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WDF_POWER_DEVICE_STATE enumeration (wdfdevice.h)

[Applies to KMDF and UMDF]

The WDF_POWER_DEVICE_STATE enumeration identifies the device power states that a device might support.

Syntax

typedef enum _WDF_POWER_DEVICE_STATE {
  WdfPowerDeviceInvalid = 0,
  WdfPowerDeviceD0,
  WdfPowerDeviceD1,
  WdfPowerDeviceD2,
  WdfPowerDeviceD3,
  WdfPowerDeviceD3Final,
  WdfPowerDevicePrepareForHibernation,
  WdfPowerDeviceMaximum
} WDF_POWER_DEVICE_STATE, *PWDF_POWER_DEVICE_STATE;

Constants

 
WdfPowerDeviceInvalid
Value: 0
The device power state is invalid or unknown.
WdfPowerDeviceD0
The D0 device power state.
WdfPowerDeviceD1
The D1 device power state.
WdfPowerDeviceD2
The D2 device power state.
WdfPowerDeviceD3
The D3 device power state.
WdfPowerDeviceD3Final
Represents the final time that the device enters the D3 device power state. Typically, this enumerator means that the system is being turned off, the device is about to be removed, or a resource rebalance is in progress. The device might have been already removed.
WdfPowerDevicePrepareForHibernation
The device supports hibernation files, and the system is ready to hibernate by entering system state S4. The driver must not turn off the device. For more information, see Supporting Special Files.
WdfPowerDeviceMaximum
The maximum enumerator value for this enumeration.

Requirements

Requirement Value
Minimum KMDF version 1.0
Minimum UMDF version 2.0
Header wdfdevice.h (include Wdf.h)

See also

EvtDeviceD0Entry

EvtDeviceD0Exit