[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.]
A driver's IPowerPolicyCallbackWakeFromS0 interface provides callback functions that the framework calls to notify the driver about wake events. These events are related to a device's ability to wake from a low-power state while the system remains in the system working state (S0).
The IPowerPolicyCallbackWakeFromS0 interface has these methods.
|IPowerPolicyCallbackWakeFromS0::OnArmWakeFromS0||A driver's OnArmWakeFromS0 callback function arms (that is, enables) a device so that it can trigger a wake signal while in a low-power device state, if the system remains in the system working state (S0).|
|IPowerPolicyCallbackWakeFromS0::OnDisarmWakeFromS0||A driver's OnDisarmWakeFromS0 event callback function disarms (that is, disables) a device's ability to trigger a wake signal while in a low-power device state, if the system remains in the system working state (S0).|
|IPowerPolicyCallbackWakeFromS0::OnWakeFromS0Triggered||A driver's OnWakeFromS0Triggered event callback function informs the driver that its device, which had previously entered a low-power device state while the system power state remained at S0, might have triggered a wake signal.|
If your driver supports an IPowerPolicyCallbackWakeFromS0 interface for a device, the IUnknown::QueryInterface method that the driver passes to IWDFDriver::CreateDevice must return the interface.
|End of support||Unavailable in UMDF 2.0 and later.|
|Minimum UMDF version||1.9|
|Header||wudfddi.h (include Wudfddi.h)|
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