reactos操作系统实现(76)

当键盘类驱动程序或鼠标类驱动程序枚举时，会找到很多设备，这些设备需要使用回调的方式来进行初始化。下面的函数，就是实现回调初始化驱动程序，如下：

#001  VOID

#002  NTAPI

#003  IopReinitializeBootDrivers(VOID)

#004  {

#005      PDRIVER_REINIT_ITEM ReinitItem;

#006      PLIST_ENTRY Entry;

#007 

找到需要重新初始化入口列表头。

#008      /* Get the first entry and start looping */

#009      Entry = ExInterlockedRemoveHeadList(&DriverBootReinitListHead,

#010                                          &DriverBootReinitListLock);

#011      while (Entry)

#012      {

#013          /* Get the item*/

#014          ReinitItem = CONTAINING_RECORD(Entry, DRIVER_REINIT_ITEM, ItemEntry);

#015 

增加初始化计数。

#016          /* Increment reinitialization counter */

#017          ReinitItem->DriverObject->DriverExtension->Count++;

#018 

删除需要重新初始化的标志。

#019          /* Remove the device object flag */

#020          ReinitItem->DriverObject->Flags &= ~DRVO_BOOTREINIT_REGISTERED;

#021 

调用重新初始化函数。

#022          /* Call the routine */

#023          ReinitItem->ReinitRoutine(ReinitItem->DriverObject,

#024                                    ReinitItem->Context,

#025                                    ReinitItem->DriverObject->

#026                                    DriverExtension->Count);

#027 

#028          /* Free the entry */

#029          ExFreePool(Entry);

#030 

移动下一次节点初始化。

#031          /* Move to the next one */

#032          Entry = ExInterlockedRemoveHeadList(&DriverBootReinitListHead,

#033                                              &DriverBootReinitListLock);

#034      }

#035  }