WdfIoResourceListAppendDescriptor function

Description

[Applies to KMDF only]

The WdfIoResourceListAppendDescriptor method adds a resource descriptor to the end of a resource requirements list's logical configuration.

Parameters

ResourceList [in]

A handle to a framework resource-range-list object that represents a logical configuration of hardware resources for a device.

Descriptor [in]

A pointer to an IO_RESOURCE_DESCRIPTOR structure that describes a hardware resource.

Return value

WdfIoResourceListAppendDescriptor returns STATUS_SUCCESS if the operation succeeds. Otherwise, this method might return one of the following values:

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

Remarks

The framework copies the contents of the IO_RESOURCE_DESCRIPTOR structure that the Descriptor parameter points to into internal storage, so the driver routine that calls WdfIoResourceListAppendDescriptor can allocate the structure locally. After the driver calls WdfIoResourceListAppendDescriptor, the driver can reuse the IO_RESOURCE_DESCRIPTOR structure.

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

Examples

The following code example creates an empty logical configuration and adds it to a resource requirements list. Then, the example initializes a resource descriptor and adds the descriptor to the logical configuration.

IO_RESOURCE_DESCRIPTOR  descriptor;
NTSTATUS  status;
WDFIORESLIST  logConfig;

status = WdfIoResourceListCreate(
                                 RequirementsList,
                                 WDF_NO_OBJECT_ATTRIBUTES,
                                 &logConfig
                                 );
if (!NT_SUCCESS(status)) {
    return status;
}

status = WdfIoResourceRequirementsListAppendIoResList(
                                                      RequirementsList,
                                                      logConfig
                                                      );
if (!NT_SUCCESS(status)) {
    return status;
}

RtlZeroMemory(
              &descriptor,
              sizeof(descriptor)
              );

descriptor.Option = 0;
descriptor.Type = CmResourceTypePort;
descriptor.ShareDisposition = CmResourceShareDeviceExclusive;
descriptor.Flags = CM_RESOURCE_PORT_IO|CM_RESOURCE_PORT_16_BIT_DECODE;
descriptor.u.Port.Length = 1;
descriptor.u.Port.Alignment = 0x01;
descriptor.u.Port.MinimumAddress.QuadPart = 0;
descriptor.u.Port.MaximumAddress.QuadPart = 0xFFFF;

status = WdfIoResourceListAppendDescriptor(
                                           logConfig,
                                           &descriptor
                                           );

See also

IO_RESOURCE_DESCRIPTOR

WdfIoResourceListCreate

WdfIoResourceListInsertDescriptor