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IWDFDevice2::ResumeIdle method (wudfddi.h)

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[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]

The ResumeIdle method informs the framework that the device is not in use and can be placed in a device low-power state if it remains idle.

Syntax

void ResumeIdle();

Return value

None

Remarks

Every call to IWDFDevice2::StopIdle must eventually be followed by a call to ResumeIdle, or else the device will never return to a low-power state if it again becomes idle.

For more information about StopIdle and ResumeIdle, see Supporting Idle Power-Down in UMDF-based Drivers.

Examples

The following code example obtains the IWDFDevice2 interface and then calls ResumeIdle.

    IWDFDevice2 *pIWDFDevice2 = NULL;
    HRESULT hr;

    //
    // Get a pointer to the IWDFDevice2 interface.
    //
    hr = pIWDFDevice->QueryInterface(__uuidof(IWDFDevice2),
                                     (void**) &pIWDFDevice2);
    if (SUCCEEDED(hr)) 
    {
    pIWDFDevice2->ResumeIdle();
    }
...
    SAFE_RELEASE(pIWDFDevice2);

Requirements

Requirement Value
End of support Unavailable in UMDF 2.0 and later.
Target Platform Desktop
Minimum UMDF version 1.9
Header wudfddi.h (include Wudfddi.h)
DLL WUDFx.dll

See also

IWDFDevice2

IWDFDevice2::StopIdle