Bewerken

Delen via

WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER structure (wdfchildlist.h)

  • Artikel

[Applies to KMDF only]

The WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER structure is a header structure that must be the first member of every identification description structure.

Syntax

typedef struct _WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER {
  ULONG IdentificationDescriptionSize;
} WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER, *PWDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER;

Members

IdentificationDescriptionSize

The size, in bytes, of a driver-defined structure that contains device identification information.

Remarks

To initialize a WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER structure, your driver should call WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER_INIT.

The value that the driver specifies for the IdentificationDescriptionSize member must match the value it specifies for the IdentificationDescriptionSize member in its WDF_CHILD_LIST_CONFIG structure.

Identification description structures are driver-defined. The driver must store the structure's size in the IdentificationDescriptionSize member. The size value must include the size of this header structure. For example, a driver might define an identification descriptor as follows:

typedef struct _IEEE_1394_CHILD_ID_DESCRIPTION {
  WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER  IdHeader;
 WCHAR  VendorName[32];
 WCHAR  ModelName[32];
 LONG  UnitSpecId; 
 LONG  UnitSoftwareVersion;
} IEEE_1394_CHILD_ID_DESCRIPTION, *PIEEE_1394_CHILD_ID_DESCRIPTION;

To set the IdentificationDescriptionSize member for this address descriptor, the driver can use the following code:

IEEE_1394_CHILD_ID_DESCRIPTION ID_Description;
WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER_INIT(&ID_Description,
                                                 sizeof(ID_Description));

For more information about identification descriptions, see Dynamic Enumeration.

Requirements

Requirement Value
Minimum KMDF version 1.0
Header wdfchildlist.h (include Wdf.h)

See also

WDF_CHILD_ADDRESS_DESCRIPTION_HEADER

WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER_INIT

WDF_CHILD_LIST_CONFIG