PVFAT_IRP_CONTEXT VfatAllocateIrpContext	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 174 of file misc.c.

Referenced by VfatBuildRequest().

{
   PVFAT_IRP_CONTEXT IrpContext;
   /*PIO_STACK_LOCATION Stack;*/
   UCHAR MajorFunction;
   DPRINT ("VfatAllocateIrpContext(DeviceObject %p, Irp %p)\n", DeviceObject, Irp);

   ASSERT(DeviceObject);
   ASSERT(Irp);

   IrpContext = ExAllocateFromNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList);
   if (IrpContext)
   {
      RtlZeroMemory(IrpContext, sizeof(VFAT_IRP_CONTEXT));
      IrpContext->Irp = Irp;
      IrpContext->DeviceObject = DeviceObject;
      IrpContext->DeviceExt = DeviceObject->DeviceExtension;
      IrpContext->Stack = IoGetCurrentIrpStackLocation(Irp);
      ASSERT(IrpContext->Stack);
      MajorFunction = IrpContext->MajorFunction = IrpContext->Stack->MajorFunction;
      IrpContext->MinorFunction = IrpContext->Stack->MinorFunction;
      IrpContext->FileObject = IrpContext->Stack->FileObject;
      IrpContext->Flags = 0;
      if (MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
          MajorFunction == IRP_MJ_DEVICE_CONTROL ||
          MajorFunction == IRP_MJ_SHUTDOWN)
      {
         IrpContext->Flags |= IRPCONTEXT_CANWAIT;
      }
      else if (MajorFunction != IRP_MJ_CLEANUP &&
               MajorFunction != IRP_MJ_CLOSE &&
               IoIsOperationSynchronous(Irp))
      {
         IrpContext->Flags |= IRPCONTEXT_CANWAIT;
      }
      KeInitializeEvent(&IrpContext->Event, NotificationEvent, FALSE);
      IrpContext->RefCount = 0;
   }
   return IrpContext;
}

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