mirror of
https://github.com/reactos/reactos.git
synced 2024-09-12 13:54:41 +00:00
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: Parallel Port Function Driver
|
|
* FILE: drivers/parallel/parport/misc.c
|
|
* PURPOSE: Miscellaneous functions
|
|
*/
|
|
|
|
#include "parport.h"
|
|
|
|
|
|
static IO_COMPLETION_ROUTINE ForwardIrpAndWaitCompletion;
|
|
|
|
/* FUNCTIONS ****************************************************************/
|
|
|
|
static
|
|
NTSTATUS
|
|
NTAPI
|
|
ForwardIrpAndWaitCompletion(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PIRP Irp,
|
|
IN PVOID Context)
|
|
{
|
|
if (Irp->PendingReturned)
|
|
KeSetEvent((PKEVENT)Context, IO_NO_INCREMENT, FALSE);
|
|
return STATUS_MORE_PROCESSING_REQUIRED;
|
|
}
|
|
|
|
|
|
NTSTATUS
|
|
ForwardIrpAndWait(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PIRP Irp)
|
|
{
|
|
PDEVICE_OBJECT LowerDevice;
|
|
KEVENT Event;
|
|
NTSTATUS Status;
|
|
|
|
LowerDevice = ((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
|
|
ASSERT(LowerDevice);
|
|
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
IoCopyCurrentIrpStackLocationToNext(Irp);
|
|
|
|
DPRINT("Calling lower device %p\n", LowerDevice);
|
|
IoSetCompletionRoutine(Irp, ForwardIrpAndWaitCompletion, &Event, TRUE, TRUE, TRUE);
|
|
|
|
Status = IoCallDriver(LowerDevice, Irp);
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
Status = KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
|
|
if (NT_SUCCESS(Status))
|
|
Status = Irp->IoStatus.Status;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
ForwardIrpAndForget(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PIRP Irp)
|
|
{
|
|
PDEVICE_OBJECT LowerDevice;
|
|
|
|
if (((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->Common.IsFDO)
|
|
LowerDevice = ((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
|
|
else
|
|
LowerDevice = ((PPDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->AttachedFdo;
|
|
ASSERT(LowerDevice);
|
|
|
|
IoSkipCurrentIrpStackLocation(Irp);
|
|
return IoCallDriver(LowerDevice, Irp);
|
|
}
|
|
|
|
|
|
PVOID
|
|
GetUserBuffer(IN PIRP Irp)
|
|
{
|
|
ASSERT(Irp);
|
|
|
|
if (Irp->MdlAddress)
|
|
return Irp->MdlAddress;
|
|
else
|
|
return Irp->AssociatedIrp.SystemBuffer;
|
|
}
|
|
|
|
/* EOF */
|