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