Registry Callback and Thread context

NTDEV
1

Hi!
I am developing a registry callback routine using CmRegisterCallback.
Is it GUARANTEED that the POST callback for a particular operation( on a particular object) will be called in the SAME thread context as the PRE callback for that operation?

Thanks.

2

This is what MSDN says on the subject:

[begin quote]

RegisterCallback executes at IRQL = PASSIVE_LEVEL and in the context of the thread that is performing the registry operation.

[end quote]

As you can see, the above statement is unconditional - it does not even suggest that thread context may somehow depend on ‘Argument2’…

Anton Bassov

3

Thanks Anton,
Is “THREAD” that is being referred to in the documentation, the thread that requested the registry operation?
And does it imply that if thread T1 issued a SetValueKey request on a key then the BOTH Pre and Post callbacks for this operation will come in context of T1?

4

> Is “THREAD” that is being referred to in the documentation, the thread that

requested the registry operation?
And does it imply that if thread T1 issued a SetValueKey request on a key then
the BOTH Pre and Post callbacks for this operation will come in context of T1?

Well, the way I understand the above MSDN quote, this is exactly what it implies…

Anton Bassov