How to check if WDF object handler is valid?

How can I check if the WDF object handler is valid or not ? For example I
want to call WdfObjectDelete but I'm not sure whether the object was
correctly initialized in a first place.

> How can I check if the WDF object handler is valid or not ? For example I
> want to call WdfObjectDelete but I'm not sure whether the object was
> correctly initialized in a first place.

You should not code this way, you should only call delete for the objects which are surely still alive.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

> You should not code this way, you should only call delete for the objects which are surely still alive.

Thanks for the answer, but it did not answered my query. Question is whether
there is any function/magic that validates the object handler. The story with
WdfObjectDelete was only an example (maybe not perfect indeed) for better
understanding what I am looking for.

Michal

KMDF DDIs only check for object handle to be non-NULL. As suggested by
previous poster, caller has to make sure that he doesn't pass an invalid
object to KMDF DDI.

kumar
--
This posting is provided "AS IS" with no warranties, and confers no rights.

"Michal Jablonski" <> wrote in
message news:F31FF294-C02F-4D57-BE3A-...
>
>> You should not code this way, you should only call delete for the objects
>> which are surely still alive.
>
> Thanks for the answer, but it did not answered my query. Question is
> whether
> there is any function/magic that validates the object handler. The story
> with
> WdfObjectDelete was only an example (maybe not perfect indeed) for better
> understanding what I am looking for.
>
> Michal

no, maxim's answer is correct. there is no "is this valid" API. even if
there was one, as soon as it returned, the answer could be wrong b/c someone
else would delete the object. you need to track enough state such that you
know in your driver if you have something valid or not

d

--

This posting is provided "AS IS" with no warranties, and confers no rights.


"Michal Jablonski" <> wrote in
message news:F31FF294-C02F-4D57-BE3A-...
>
>> You should not code this way, you should only call delete for the objects
>> which are surely still alive.
>
> Thanks for the answer, but it did not answered my query. Question is
> whether
> there is any function/magic that validates the object handler. The story
> with
> WdfObjectDelete was only an example (maybe not perfect indeed) for better
> understanding what I am looking for.
>
> Michal