#include <ntddk.h>
#include "ntifs.h"

PDEVICE_OBJECT
FileDiskDeleteDevice (
    IN PDEVICE_OBJECT DeviceObject
    )
{
    PDEVICE_EXTENSION   device_extension;
    PDEVICE_OBJECT      next_device_object;

    PAGED_CODE();

    ASSERT(DeviceObject != NULL);

    device_extension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;

    device_extension->terminate_thread = TRUE;

    KeSetEvent(
        &device_extension->request_event,
        (KPRIORITY) 0,
        FALSE
        );

    KeWaitForSingleObject(
        device_extension->thread_pointer,
        Executive,
        KernelMode,
        FALSE,
        NULL
        );

    ObDereferenceObject(device_extension->thread_pointer);

    if (device_extension->security_client_context != NULL)
    {
        SeDeleteClientSecurity(device_extension->security_client_context);
        ExFreePool(device_extension->security_client_context);
    }
	//刪除security_client_context

    next_device_object = DeviceObject->NextDevice;

    IoDeleteDevice(DeviceObject);
	//刪除DeviceObject

    return next_device_object;
}