NdisGroupActiveProcessorMask function (ndis.h)
The NdisGroupActiveProcessorMask function returns the currently active processor mask for the specified group.
Syntax
KAFFINITY NdisGroupActiveProcessorMask(
USHORT Group
);
Parameters
Group
A USHORT value that identifies a processor group in the local computer system.
Return value
NdisGroupActiveProcessorMask returns the currently active processor mask for the specified group as a KAFFINITY bitmap. In an environment that allows for hot-add functionality, this bitmap can change during runtime.
Remarks
An NDIS driver might call the NdisGroupActiveProcessorMask function during initialization before it allocates resources.
The KAFFINITY value that NdisGroupActiveProcessorMask returns can change at runtime on SKUs that support hot-add functionality for CPUs.
Note NDIS drivers should not use the
NdisSystemProcessorCount function
to retrieve the number of currently active processors. Also, NDIS 6.20 and later drivers should not use
the
NdisSystemActiveProcessorCount function because it only returns the processor count and provides
the affinity mask as an out parameter, for processor group 0.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Supported in NDIS 6.20 and later. |
| Target Platform | Universal |
| Header | ndis.h (include Ndis.h) |
| Library | Ndis.lib |
| IRQL | Any level |