WdfIoResourceRequirementsListGetCount method

[Applies to KMDF only]

The WdfIoResourceRequirementsListGetCount method returns the number of logical configurations that are contained in a resource requirements list.

Syntax


ULONG WdfIoResourceRequirementsListGetCount(
  [in] WDFIORESREQLIST RequirementsList
);

Parameters

RequirementsList [in]

A handle to a framework resource-requirements-list object that represents a device's resource requirements list.

Return value

WdfIoResourceRequirementsListGetCount returns the number of logical configurations that are contained in the resource requirements list.

A system bug check occurs if the driver supplies an invalid object handle.

Remarks

For more information about resource requirements lists, see Hardware Resources for Framework-Based Drivers.

Examples

The following code example shows how an EvtDeviceFilterRemoveResourceRequirements callback function can obtain the number of logical configurations that are contained in a resource requirements list.


NTSTATUS
Example_EvtDeviceFilterRemoveResourceRequirements(
    IN WDFDEVICE Device,
    IN WDFIORESREQLIST RequirementsList
    )
{    
    ULONG count;

    count = WdfIoResourceRequirementsListGetCount(RequirementsList);
}

Requirements

Target platform

Universal

Minimum KMDF version

1.0

Header

Wdfresource.h (include Wdf.h)

Library

Wdf01000.sys (see Framework Library Versioning.)

IRQL

<=DISPATCH_LEVEL

DDI compliance rules

DriverCreate, KmdfIrql, KmdfIrql2

 

 

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