mirror of
https://github.com/reactos/reactos.git
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111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Keyboard class driver
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* FILE: drivers/input/kbdclass/misc.c
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* PURPOSE: Misceallenous operations
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*
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* PROGRAMMERS: Hervé Poussineau (hpoussin@reactos.org)
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*/
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#include "kbdclass.h"
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static IO_COMPLETION_ROUTINE ForwardIrpAndWaitCompletion;
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static NTSTATUS NTAPI
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ForwardIrpAndWaitCompletion(
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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)
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KeSetEvent((PKEVENT)Context, IO_NO_INCREMENT, FALSE);
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return STATUS_MORE_PROCESSING_REQUIRED;
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}
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NTSTATUS
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ForwardIrpAndWait(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PDEVICE_OBJECT LowerDevice;
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KEVENT Event;
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NTSTATUS Status;
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ASSERT(!((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsClassDO);
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LowerDevice = ((PPORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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IoCopyCurrentIrpStackLocationToNext(Irp);
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TRACE_(CLASS_NAME, "Calling lower device %p\n", LowerDevice);
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IoSetCompletionRoutine(Irp, ForwardIrpAndWaitCompletion, &Event, TRUE, TRUE, TRUE);
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Status = IoCallDriver(LowerDevice, Irp);
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if (Status == STATUS_PENDING)
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{
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Status = KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
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if (NT_SUCCESS(Status))
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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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NTSTATUS NTAPI
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ForwardIrpAndForget(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PDEVICE_OBJECT LowerDevice;
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ASSERT(!((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsClassDO);
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LowerDevice = ((PPORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
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IoSkipCurrentIrpStackLocation(Irp);
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return IoCallDriver(LowerDevice, Irp);
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}
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NTSTATUS
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DuplicateUnicodeString(
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IN ULONG Flags,
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IN PCUNICODE_STRING SourceString,
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OUT PUNICODE_STRING DestinationString)
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{
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if (SourceString == NULL || DestinationString == NULL
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|| SourceString->Length > SourceString->MaximumLength
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|| (SourceString->Length == 0 && SourceString->MaximumLength > 0 && SourceString->Buffer == NULL)
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|| Flags == RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING || Flags >= 4)
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{
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return STATUS_INVALID_PARAMETER;
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}
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if ((SourceString->Length == 0)
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&& (Flags != (RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
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RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING)))
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{
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DestinationString->Length = 0;
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DestinationString->MaximumLength = 0;
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DestinationString->Buffer = NULL;
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}
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else
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{
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USHORT DestMaxLength = SourceString->Length;
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if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
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DestMaxLength += sizeof(UNICODE_NULL);
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DestinationString->Buffer = ExAllocatePoolWithTag(PagedPool, DestMaxLength, CLASS_TAG);
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if (DestinationString->Buffer == NULL)
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return STATUS_NO_MEMORY;
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RtlCopyMemory(DestinationString->Buffer, SourceString->Buffer, SourceString->Length);
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DestinationString->Length = SourceString->Length;
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DestinationString->MaximumLength = DestMaxLength;
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if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
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DestinationString->Buffer[DestinationString->Length / sizeof(WCHAR)] = 0;
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}
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return STATUS_SUCCESS;
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}
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