D3COLD_REQUEST_CORE_POWER_RAIL - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// wdm.h
D3COLD_REQUEST_CORE_POWER_RAIL D3coldRequestCorePowerRail;
VOID D3coldRequestCorePowerRail(
[_In_reads_opt_(_Inexpressible_("varies"))] PVOID Context,
[_In_] BOOLEAN CorePowerRailNeeded
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
Enables the function device object (FDO) to indicate whether the core power rail is needed.
Context [_In_reads_opt_(_Inexpressible_("varies"))]The handle to the device.
CorePowerRailNeeded: [_In_]A flag that indicates whether or not the driver needs the core power rail.
A device driver that successfully queries for the GUID_D3COLD_AUX_POWER_AND_TIMING_INTERFACE interface receives a pointer to a D3COLD_AUX_POWER_AND_TIMING_INTERFACE structure in which the driver sets the RequestCorePowerRail member to a pointer to its implementation of the _D3COLD_REQUEST_CORE_POWER_RAIL_ callback function.
If the driver indicates that the core power rail is needed, it is guaranteed that the core power rail is turned on when this call returns.
When a driver indicates that the core power rail is no longer needed, there is no guarantee of the core power rail state onwards.
This routine can never fail.