The IoGetCurrentIrpStackLocation routine returns a pointer to the caller's I/O stack location in the specified IRP.
- Irp [in]
A pointer to the IRP.
IoGetCurrentIrpStackLocation returns a pointer to an IO_STACK_LOCATION structure that contains the I/O stack location for the driver.
Every driver must call IoGetCurrentIrpStackLocation with each IRP it is sent in order to get any parameters for the current request. Unless a driver supplies a dispatch routine for each IRP_MJ_XXX code that the driver handles, the driver also must check its I/O stack location in the IRP to determine what operation is being requested.
If a driver is passing the same parameters that it received to the next-lower driver, it should call IoCopyCurrentIrpStackLocationToNext or IoSkipCurrentIrpStackLocation instead of getting a pointer to the next-lower stack location and copying the parameters manually.
|Available starting with Windows 2000.|