WdfDeviceInitSetRequestAttributes method
[Applies to KMDF and UMDF]
The WdfDeviceInitSetRequestAttributes method sets object attributes that will be used for all of the framework request objects that the framework delivers to the driver from the device's I/O queues.
Syntax
VOID WdfDeviceInitSetRequestAttributes( [in] PWDFDEVICE_INIT DeviceInit, [in] PWDF_OBJECT_ATTRIBUTES RequestAttributes );
Parameters
- DeviceInit [in]
-
A caller-supplied pointer to a WDFDEVICE_INIT structure.
- RequestAttributes [in]
-
A pointer to a caller-allocated WDF_OBJECT_ATTRIBUTES structure that contains attributes for the device's request objects.
Return value
None
Remarks
Your driver can call WdfDeviceInitSetRequestAttributes to specify the object context space that the framework will assign to the request objects that it creates for your driver. For more information about this context space, see Using Request Object Context.
The framework does not use the specified object attributes for request objects that it creates when a driver calls WdfRequestCreate or WdfRequestCreateFromIrp.
Your driver must call WdfDeviceInitSetRequestAttributes from within its EvtDriverDeviceAdd callback function, before it calls WdfDeviceCreate. For more information, see Creating a Framework Device Object.
Examples
The following code example initializes a WDF_OBJECT_ATTRIBUTES structure and calls WdfDeviceInitSetRequestAttributes.
typedef struct _REQUEST_CONTEXT {
ULONG_PTR Information;
} REQUEST_CONTEXT, *PREQUEST_CONTEXT;
WDF_OBJECT_ATTRIBUTES attributes;
WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(
&attributes,
REQUEST_CONTEXT
);
WdfDeviceInitSetRequestAttributes(
DeviceInit,
&attributes
);
Requirements
|
Minimum KMDF version | 1.0 |
|---|---|
|
Minimum UMDF version | 2.0 |
|
Header |
|
|
Library |
|
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IRQL | <= DISPATCH_LEVEL |
|
DDI compliance rules | ChildDeviceInitAPI, ControlDeviceInitAPI, DeviceInitAPI, DriverCreate, KmdfIrql, KmdfIrql2, PdoDeviceInitAPI |
See also
