IoSizeOfIrp macro (ntifs.h)
The IoSizeOfIrp routine determines the size in bytes for an IRP, given the number of stack locations in the IRP.
Syntax
void IoSizeOfIrp(
StackSize
);
Parameters
StackSize
[in] Specifies the number of stack locations for the IRP.
Return value
None
Remarks
IoSizeOfIrp returns the size, in bytes, of the IRP.
The input StackSize value is either that of the next-lower driver's device object or one more than that value.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 |
| Target Platform | Desktop |
| Header | ntifs.h (include Wdm.h, Ntddk.h, Ntifs.h) |
| IRQL | Any level |