IoInitializeDpcRequest function (wdm.h)
The IoInitializeDpcRequest routine registers a driver-supplied DpcForIsr routine.
Syntax
void IoInitializeDpcRequest(
[in] PDEVICE_OBJECT DeviceObject,
[in] PIO_DPC_ROUTINE DpcRoutine
);
Parameters
[in] DeviceObject
Supplies a pointer to the DEVICE_OBJECT structure representing the physical device that generates interrupts.
[in] DpcRoutine
Supplies a pointer to the driver-supplied DpcForIsr routine.
Return value
None
Remarks
IoInitializeDpcRequest associates a driver-supplied DpcForIsr routine with a given device object. The driver's InterruptService routine (ISR) can call IoRequestDpc to queue the DpcForIsr routine. The DpcForIsr routine completes interrupt-driven I/O operations at a lower IRQL than that of the ISR.
PnP drivers call IoInitializeDpcRequest from the AddDevice routine.
For more information, see DPC Objects and DPCs.
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 |