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DXGKCB_GETHANDLEPARENT callback function (d3dkmddi.h)

  • Article

DXGKCB_GETHANDLEPARENT retrieves the parent resource from the specified allocation.

Syntax

DXGKCB_GETHANDLEPARENT DxgkcbGethandleparent;

D3DKMT_HANDLE DxgkcbGethandleparent(
  [in] IN_D3DKMT_HANDLE hAllocation
)
{...}

Parameters

[in] hAllocation

A handle to an allocation. This handle must be the kernel-mode handle that the DirectX graphics kernel subsystem (Dxgkrnl.sys) assigned for the allocation.

Return value

DXGKCB_GETHANDLEPARENT returns a graphics subsystem-specific handle to the parent resource for the allocation that is associated with the handle that the hAllocation parameter specifies.

If DXGKCB_GETHANDLEPARENT returns a NULL handle, Dxgkrnl.sys was unable to resolve the handle to the parent resource for a reason such as the following possibilities:

  • An invalid handle was received from the user-mode display driver because of a malicious attack or some other bug.
  • Allocations had lifetime issues.

If a NULL handle is returned, the display miniport driver should fail its currently running DDI function with STATUS_INVALID_HANDLE.

Remarks

For DXGKCB_GETHANDLEPARENT to return a resource handle, the handle in hAllocation must be an allocation handle that is associated with a resource; otherwise, DXGKCB_GETHANDLEPARENT returns NULL.

DXGKCB_XXX functions are implemented by Dxgkrnl. To use this callback function, call DxgkCbGetHandleParent via the DXGKRNL_INTERFACE.

Requirements

Requirement Value
Minimum supported client Windows Vista (WDDM 1.0)
Target Platform Desktop
Header d3dkmddi.h (include D3dkmddi.h)
IRQL < DISPATCH_LEVEL

See also

DXGKRNL_INTERFACE