IoSizeOfIrp macro (wdm.h)
The IoSizeOfIrp routine determines the size in bytes for an IRP, given the number of stack locations in the IRP.
Syntax
void IoSizeOfIrp(
[in] StackSize
);
Parameters
[in] StackSize
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 | Available starting with Windows 2000. |
| Target Platform | Desktop |
| Header | wdm.h (include Wdm.h, Ntddk.h, Ntifs.h) |
| IRQL | Any level |