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IPowerPolicyCallbackWakeFromSx interface (wudfddi.h)
[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 IPowerPolicyCallbackWakeFromSx 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 both itself and the system from a low-power state.
Inheritance
The IPowerPolicyCallbackWakeFromSx interface inherits from the IUnknown interface. IPowerPolicyCallbackWakeFromSx also has these types of members:
- Methods
Methods
The IPowerPolicyCallbackWakeFromSx interface has these methods.
| IPowerPolicyCallbackWakeFromSx::OnArmWakeFromSx A driver's OnArmWakeFromSx event callback function arms (that is, enables) a device so that it can trigger a wake signal while in a low-power device state. |
| IPowerPolicyCallbackWakeFromSx::OnDisarmWakeFromSx A driver's OnDisarmWakeFromSx event callback function disarms (that is, disables) a device's ability to trigger a wake signal while the device and system are in low-power states. |
| IPowerPolicyCallbackWakeFromSx::OnWakeFromSxTriggered A driver's OnWakeFromSxTriggered event callback function informs the driver that its device, which had previously entered a low-power device state because system power was reduced, might have triggered a wake signal. |
Remarks
If your driver supports an IPowerPolicyCallbackWakeFromSx interface for a device, the IUnknown::QueryInterface method that the driver passes to IWDFDriver::CreateDevice must return the interface.
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) |
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