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57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel Streaming
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* FILE: drivers/wdm/audio/legacy/stream/helper.c
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* PURPOSE: irp helper routines
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* PROGRAMMER: Johannes Anderwald
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*/
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#include "stream.h"
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NTSTATUS
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NTAPI
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CompletionRoutine(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN PVOID Context)
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{
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if (Irp->PendingReturned == TRUE)
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{
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KeSetEvent ((PKEVENT) Context, IO_NO_INCREMENT, FALSE);
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}
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return STATUS_MORE_PROCESSING_REQUIRED;
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}
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NTSTATUS
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NTAPI
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ForwardIrpSynchronous(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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KEVENT Event;
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PSTREAM_DEVICE_EXTENSION DeviceExt;
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NTSTATUS Status;
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DeviceExt = (PSTREAM_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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/* initialize the notification event */
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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IoCopyCurrentIrpStackLocationToNext(Irp);
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IoSetCompletionRoutine(Irp, CompletionRoutine, (PVOID)&Event, TRUE, TRUE, TRUE);
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/* now call the driver */
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Status = IoCallDriver(DeviceExt->LowerDeviceObject, Irp);
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/* did the request complete yet */
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if (Status == STATUS_PENDING)
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{
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/* not yet, lets wait a bit */
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KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
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Status = Irp->IoStatus.Status;
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}
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return Status;
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}
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