PFND3DDDI_QUERYRESIDENCYCB callback function (d3dumddi.h)

2021-04-01

The pfnQueryResidencyCb function queries the residency status of a resource or list of allocations.

Syntax

PFND3DDDI_QUERYRESIDENCYCB Pfnd3dddiQueryresidencycb;

HRESULT Pfnd3dddiQueryresidencycb(
  HANDLE hDevice,
  const D3DDDICB_QUERYRESIDENCY *unnamedParam2
)
{...}

Parameters

hDevice

A handle to the display device (graphics context).

unnamedParam2

pData [in, out]

A pointer to a D3DDDICB_QUERYRESIDENCY structure that describes the residency status of a resource or list of allocations.

Return value

pfnQueryResidencyCb returns one of the following values:

Return code	Description
S_OK	The residency status was successfully returned.
E_INVALIDARG	Parameters were validated and determined to be incorrect.

This function might also return other HRESULT values.

Remarks

The user-mode display driver can call the pfnQueryResidencyCb function to query the residency status of allocations either through a resource or through a list of allocations. If the driver queries the residency status of allocations through a resource, all of the allocations that belong to the resource are queried. Typically, the user-mode display driver queries the residency of a resource or list of allocations after the Microsoft Direct3D runtime calls the user-mode display driver's QueryResourceResidency or QueryResourceResidencyDXGI function to determine the residency of a resource. However, the user-mode display driver can query the residency of a resource or list of allocations at any time.

Examples

The following code example shows how to query for residency status.

HRESULT
CD3DContext::QueryResourceResidency(CONST D3DDDIARG_QUERYRESOURCERESIDENCY* pQRR)
{
    D3DDDICB_QUERYRESIDENCY queryRes;
    D3DDDI_RESIDENCYSTATUS  resStatus = (D3DDDI_RESIDENCYSTATUS)0;
    HRESULT hr;
    BOOL    bPartInSharedMem = FALSE;

    for (UINT i = 0; i < pQRR->NumResources; i++) {
        memset(&queryRes, 0, sizeof(queryRes));
        queryRes.hResource = m_RTbl[(DWORD)(DWORD_PTR)pQRR->pHandleList[i]].m_hResRuntime;
        if (! queryRes.hResource) {
            return (DDERR_INVALIDPARAMS);
        }
        queryRes.pResidencyStatus = &resStatus;
        hr = m_d3dCallbacks.pfnQueryResidencyCb(m_hD3D, &queryRes);
        if (FAILED(hr)) {
            return (hr);
        }
        switch (resStatus) {
        case D3DDDI_RESIDENCYSTATUS_NOTRESIDENT:
            return S_NOT_RESIDENT;
        case D3DDDI_RESIDENCYSTATUS_RESIDENTINSHAREDMEMORY:
            bPartInSharedMem = TRUE;
            break;
        case D3DDDI_RESIDENCYSTATUS_RESIDENTINGPUMEMORY:
            break;
        default:
            return DDERR_GENERIC;
        }
    }
    if (bPartInSharedMem) {
        return S_RESIDENT_IN_SHARED_MEMORY;
    }
    else {
        return  S_OK;
    }
}

Requirements

Requirement	Value
Minimum supported client	Available in Windows Vista and later versions of the Windows operating systems.
Target Platform	Desktop
Header	d3dumddi.h (include D3dumddi.h)

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