reactos/drivers/bus/acpi/compbatt/compmisc.c

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/*
* PROJECT: ReactOS Composite Battery Driver
* LICENSE: BSD - See COPYING.ARM in the top level directory
* FILE: boot/drivers/bus/acpi/compbatt/compmisc.c
* PURPOSE: Miscellaneous Support Routines
* PROGRAMMERS: ReactOS Portable Systems Group
*/
/* INCLUDES *******************************************************************/
#include "compbatt.h"
/* FUNCTIONS ******************************************************************/
NTSTATUS
NTAPI
BatteryIoctl(IN ULONG IoControlCode,
IN PDEVICE_OBJECT DeviceObject,
IN PVOID InputBuffer,
IN ULONG InputBufferLength,
IN PVOID OutputBuffer,
IN ULONG OutputBufferLength,
IN BOOLEAN InternalDeviceIoControl)
{
IO_STATUS_BLOCK IoStatusBlock;
KEVENT Event;
NTSTATUS Status;
PIRP Irp;
PAGED_CODE();
if (CompBattDebug & 0x100) DbgPrint("CompBatt: ENTERING BatteryIoctl\n");
/* Initialize the event and IRP */
KeInitializeEvent(&Event, SynchronizationEvent, 0);
Irp = IoBuildDeviceIoControlRequest(IoControlCode,
DeviceObject,
InputBuffer,
InputBufferLength,
OutputBuffer,
OutputBufferLength,
InternalDeviceIoControl,
&Event,
&IoStatusBlock);
if (Irp)
{
/* Call the class driver miniport */
Status = IofCallDriver(DeviceObject, Irp);
if (Status == STATUS_PENDING)
{
/* Wait for result */
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
Status = IoStatusBlock.Status;
}
/* Print failure */
if (!(NT_SUCCESS(Status)) && (CompBattDebug & 8))
DbgPrint("BatteryIoctl: Irp failed - %x\n", Status);
/* Done */
if (CompBattDebug & 0x100) DbgPrint("CompBatt: EXITING BatteryIoctl\n");
}
else
{
/* Out of memory */
if (CompBattDebug & 8) DbgPrint("BatteryIoctl: couldn't create Irp\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
}
/* Return status */
return Status;
}
NTSTATUS
NTAPI
CompBattGetDeviceObjectPointer(IN PUNICODE_STRING DeviceName,
IN ACCESS_MASK DesiredAccess,
OUT PFILE_OBJECT *FileObject,
OUT PDEVICE_OBJECT *DeviceObject)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
IO_STATUS_BLOCK IoStatusBlock;
PFILE_OBJECT LocalFileObject;
HANDLE DeviceHandle;
PAGED_CODE();
/* Open a file object handle to the device */
InitializeObjectAttributes(&ObjectAttributes, DeviceName, 0, NULL, NULL);
Status = ZwCreateFile(&DeviceHandle,
DesiredAccess,
&ObjectAttributes,
&IoStatusBlock,
NULL,
0,
FILE_SHARE_READ | FILE_SHARE_WRITE,
FILE_OPEN,
0,
NULL,
0);
if (NT_SUCCESS(Status))
{
/* Reference the file object */
Status = ObReferenceObjectByHandle(DeviceHandle,
0,
IoFileObjectType,
KernelMode,
(PVOID)&LocalFileObject,
NULL);
if (NT_SUCCESS(Status))
{
/* Return the FO and the associated DO */
*FileObject = LocalFileObject;
*DeviceObject = IoGetRelatedDeviceObject(LocalFileObject);
}
/* Close the handle */
ZwClose(DeviceHandle);
}
/* Return status */
return Status;
}
/* EOF */