mirror of
https://github.com/reactos/reactos.git
synced 2024-12-28 18:15:11 +00:00
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS Keyboard class driver
|
|
* FILE: drivers/input/kbdclass/misc.c
|
|
* PURPOSE: Miscellaneous operations
|
|
*
|
|
* PROGRAMMERS: Hervé Poussineau (hpoussin@reactos.org)
|
|
*/
|
|
|
|
#include "kbdclass.h"
|
|
|
|
#include <debug.h>
|
|
|
|
static IO_COMPLETION_ROUTINE ForwardIrpAndWaitCompletion;
|
|
|
|
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;
|
|
|
|
ASSERT(!((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsClassDO);
|
|
LowerDevice = ((PPORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
|
|
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
IoCopyCurrentIrpStackLocationToNext(Irp);
|
|
|
|
TRACE_(CLASS_NAME, "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;
|
|
|
|
ASSERT(!((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsClassDO);
|
|
LowerDevice = ((PPORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
|
|
|
|
IoSkipCurrentIrpStackLocation(Irp);
|
|
return IoCallDriver(LowerDevice, Irp);
|
|
}
|
|
|
|
NTSTATUS
|
|
DuplicateUnicodeString(
|
|
IN ULONG Flags,
|
|
IN PCUNICODE_STRING SourceString,
|
|
OUT PUNICODE_STRING DestinationString)
|
|
{
|
|
if (SourceString == NULL || DestinationString == NULL
|
|
|| SourceString->Length > SourceString->MaximumLength
|
|
|| (SourceString->Length == 0 && SourceString->MaximumLength > 0 && SourceString->Buffer == NULL)
|
|
|| Flags == RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING || Flags >= 4)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
|
|
if ((SourceString->Length == 0)
|
|
&& (Flags != (RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
|
|
RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING)))
|
|
{
|
|
DestinationString->Length = 0;
|
|
DestinationString->MaximumLength = 0;
|
|
DestinationString->Buffer = NULL;
|
|
}
|
|
else
|
|
{
|
|
USHORT DestMaxLength = SourceString->Length;
|
|
|
|
if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
|
|
DestMaxLength += sizeof(UNICODE_NULL);
|
|
|
|
DestinationString->Buffer = ExAllocatePoolWithTag(PagedPool, DestMaxLength, CLASS_TAG);
|
|
if (DestinationString->Buffer == NULL)
|
|
return STATUS_NO_MEMORY;
|
|
|
|
RtlCopyMemory(DestinationString->Buffer, SourceString->Buffer, SourceString->Length);
|
|
DestinationString->Length = SourceString->Length;
|
|
DestinationString->MaximumLength = DestMaxLength;
|
|
|
|
if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
|
|
DestinationString->Buffer[DestinationString->Length / sizeof(WCHAR)] = 0;
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|