[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.]
The UnmapIoSpace method unmaps a specified range of physical addresses previously mapped by MapIoSpace method.
VOID UnmapIoSpace( [in] PVOID *PseudoBaseAddress, [in] SIZE_T NumberOfBytes );
Pointer to the pseudo base address obtained from a previous call to MapIoSpace method to which the physical address range was mapped.
Specifies the number of bytes that were mapped.
This method does not return a value.
For an example, see Finding and Mapping Hardware Resources in a UMDF Driver.
See example code in IWDFDevice3::MapIoSpace.
|End of support||Unavailable in UMDF 2.0 and later.|
|Minimum UMDF version||1.11|