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