a deferred procedure call.

None

Yes

KM WDF DPC Object Reference

Driver object

WDFDRIVER

Represents a driver.

None

No

KM/UM WDF Driver Object Reference

File object

WDFFILEOBJECT

Represents a file.

Device object

No

KM/UM WDF File Object Reference

General object

WDFOBJECT

Represents a general object.

Driver object

Yes

KM/UM WDF General Object Reference

Interrupt object

WDFINTERRUPT

Represents a hardware interrupt resource.

Device object

Yes

KM/UM WDF Interrupt Object Reference

I/O target object

WDFIOTARGET

Represents a driver to which another driver sends I/O requests.

Device object

Yes

KM/UM WDF I/O Target Object Reference

Lookaside-list object

WDFLOOKASIDE

Represents a lookaside list.

Driver object

Yes

KM WDF Memory Object Reference

Memory object

WDFMEMORY

Represents a memory buffer.

Driver object

Yes

KM/UM WDF Memory Object Reference

Queue object

WDFQUEUE

Represents an I/O queue that receives I/O requests.

Device object

Yes

KM/UM WDF Queue Object Reference

Registry key object

WDFKEY

Represents a registry key.

Driver object

Yes

KM/UM WDF Registry Key Object Reference

Request object

WDFREQUEST

Represents an I/O request.

None, if created by framework. Driver object, if created by driver.

Yes, if created by driver.

KM/UM WDF Request Object Reference

Resource list object

WDFCMRESLIST

Represents a resource list.

Driver object

No

KM/UM WDF Resource Object Reference

Resource range list object

WDFIORESLIST

Represents a logical configuration.

Resource requirements list object

No

KM WDF Resource Object Reference

Resource requirements list object

WDFIORESREQLIST

Represents a resource requirements list.

Driver object

No

KM WDF Resource Object Reference

Spin-lock object

WDFSPINLOCK

Represents a spin lock.

Driver object

Yes

KM/UM WDF Synchronization Methods

String object

WDFSTRING

Repesents a Unicode string.

Driver object

Yes

KM/UM WDF String Object Reference

Timer object

WDFTIMER

Represents a timer.

None

Yes

KM/UM WDF Timer Object Reference

USB device object

WDFUSBDEVICE

Represents a device connected to a USB.

Device object

No

KM/UM WDF USB Reference

USB interface object

WDFUSBINTERFACE

Represents a USB device interface.

USB device object

No

KM/UM WDF USB Reference

USB pipe object

WDFUSBPIPE

Represents a USB device pipe.

USB interface object

No

KM/UM WDF USB Reference

Wait-lock object

WDFWAITLOCK

Represents a wait lock.

Driver object

Yes

KM/UM WDF Synchronization Methods

WMI instance object

WDFWMIINSTANCE

Represents an instance of a WMI data block.

WMI provider object

No

KM WDF WMI Reference

WMI provider object

WDFWMIPROVIDER

Represents a WMI data block.

Device object

No

KM WDF WMI Reference

Work-item object

WDFWORKITEM

Represents a work item.

None

Yes

KM/UM WDF Work-Item Object Reference

 

 

 

Send comments about this topic to Microsoft

Show:
© 2015 Microsoft