RtlCmDecodeMemIoResource function (wdm.h)
The RtlCmDecodeMemIoResource routine provides the starting address and length of a CM_PARTIAL_RESOURCE_DESCRIPTOR structure that describes a range of memory or I/O port addresses.
Syntax
NTSYSAPI ULONGLONG RtlCmDecodeMemIoResource(
[in] PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor,
[out, optional] PULONGLONG Start
);
Parameters
[in] Descriptor
A pointer to the CM_PARTIAL_RESOURCE_DESCRIPTOR structure to provide the starting address and length for.
[out, optional] Start
A pointer to a variable that receives the starting address of the range of memory or I/O port addresses.
Return value
RtlCmDecodeMemIoResource returns the length of the address range, in bytes.
Remarks
The Type member of the CM_PARTIAL_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 |