[PATCH 5/5] qedit: Implement IAMTimelineObj_GetTimelineNoRef and add tests.

Nikolay Sivov bunglehead at gmail.com
Wed Apr 27 02:44:40 CDT 2016

On 26.04.2016 16:33, Andrew Eikum wrote:
> On Mon, Apr 25, 2016 at 11:46:09PM -0600, Alex Henrie wrote:
>> 2016-04-25 23:10 GMT-06:00 Nikolay Sivov <bunglehead at gmail.com>:
>>> On 26.04.2016 7:57, Alex Henrie wrote:
>>>> 2016-04-25 22:21 GMT-06:00 Nikolay Sivov <bunglehead at gmail.com>:
>>>>> On 26.04.2016 6:10, Alex Henrie wrote:
>>>>>>  static HRESULT WINAPI TimelineObj_GetTimelineNoRef(IAMTimelineObj *iface, IAMTimeline **timeline)
>>>>>>  {
>>>>>> +    /* MSDN says that this function is "not supported" */
>>>>>>      TimelineObjImpl *This = impl_from_IAMTimelineObj(iface);
>>>>>> -    FIXME("(%p)->(%p): not implemented!\n", This, timeline);
>>>>>> -    return E_NOTIMPL;
>>>>>> +    TRACE("(%p)->(%p)\n", This, timeline);
>>>>>> +    if (!timeline) return E_POINTER;
>>>>>> +    return E_NOINTERFACE;
>>>>>>  }
>>>>> This looks like a call to QI, according to your tests.
>>>> It looks that way, but which interface would it be querying? The tests
>>>> show that an IAMTimelineObj cannot double as an IAMTimeline, nor is
>>>> the function supposed to return the IAMTimeline that was used to
>>>> create the IAMTimelineObj. My best guess is that Microsoft never
>>>> bothered implementing this function properly and so whatever
>>>> implementation they have always winds up returning E_NOINTERFACE.
>>> Yes, return type is IAMTimeline, so I was suggesting a shortcut doing
>>> same thing in one line IAMTimelineObj_QueryInterface(iface,
>>> &IID_IAMTimeline, ...). This should cover for setting out pointer to
>>> NULL, returning E_NOINTERFACE, and probably handling NULL case too,
>>> though it's not a standard QI behavior. None of that is actually
>>> important, what you did is fine, take it as a suggestion, or don't.
>> OK, I see what you mean now, and I'll make that change in version 2 of
>> this patchset.
> Eh, I'd rather keep it like it was. It's not clear whether it should
> be QIing on this same object or on the parent Timeline object, and the
> "NoRef" is weird behavior for a QI.  Implementing it on top of QI
> seems to imply confidence we don't have, and would confuse me if I was
> reading this code blind.

I agree, it's better to keep it simple, and NoRef implies something
non-standard. Sorry for the noise.

> Andrew

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