POFXCALLBACKUPDATEPLATFORMIDLESTATE callback function (pepfx.h)
The UpdatePlatformIdleState routine is called by the platform extension plug-in (PEP) to update the properties of the specified platform idle state.
Syntax
POFXCALLBACKUPDATEPLATFORMIDLESTATE Pofxcallbackupdateplatformidlestate;
NTSTATUS Pofxcallbackupdateplatformidlestate(
[in] POHANDLE ProcessorHandle,
[in] ULONG PlatformState,
[in] PPEP_PLATFORM_IDLE_STATE_UPDATE Update
)
{...}
Parameters
[in] ProcessorHandle
A POHANDLE value that represents the registration of the processor (as a device) with the Windows power management framework (PoFx). The PEP previously received this handle from PoFx during the PEP_DPM_REGISTER_DEVICE notification that informed the PEP that the processor had been registered with PoFx.
[in] PlatformState
An index that identifies the platform idle state whose properties are to be updated. In response to a previous PEP_NOTIFY_PPM_QUERY_PLATFORM_STATES notification, the PEP specified the number of supported platform idle states. If the PEP specified N platform idle states, valid platform idle state indexes range from 0 to N-1. In response to a previous PEP_NOTIFY_PPM_QUERY_PLATFORM_STATE notification, the PEP specified the properties of this platform idle state.
[in] Update
A pointer to a PEP_PLATFORM_IDLE_STATE_UPDATE structure that contains the updated properties of the platform idle state.
Return value
UpdatePlatformIdleState returns STATUS_SUCCESS if it successfully updates the properties of the platform idle state. Possible error return values include the following status codes.
| Return value | Description |
|---|---|
|
The version number in the PEP_PLATFORM_IDLE_STATE_UPDATE structure is not a supported value. |
|
The UpdatePlatformIdleState routine is not implemented for this processor. |
Remarks
This routine is implemented by PoFx and is called by the PEP. The UpdatePlatformIdleState member of the PEP_KERNEL_INFORMATION_STRUCT_V3 structure is a pointer to an UpdatePlatformIdleState routine.
The PEP must wait until after it has completed all PEP_NOTIFY_PPM_QUERY_PLATFORM_STATE notifications to call the UpdatePlatformIdleState routine.
The UpdatePlatformIdleState routine must be called at IRQL = PASSIVE_LEVEL.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Supported starting with Windows 10. |
| Target Platform | Windows |
| Header | pepfx.h (include Pep_x.h) |
| IRQL | PASSIVE_LEVEL |
See also
PEP_KERNEL_INFORMATION_STRUCT_V3
PEP_NOTIFY_PPM_QUERY_PLATFORM_STATE