NdisUnmapFile (NDIS 5.1) function
Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.
NdisUnmapFile releases a virtual address mapping of a file previously set up with NdisMapFile.
Syntax
VOID NdisUnmapFile(
_In_ NDIS_HANDLE FileHandle
);
Parameters
- FileHandle [in]
Specifies the handle returned by NdisOpenFile.
Return value
None
Remarks
To reduce resource usage, a NIC driver should always call NdisUnmapFile when it no longer needs exclusive access to the contents of a file that it opened. Such a driver can map and unmap the file as necessary, using alternating calls to NdisMapFile and NdisUnmapFile until it releases the file handle with NdisCloseFile.
Requirements
Target platform |
Universal |
Version |
See NdisUnmapFile. |
Header |
Ndis.h (include Ndis.h) |
Library |
Ndis.lib |
IRQL |
PASSIVE_LEVEL |
See also