RtlIoDecodeMemIoResource function (wdm.h)
The RtlIoDecodeMemIoResource routine provides the address information that is contained in an IO_RESOURCE_DESCRIPTOR structure that describes a range of memory or I/O port addresses.
Syntax
NTSYSAPI ULONGLONG RtlIoDecodeMemIoResource(
[in] PIO_RESOURCE_DESCRIPTOR Descriptor,
[out, optional] PULONGLONG Alignment,
[out, optional] PULONGLONG MinimumAddress,
[out, optional] PULONGLONG MaximumAddress
);
Parameters
[in] Descriptor
A pointer to the IO_RESOURCE_DESCRIPTOR structure to provide the address information for.
[out, optional] Alignment
A pointer to a variable that receives the alignment, in bytes, of the address range. This parameter can be NULL.
[out, optional] MinimumAddress
A pointer to a variable that receives the minimum address of the address range. This parameter can be NULL.
[out, optional] MaximumAddress
A pointer to a variable that receives the maximum address of the address range. This parameter can be NULL.
Return value
RtlIoDecodeMemIoResource returns the length of the address range, in bytes.
Remarks
The Type member of the IO_RESOURCE_DESCRIPTOR structure must be CmResourceTypeMemory, CmResourceTypeMemoryLarge, or CmResourceTypePort.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows Vista and later versions of Windows. |
| Target Platform | Universal |
| Header | wdm.h (include Wdm.h, Ntddk.h, Ntifs.h) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | Any level |